CriticalCVE-2026-76578

Red Hat Enterprise Linux 10: Missing Authentication for Critical Function (CVE-2026-76578)

Published 02.11.2026Last modified 05.11.2026Sources: BSI

What is affected, what to do

A flaw was found in FreeIPA. The self-managed OTP token ACI does not require authentication and does not restrict which attributes may be added alongside the token entry.

Update Red Hat Enterprise Linux 10 to version 0:4.13.4-1.el10_2, Red Hat Enterprise Linux 10.0 Extended Update Support to version 0:4.12.2-15.el10_0.7, Red Hat Enterprise Linux 7 Extended Lifecycle Support to version 0:4.6.8-5.el7_9.25.

Affected: Red Hat Enterprise Linux 10 lt *..0:4.13.4-1.el10_2
Red Hat Enterprise Linux 10.0 Extended Update Support lt *..0:4.12.2-15.el10_0.7
Red Hat Enterprise Linux 7 Extended Lifecycle Support lt *..0:4.6.8-5.el7_9.25
Red Hat Enterprise Linux 8 lt *..8100020261007071200.143e9e98
Red Hat Enterprise Linux 8 lt *..8100020261007070536.823393f5
Red Hat Enterprise Linux 8.4 Advanced Mission Critical Update Support lt *..8040020261027121250.f153676a
Red Hat Enterprise Linux 8.4 Advanced Mission Critical Update Support lt *..8040020261027121355.5b01ab7e
Red Hat Enterprise Linux 8.4 Extended Update Support Long-Life Add-On lt *..8040020261027121250.f153676a
Red Hat Enterprise Linux 8.4 Extended Update Support Long-Life Add-On lt *..8040020261027121355.5b01ab7e
Red Hat Enterprise Linux 8.6 Advanced Mission Critical Update Support lt *..8060020261008134123.c1533a64
Red Hat Enterprise Linux 8.6 Advanced Mission Critical Update Support lt *..8060020261008133528.ada582f1
Red Hat Enterprise Linux 8.6 Extended Update Support Long-Life Add-On lt *..8060020261008134123.c1533a64
Red Hat Enterprise Linux 8.6 Extended Update Support Long-Life Add-On lt *..8060020261008133528.ada582f1
Red Hat Enterprise Linux 8.8 Telecommunications Update Service lt *..8080020261007080925.e581a9e4
Red Hat Enterprise Linux 8.8 Telecommunications Update Service lt *..8080020261007071832.b0a6ceea
Red Hat Enterprise Linux 8.8 Update Services for SAP Solutions lt *..8080020261007080925.e581a9e4
Red Hat Enterprise Linux 8.8 Update Services for SAP Solutions lt *..8080020261007071832.b0a6ceea
Red Hat Enterprise Linux 9 lt *..0:4.13.4-1.el9_8
Red Hat Enterprise Linux 9.2 Update Services for SAP Solutions lt *..0:4.10.1-12.el9_2.7
Red Hat Enterprise Linux 9.4 Update Services for SAP Solutions lt *..0:4.11.0-15.el9_4.9
Red Hat Enterprise Linux 9.6 Extended Update Support lt *..0:4.12.2-14.el9_6.8
Fixed in: Red Hat Enterprise Linux 10 0:4.13.4-1.el10_2
Red Hat Enterprise Linux 10.0 Extended Update Support 0:4.12.2-15.el10_0.7
Red Hat Enterprise Linux 7 Extended Lifecycle Support 0:4.6.8-5.el7_9.25
Red Hat Enterprise Linux 8 8100020261007071200.143e9e98
Red Hat Enterprise Linux 8 8100020261007070536.823393f5
Red Hat Enterprise Linux 8.4 Advanced Mission Critical Update Support 8040020261027121250.f153676a
Red Hat Enterprise Linux 8.4 Advanced Mission Critical Update Support 8040020261027121355.5b01ab7e
Red Hat Enterprise Linux 8.4 Extended Update Support Long-Life Add-On 8040020261027121250.f153676a
Red Hat Enterprise Linux 8.4 Extended Update Support Long-Life Add-On 8040020261027121355.5b01ab7e
Red Hat Enterprise Linux 8.6 Advanced Mission Critical Update Support 8060020261008134123.c1533a64
Red Hat Enterprise Linux 8.6 Advanced Mission Critical Update Support 8060020261008133528.ada582f1
Red Hat Enterprise Linux 8.6 Extended Update Support Long-Life Add-On 8060020261008134123.c1533a64
Red Hat Enterprise Linux 8.6 Extended Update Support Long-Life Add-On 8060020261008133528.ada582f1
Red Hat Enterprise Linux 8.8 Telecommunications Update Service 8080020261007080925.e581a9e4
Red Hat Enterprise Linux 8.8 Telecommunications Update Service 8080020261007071832.b0a6ceea
Red Hat Enterprise Linux 8.8 Update Services for SAP Solutions 8080020261007080925.e581a9e4
Red Hat Enterprise Linux 8.8 Update Services for SAP Solutions 8080020261007071832.b0a6ceea
Red Hat Enterprise Linux 9 0:4.13.4-1.el9_8
Red Hat Enterprise Linux 9.2 Update Services for SAP Solutions 0:4.10.1-12.el9_2.7
Red Hat Enterprise Linux 9.4 Update Services for SAP Solutions 0:4.11.0-15.el9_4.9
Red Hat Enterprise Linux 9.6 Extended Update Support 0:4.12.2-14.el9_6.8

