Cisco: Improper Check or Handling of Exceptional Conditions (CVE-2026-76481)
Published Last modified Sources: Cisco PSIRT, BSI, CVE.org
What is affected, what to do
As part of Cisco's ongoing commitment to proactive security and product quality, engineering teams for Cisco Emergency Responder, Cisco Prime Collaboration Deployment, Cisco Unified Communications Manager (Unified CM), Cisco Unified Communications Manager IM & Presence Service (Unified CM IM&P), Cisco Unified Communications Manager Session Management Edition (Unified CM SME), and Cisco Unity Connection have conducted a comprehensive internal security review. This review resulted in software hardening releases that address multiple internally discovered vulnerabilities.
The available sources name no fixed version. Check the vendor guidance in the references below.
- Affected
- Cisco Emergency Responder
eq 14..14 - Cisco Emergency Responder
eq 14SU1..14SU1 - Cisco Emergency Responder
eq 14SU2..14SU2 - Cisco Emergency Responder
eq 14SU3..14SU3 - Cisco Emergency Responder
eq 14SU3a..14SU3a - Cisco Emergency Responder
eq 15..15 - Cisco Emergency Responder
eq 15SU1..15SU1 - Cisco Emergency Responder
eq 15SU1a..15SU1a - Cisco Emergency Responder
eq 14SU4..14SU4 - Cisco Emergency Responder
eq 15SU2..15SU2 - Cisco Emergency Responder
eq 15SU3..15SU3 - Cisco Emergency Responder
eq 14SU5..14SU5 - Cisco Emergency Responder
eq 15SU4..15SU4 - Cisco Emergency Responder
eq 14SU6..14SU6 - Cisco Unified Communications Manager
eq 14..14 - Cisco Unified Communications Manager
eq 14SU1..14SU1 - Cisco Unified Communications Manager
eq 14SU2..14SU2 - Cisco Unified Communications Manager
eq 14SU3..14SU3 - Cisco Unified Communications Manager
eq 15..15 - Cisco Unified Communications Manager
eq 15SU1..15SU1 - Cisco Unified Communications Manager
eq 14SU4..14SU4 - Cisco Unified Communications Manager
eq 14SU4a..14SU4a - Cisco Unified Communications Manager
eq 15SU1a..15SU1a - Cisco Unified Communications Manager
eq 15SU2..15SU2 - Cisco Unified Communications Manager
eq 15.0.1.13010-1..15.0.1.13010-1 - Cisco Unified Communications Manager
eq 15.0.1.13011-1..15.0.1.13011-1 - Cisco Unified Communications Manager
eq 15.0.1.13012-1..15.0.1.13012-1 - Cisco Unified Communications Manager
eq 15.0.1.13013-1..15.0.1.13013-1 - Cisco Unified Communications Manager
eq 15.0.1.13014-1..15.0.1.13014-1 - Cisco Unified Communications Manager
eq 15.0.1.13015-1..15.0.1.13015-1 - Cisco Unified Communications Manager
eq 15.0.1.13016-1..15.0.1.13016-1 - Cisco Unified Communications Manager
eq 15.0.1.13017-1..15.0.1.13017-1 - Cisco Unified Communications Manager
eq 15SU3a..15SU3a - Cisco Unified Communications Manager
eq 14SU5..14SU5 - Cisco Unified Communications Manager
eq 15SU4..15SU4 - Cisco Unified Communications Manager
eq 15SU4a..15SU4a - Cisco Unified Communications Manager
eq 14SU6..14SU6 - Cisco Unified Communications Manager IM and Presence Service
eq 14..14 - Cisco Unified Communications Manager IM and Presence Service
eq 14SU1..14SU1 - Cisco Unified Communications Manager IM and Presence Service
eq 14SU2..14SU2 - Cisco Unified Communications Manager IM and Presence Service
eq 14SU2a..14SU2a - Cisco Unified Communications Manager IM and Presence Service
eq 14SU3..14SU3 - Cisco Unified Communications Manager IM and Presence Service
eq 15..15 - Cisco Unified Communications Manager IM and Presence Service
eq 15SU1..15SU1 - Cisco Unified Communications Manager IM and Presence Service
eq 14SU4..14SU4 - Cisco Unified Communications Manager IM and Presence Service
eq 15SU2..15SU2 - Cisco Unified Communications Manager IM and Presence Service
eq 15SU3..15SU3 - Cisco Unified Communications Manager IM and Presence Service
eq 14SU5..14SU5 - Cisco Unified Communications Manager IM and Presence Service