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Metrics

9.8

Priority

XIEM Effective CVSS: highest available CVSS rating from NVD and vendor data.

Source: NVD, CVSS v3

9.8

CVSS v3

Severity Critical on the scale from 0 to 10.

Source: BSI

1.3 %

EPSS score

Moderate — model estimates 1-10% exploitation likelihood.

Source: FIRST EPSS, percentile 70.9

Show all metrics

Severity: Critical
Priority (0–325) The priority score is a consolidated metric that condenses several individual signals into a single, action-guiding ranking: technical severity (CVSS), exploitation likelihood (EPSS), known-exploited status (KEV) and the context of the affected asset. The aim is to answer the only truly important question in vulnerability management: what first? Read in glossary: 89.24 Methodology
Exploit maturity An exploit is code or a technique that specifically uses a concrete vulnerability to force unintended behaviour — such as executing code or escalating privileges. It is the tool that turns a theoretical flaw into a practical attack. Read in glossary: no public PoC known
XIEM Effective CVSS XIEM® is the tiered managed-security operating model from NEOSEC and a registered trademark of NEOSEC GmbH. It extends classic SIEM — the central collection, normalisation and correlation of security-relevant events — with endpoint forensics, network visibility and deception technology, and consolidates them into three building tiers: Sentry, Orchestrate and Command. Read in glossary: 9.8 Methodology
CVSS v3 CVSS is the globally established, open standard for assessing the technical severity of a vulnerability on a scale from 0 to 10. It describes how easily a flaw can be exploited and what damage it can cause — but not how likely its actual exploitation is. CVSS and the complementary EPSS deliberately answer different questions. Read in glossary: 9.8
EPSS score The EPSS score is the absolute model output for an individual vulnerability: the estimated probability of real-world exploitation within the next 30 days, expressed as a value between 0 and 1 (i.e. 0 % to 100 %). A score of 0.42 means „the model estimates a 42 % chance of real-world exploitation within 30 days“. Read in glossary: 1.3 %; Moderate — model estimates 1-10% exploitation likelihood.
EPSS percentile The EPSS percentile is the relative position of a vulnerability within all EPSS-scored CVEs, expressed as a value between 0 and 1. A percentile of 0.90 means „this CVE has a higher EPSS score than 90 % of all other scored CVEs“. Unlike the EPSS score, it is not a probability — but a positioning within a ranking. Read in glossary: 70.9; High — this CVE ranks above the median of all CVEs scored today (rank ≥ 36%).
KEV status The KEV catalogue is a list maintained by the US authority CISA of vulnerabilities for which active exploitation in the wild has been confirmed. It answers not the question „how severe?“ but „is it already being attacked?“ — thereby sharply prioritising patching. Read in glossary: —
Published: 02.11.2026
CISA assessment (SSVC): Exploitation: none known · automatable · Technical impact: total; Source: CISA Vulnrichment, as of 8 September 2026
CWE CWE is a catalogue of typical weakness types in software and hardware — such as flawed input validation, unsafe memory handling or poor authentication. Where a CVE names a concrete vulnerability in a concrete product, a CWE describes the underlying class of defect. Read in glossary: CWE-306

Detection rules

No NEOSEC detection rule is available for this vulnerability yet.