eq 15SU4..15SU4 - Cisco Unified Communications Manager IM and Presence Service
eq 14SU6..14SU6 - Cisco Unity Connection
eq 14..14 - Cisco Unity Connection
eq 14SU1..14SU1 - Cisco Unity Connection
eq 14SU2..14SU2 - Cisco Unity Connection
eq 14SU3..14SU3 - Cisco Unity Connection
eq 14SU3a..14SU3a - Cisco Unity Connection
eq 15..15 - Cisco Unity Connection
eq 15SU1..15SU1 - Cisco Unity Connection
eq 14SU4..14SU4 - Cisco Unity Connection
eq 15SU2..15SU2 - Cisco Unity Connection
eq 15SU3..15SU3 - Cisco Unity Connection
eq 14SU5..14SU5 - Cisco Unity Connection
eq 15SU4..15SU4 - Cisco Unity Connection
eq 14SU6..14SU6
- Cisco Emergency Responder
Not sure whether and how you are affected? Ask a question about this vulnerability
Metrics
7.5
Priority
XIEM Effective CVSS: highest available CVSS rating from NVD and vendor data.
Source: Vendor (CNA), CVSS v3
7.5
CVSS v3
Severity High on the scale from 0 to 10.
Source: Cisco PSIRT, BSI, CVE.org
0.5 %
EPSS score
Low — model estimates < 1% exploitation likelihood.
Source: FIRST EPSS, percentile 39.3
Show all metrics
- Severity
- High
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- 79.86 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- 7.5 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- 7.5
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- 0.5 %
- Low — model estimates < 1% 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- 39.3
- 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
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-703
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
As part of Cisco's ongoing commitment to proactive security and product quality, engineering teams for Cisco Emergency Responder, Cisco Prime Collaboration Deployment, Cisco Unified Communications Manager (Unified CM), Cisco Unified Communications Manager IM & Presence Service (Unified CM IM&P), Cisco Unified Communications Manager Session Management Edition (Unified CM SME), and Cisco Unity Connection have conducted a comprehensive internal security review. This review resulted in software hardening releases that address multiple internally discovered vulnerabilities. The vulnerabilities tracked by CVE-2026-76481 are related to issues concerning improper handling of exceptional conditions that are grouped under the Common Weakness Enumeration (CWE) Pillar CWE-703.
Source: cisco_csaf, BSI CSAF, BSI WID Portal, NVD (NIST), cvelistv5, CVE.org (MITRE)
Affected products
The following versions are affected. Older releases of the same product line are also vulnerable unless stated otherwise.
| Affected versions | Fixed in | ||
|---|---|---|---|
| Cisco | Cisco Emergency Responder |
|
|
| Cisco | Cisco Unified Communications Manager |
|
|
| Cisco | Cisco Unified Communications Manager IM and Presence Service |
|
|
Vendors and products
Weakness classes (CWE)
CWE-703Improper Check or Handling of Exceptional Conditions
Pillar
The product does not properly anticipate or handle exceptional conditions that rarely occur during normal operation of the product.
Entry at MITRE CWE-703
References & sources
- sec.cloudapps.cisco.comcisco-sa-voice-hardening-twgbH9e3
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).
Record 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-2026-76481","role":"CISA Coordinator","options":[{"exploitation":"none"},{"automatable":"yes"},{"technicalImpact":"partial"}],"version":"2.0.3","timestamp":"2026-10-21T16:39:40.405292Z"}Source identifier: 134c704f-9b21-4f2e-91b3-4a467353bcc0
Linked advisories
Embed badge
Show the severity and KEV status of this vulnerability on your site – with a link back here. The image is updated hourly.
<a href="https://intel.neosec.eu/en/cve/CVE-2026-76481"><img src="https://intel.neosec.eu/badge/cve/CVE-2026-76481.svg?lang=en" alt="CVE-2026-76481 – NEOSEC Intel" height="20"></a>