Classification under NIS2 and CRA

Rule-based classification from exploitation status and severity. It does not replace a case-by-case assessment.

NIS2 NIS2 is EU Directive (EU) 2022/2555 to raise the level of cybersecurity across the Union. It substantially broadens obligations compared with the first NIS directive: more sectors, mandatory risk management, staged reporting duties and personal accountability of senior management. Read in glossary: High technical severity: assess and remediate the vulnerability in vulnerability handling under Art. 21(2)(e) NIS2 and document the decision.
CRA The CRA is EU Regulation (EU) 2024/2847 setting horizontal cybersecurity requirements for „products with digital elements“ — from industrial controllers and software to connected consumer devices. For the first time manufacturers must ensure security across the entire product lifecycle, handle vulnerabilities and provide security updates. Read in glossary: From 11.12.2027, Annex I Part II CRA requires manufacturers of affected products with digital elements to handle vulnerabilities without delay and provide security updates.
ISO/IEC 27001 ISO/IEC 27001 is the internationally leading standard for an information security management system (ISMS). It describes a risk-based, process-oriented framework to systematically plan, implement, review and improve information security. Read in glossary: Control A.8.8, management of technical vulnerabilities: assess relevance to your systems, plan remediation and keep evidence.

Description

A flaw was found in FreeIPA. The self-managed OTP token ACI does not require authentication and does not restrict which attributes may be added alongside the token entry. An unauthenticated LDAP client can exploit this, combined with a related flaw in the underlying directory server's ACI evaluation (tracked separately), to create an arbitrary attacker-controlled Kerberos principal and have it added to the administrators group. This allows a remote, unauthenticated attacker to obtain genuine FreeIPA administrator-group membership and perform administrative operations against the directory and, on SID-enabled deployments, other IdM services.

Source: BSI WID Portal

Affected products

The following versions are affected. Older releases of the same product line are also vulnerable unless stated otherwise.

Affected products
		Affected versions	Fixed in
Red Hat	Red Hat Enterprise Linux 10	`< 0:4.13.4-1.el10_2`	`0:4.13.4-1.el10_2`
Red Hat	Red Hat Enterprise Linux 10.0 Extended Update Support	`< 0:4.12.2-15.el10_0.7`	`0:4.12.2-15.el10_0.7`
Red Hat	Red Hat Enterprise Linux 6	`—`	—
Red Hat	Red Hat Enterprise Linux 7	`—`	—
Red Hat	Red Hat Enterprise Linux 7 Extended Lifecycle Support	`< 0:4.6.8-5.el7_9.25`	`0:4.6.8-5.el7_9.25`
Red Hat	Red Hat Enterprise Linux 8	`< 8100020261007070536.823393f5` `< 8100020261007071200.143e9e98`	`8100020261007070536.823393f5` `8100020261007071200.143e9e98`
Red Hat	Red Hat Enterprise Linux 8.4 Advanced Mission Critical Update Support	`< 8040020261027121250.f153676a` `< 8040020261027121355.5b01ab7e`	`8040020261027121250.f153676a` `8040020261027121355.5b01ab7e`
Red Hat	Red Hat Enterprise Linux 8.4 Extended Update Support Long-Life Add-On	`< 8040020261027121250.f153676a` `< 8040020261027121355.5b01ab7e`	`8040020261027121250.f153676a` `8040020261027121355.5b01ab7e`
Red Hat	Red Hat Enterprise Linux 8.6 Advanced Mission Critical Update Support	`< 8060020261008133528.ada582f1` `< 8060020261008134123.c1533a64`	`8060020261008133528.ada582f1` `8060020261008134123.c1533a64`
Red Hat	Red Hat Enterprise Linux 8.6 Extended Update Support Long-Life Add-On	`< 8060020261008133528.ada582f1` `< 8060020261008134123.c1533a64`	`8060020261008133528.ada582f1` `8060020261008134123.c1533a64`
Red Hat	Red Hat Enterprise Linux 8.8 Telecommunications Update Service	`< 8080020261007071832.b0a6ceea` `< 8080020261007080925.e581a9e4`	`8080020261007071832.b0a6ceea` `8080020261007080925.e581a9e4`
Red Hat	Red Hat Enterprise Linux 8.8 Update Services for SAP Solutions	`< 8080020261007071832.b0a6ceea` `< 8080020261007080925.e581a9e4`	`8080020261007071832.b0a6ceea` `8080020261007080925.e581a9e4`
Red Hat	Red Hat Enterprise Linux 9	`< 0:4.13.4-1.el9_8`	`0:4.13.4-1.el9_8`
Red Hat	Red Hat Enterprise Linux 9.2 Update Services for SAP Solutions	`< 0:4.10.1-12.el9_2.7`	`0:4.10.1-12.el9_2.7`
Red Hat	Red Hat Enterprise Linux 9.4 Update Services for SAP Solutions	`< 0:4.11.0-15.el9_4.9`	`0:4.11.0-15.el9_4.9`
Red Hat	Red Hat Enterprise Linux 9.6 Extended Update Support	`< 0:4.12.2-14.el9_6.8`	`0:4.12.2-14.el9_6.8`
freeipa	freeipa	`4.12.2` `< 4.13.3`	— `4.13.3`
Red Hat	Enterprise Linux	`9`	—

Vendors and products

Affected operating systems

Affected operating systems

Linux	redhat	enterprise_linux	`7.0`
Linux	redhat	enterprise_linux	—
Linux	redhat	enterprise_linux	`10.0`
Linux	redhat	enterprise_linux	`8.0`
Linux	redhat	enterprise_linux	`6.0`
Linux	redhat	enterprise_linux	`9.0`

Weakness classes (CWE)

CWE-306Missing Authentication for Critical Function
Base
The product does not perform any authentication for functionality that requires a provable user identity or consumes a significant amount of resources.
Entry at MITRE CWE-306

References & sources

access.redhat.comsecurity/cve/CVE-2026-73198Vulnerability database, x_refsource_REDHAT, Vendor advisory
bugzilla.redhat.comRHBZ#2472960Issue tracking, x_refsource_REDHAT, Issue tracking, Vendor advisory
access.redhat.comRHSA-2026:70564Vendor advisory, x_refsource_REDHAT
access.redhat.comRHSA-2026:72279Vendor advisory, x_refsource_REDHAT
access.redhat.comRHSA-2026:82935Vendor advisory, x_refsource_REDHAT
access.redhat.comRHSA-2026:83083Vendor advisory, x_refsource_REDHAT
access.redhat.comRHSA-2026:83084Vendor advisory, x_refsource_REDHAT
access.redhat.comRHSA-2026:83085Vendor advisory, x_refsource_REDHAT
access.redhat.comRHSA-2026:83460Vendor advisory, x_refsource_REDHAT
access.redhat.comRHSA-2026:83461Vendor advisory, x_refsource_REDHAT
access.redhat.comRHSA-2026:89836Vendor advisory, x_refsource_REDHAT
access.redhat.comRHSA-2026:93452Vendor advisory, x_refsource_REDHAT
access.redhat.comsecurity/cve/CVE-2026-11861Vulnerability database, x_refsource_REDHAT, Vendor advisory
bugzilla.redhat.comRHBZ#2487472Issue tracking, x_refsource_REDHAT, Issue tracking, Vendor advisory
access.redhat.comRHSA-2026:93071Vendor advisory, x_refsource_REDHAT
access.redhat.comsecurity/cve/CVE-2026-19550Vulnerability database, x_refsource_REDHAT, Mitigation, Vendor advisory
bugzilla.redhat.comRHBZ#2514019Issue tracking, x_refsource_REDHAT, Issue tracking, Vendor advisory
access.redhat.comsecurity/cve/CVE-2026-18147Vulnerability database, x_refsource_REDHAT
bugzilla.redhat.comRHBZ#2508181Issue tracking, x_refsource_REDHAT
access.redhat.comsecurity/cve/CVE-2026-76578Vulnerability database, x_refsource_REDHAT

Changes to this CVE

Who changed this CVE and when: NVD (analysis, affected products, CVSS), the CVE publisher (CNA) and additional providers such as CISA (ADP).

05.11.2026Record modifiedRed Hat

1 individual change: Affected versions (publisher)

Show the original change

Individual changes of this event as published by NVD
Type	Action	Before	After
Affected versions (publisher)	added	—	Affected value modified. <a href="https://github.com/CVEProject/cvelistV5/blob/main/cves/2026/76xxx/CVE-2026-76578.json">CVE-2026-76578</a>

Source identifier: secalert@redhat.com

02.11.2026Record modifiedRed Hat

New references:

https://access.redhat.com/errata/RHSA-2026:93452

Show 2 original changes

Individual changes of this event as published by NVD
Type	Action	Before	After
Affected versions (publisher)	added	—	Affected value modified. <a href="https://github.com/CVEProject/cvelistV5/blob/main/cves/2026/76xxx/CVE-2026-76578.json">CVE-2026-76578</a>
Reference	added	—	https://access.redhat.com/errata/RHSA-2026:93452

Source identifier: secalert@redhat.com

30.10.2026Record modifiedRed Hat

New references:

https://access.redhat.com/errata/RHSA-2026:93071

Show 2 original changes

Individual changes of this event as published by NVD
Type	Action	Before	After
Affected versions (publisher)	added	—	Affected value modified. <a href="https://github.com/CVEProject/cvelistV5/blob/main/cves/2026/76xxx/CVE-2026-76578.json">CVE-2026-76578</a>
Reference	added	—	https://access.redhat.com/errata/RHSA-2026:93071

Source identifier: secalert@redhat.com

26.10.2026Record modifiedRed Hat

New references:

https://access.redhat.com/errata/RHSA-2026:89836

Show 2 original changes

Individual changes of this event as published by NVD
Type	Action	Before	After
Affected versions (publisher)	added	—	Affected value modified. <a href="https://github.com/CVEProject/cvelistV5/blob/main/cves/2026/76xxx/CVE-2026-76578.json">CVE-2026-76578</a>
Reference	added	—	https://access.redhat.com/errata/RHSA-2026:89836

Source identifier: secalert@redhat.com

15.10.2026Record modifiedRed Hat

New references:

Show 3 original changes

Individual changes of this event as published by NVD
Type	Action	Before	After
Affected versions (publisher)	added	—	Affected value modified. <a href="https://github.com/CVEProject/cvelistV5/blob/main/cves/2026/76xxx/CVE-2026-76578.json">CVE-2026-76578</a>
Reference	added	—	https://access.redhat.com/errata/RHSA-2026:83460
Reference	added	—	https://access.redhat.com/errata/RHSA-2026:83461

Source identifier: secalert@redhat.com

Show 7 older changes

14.10.2026Record modifiedRed Hat

New references:

https://access.redhat.com/errata/RHSA-2026:83084

Show 2 original changes

Individual changes of this event as published by NVD
Type	Action	Before	After
Affected versions (publisher)	added	—	Affected value modified. <a href="https://github.com/CVEProject/cvelistV5/blob/main/cves/2026/76xxx/CVE-2026-76578.json">CVE-2026-76578</a>
Reference	added	—	https://access.redhat.com/errata/RHSA-2026:83084

Source identifier: secalert@redhat.com

14.10.2026Record modifiedRed Hat

New references:

Show 3 original changes

Individual changes of this event as published by NVD
Type	Action	Before	After
Affected versions (publisher)	added	—	Affected value modified. <a href="https://github.com/CVEProject/cvelistV5/blob/main/cves/2026/76xxx/CVE-2026-76578.json">CVE-2026-76578</a>
Reference	added	—	https://access.redhat.com/errata/RHSA-2026:83083
Reference	added	—	https://access.redhat.com/errata/RHSA-2026:83085

Source identifier: secalert@redhat.com

14.10.2026Record modifiedRed Hat

New references:

https://access.redhat.com/errata/RHSA-2026:82935

Show 2 original changes

Individual changes of this event as published by NVD
Type	Action	Before	After
Affected versions (publisher)	added	—	Affected value modified. <a href="https://github.com/CVEProject/cvelistV5/blob/main/cves/2026/76xxx/CVE-2026-76578.json">CVE-2026-76578</a>
Reference	added	—	https://access.redhat.com/errata/RHSA-2026:82935

Source identifier: secalert@redhat.com

28.09.2026Record modifiedRed Hat

New references:

https://access.redhat.com/errata/RHSA-2026:72279

Show 2 original changes

Individual changes of this event as published by NVD
Type	Action	Before	After
Affected versions (publisher)	added	—	Affected value modified. <a href="https://github.com/CVEProject/cvelistV5/blob/main/cves/2026/76xxx/CVE-2026-76578.json">CVE-2026-76578</a>
Reference	added	—	https://access.redhat.com/errata/RHSA-2026:72279

Source identifier: secalert@redhat.com

24.09.2026Record modifiedRed Hat

New references:

https://access.redhat.com/errata/RHSA-2026:70564

Show 2 original changes

Individual changes of this event as published by NVD
Type	Action	Before	After
Affected versions (publisher)	added	—	Affected value modified. <a href="https://github.com/CVEProject/cvelistV5/blob/main/cves/2026/76xxx/CVE-2026-76578.json">CVE-2026-76578</a>
Reference	added	—	https://access.redhat.com/errata/RHSA-2026:70564

Source identifier: secalert@redhat.com

08.09.2026Record modifiedCISA ADP

CISA assessment (SSVC): exploitation: none known, automatable: yes

Show the original change

Individual changes of this event as published by NVD
Type	Action	Before	After
SSVC assessment	added	—	{"id":"CVE-2026-76578","role":"CISA Coordinator","options":[{"exploitation":"none"},{"automatable":"yes"},{"technicalImpact":"total"}],"version":"2.0.3","timestamp":"2026-09-08T13:58:12.782701Z"}

Source identifier: 134c704f-9b21-4f2e-91b3-4a467353bcc0

07.09.2026ReceivedRed Hat

CVSS V3.1: AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

Weakness type: CWE-306

Description added or changed

New references:

Show 6 original changes

Individual changes of this event as published by NVD
Type	Action	Before	After
Description	added	—	A flaw was found in FreeIPA. The self-managed OTP token ACI does not require authentication and does not restrict which attributes may be added alongside the token entry. An unauthenticated LDAP client can exploit this, combined with a related flaw in the underlying directory server's ACI evaluation (tracked separately), to create an arbitrary attacker-controlled Kerberos principal and have it added to the administrators group. This allows a remote, unauthenticated attacker to obtain genuine FreeIPA administrator-group membership and perform administrative operations against the directory and, on SID-enabled deployments, other IdM services.
CVSS	added	—	AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Weakness type (CWE)	added	—	CWE-306
Affected versions (publisher)	added	—	New affected value received. <a href="https://github.com/CVEProject/cvelistV5/blob/main/cves/2026/76xxx/CVE-2026-76578.json">CVE-2026-76578</a>
Reference	added	—	https://access.redhat.com/security/cve/CVE-2026-76578
Reference	added	—	https://bugzilla.redhat.com/show_bug.cgi?id=2519522

Source identifier: secalert@redhat.com

Linked CVEs

Linked CVEs

High	CVE-2026-79678	Red Hat Enterprise Linux: Eval Injection	8.1	—
Critical	CVE-2026-76578	Red Hat Enterprise Linux: Missing Authentication for Critical Function	9.8	—
High	CVE-2026-73198	Ipa: freeipa: unauthenticated dos in `/ipa/i18n_messages` via unbounded request body read	7.5	—
High	CVE-2026-73197	Ipa: freeipa: unauthenticated dos in `/ipa/migration/migration.py` via unbounded request body read	7.5	—
High	CVE-2026-19550	Red Hat Enterprise Linux: Incorrect Authorization	8.2	—
High	CVE-2026-18147	Red Hat Enterprise Linux: Cross-site Scripting	8.1	—
High	CVE-2026-13097	Red Hat Enterprise Linux: Use of Incorrectly-Resolved Name or Reference	8.7	—
Critical	CVE-2026-11861	Freeipa: idm: ipa: freeipa: obtaining tgs with impersonating cname through trust relationships	9.6	—

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<a href="https://intel.neosec.eu/en/cve/CVE-2026-76578"><img src="https://intel.neosec.eu/badge/cve/CVE-2026-76578.svg?lang=en" alt="CVE-2026-76578 – NEOSEC Intel" height="20"></a>