MediumCVE-2026-57193

    asterisk: Improper Neutralization of Special Elements in Data Query Logic (CVE-2026-57193)

    Published Sources: BSI

    What is affected, what to do

    Asterisk is an open source private branch exchange and telephony toolkit. Prior to Asterisk 20.20.1, 21.12.3, 22.10.1, 23.4.1 and Certified Asterisk 20.7-cert11, 22.8-cert3, the LDAP realtime driver `res_config_ldap` may permit `LDAP filter injection` through a `SIP username`, allowing an unauthenticated attacker to make arbitrary LDAP queries using carefully crafted SIP packets and disclose information.

    Update Asterisk to version 20.20.1, Asterisk Certified-asterisk to version 20.7-cert11.

    Affected
    • Asterisk gte 21.0.0-pre1, < 21.12.3..*
    • Asterisk lt *..20.20.1
    • Asterisk Certified-asterisk gte 22.8-cert1-pre1, < 22.8-cert3..*
    • Asterisk Certified-asterisk lt *..20.7-cert11
    Fixed in
    • Asterisk 20.20.1
    • Asterisk Certified-asterisk 20.7-cert11

    Not sure whether and how you are affected? Ask a question about this vulnerability

    Metrics

    6.9

    Priority

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

    Source: Vendor (CNA), CVSS v4

    6.9

    CVSS v4

    Severity Medium on the scale from 0 to 10.

    Source: BSI

    2.0 %

    EPSS score

    Moderate — model estimates 1-10% exploitation likelihood.

    Source: FIRST EPSS, percentile 80.2

    Show all metrics
    Severity
    Medium
    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
    91.98 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
    6.9 Methodology
    CVSS v4

    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
    6.9
    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
    2.0 %
    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
    80.2
    Critical — this CVE ranks in the top fifth of all CVEs scored today (rank ≥ 80%).
    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-943

    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
    Handle the vulnerability in regular vulnerability handling under Art. 21(2)(e) NIS2.
    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

    Asterisk is an open source private branch exchange and telephony toolkit. Prior to Asterisk 20.20.1, 21.12.3, 22.10.1, 23.4.1 and Certified Asterisk 20.7-cert11, 22.8-cert3, the LDAP realtime driver `res_config_ldap` may permit `LDAP filter injection` through a `SIP username`, allowing an unauthenticated attacker to make arbitrary LDAP queries using carefully crafted SIP packets and disclose information. The `res_config_ldap` module must be loaded and configured to access an LDAP server, which is not the default. This issue is fixed in Asterisk 20.20.1, 21.12.3, 22.10.1, 23.4.1 and Certified Asterisk 20.7-cert11, 22.8-cert3.

    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 versionsFixed in
    asteriskasterisk
    • ≥ 21.0.0-pre1, < 21.12.3
    • < 20.20.1
    • —
    • 20.20.1
    asteriskcertified-asterisk
    • ≥ 22.8-cert1-pre1, < 22.8-cert3
    • < 20.7-cert11
    • —
    • 20.7-cert11
    certified-asteriskcertified-asterisk
    • ≥ 22.8-cert1-pre1, < 22.8-cert3
    • —
    DigiumCertified Asterisk
    • < 20.7-cert11
    • < 22.8-cert3
    • 20.7-cert11
    • 22.8-cert3
    Open SourceAsterisk
    • < 20.20.1
    • < 21.12.3
    • < 22.10.1
    • < 23.4.1
    • 20.20.1
    • 21.12.3
    • 22.10.1
    • 23.4.1

    Vendors and products

    Weakness classes (CWE)

    • CWE-943Improper Neutralization of Special Elements in Data Query Logic

      Class

      The product generates a query intended to access or manipulate data in a data store such as a database, but it does not neutralize or incorrectly neutralizes special elements that can modify the intended logic of the query.

      Entry at MITRE CWE-943

    References & sources

    • github.comasterisk/asterisk/security/advisories/GHSA-8jhw-m2hg-vp3hx_refsource_CONFIRM
    • github.comasterisk/asterisk/commit/0a2c1d9e910f7c4dfffa05e328accb8a96990d…x_refsource_MISC
    • github.comasterisk/asterisk/commit/0e6d761ed83f1671632c91805252767eae85e1…x_refsource_MISC
    • github.comasterisk/asterisk/commit/1cf189549994e0898954c814ce5a023cd969f1…x_refsource_MISC
    • github.comasterisk/asterisk/commit/29026ece6fdd1834bb8f49c013ef163745ff2b…x_refsource_MISC
    • github.comasterisk/asterisk/commit/336ebe762bf6dfaf279796700de8ab51f7acd2…x_refsource_MISC
    • github.comasterisk/asterisk/commit/ccec146953b5e13043a36663af84e5a50ca633…x_refsource_MISC
    • github.comasterisk/asterisk/commit/dbcf38933866f0ddd023bc1814a78d4c750b08…x_refsource_MISC
    • github.comasterisk/asterisk/releases/tag/20.20.1x_refsource_MISC
    • github.comasterisk/asterisk/releases/tag/21.12.3x_refsource_MISC
    • github.comasterisk/asterisk/releases/tag/22.10.1x_refsource_MISC
    • github.comasterisk/asterisk/releases/tag/23.4.1x_refsource_MISC
    • github.comasterisk/asterisk/releases/tag/certified-20.7-cert11x_refsource_MISC
    • github.comasterisk/asterisk/releases/tag/certified-22.8-cert3x_refsource_MISC
    • github.comasterisk/asterisk/tree/24.0.0-pre1x_refsource_MISC
    • github.comasterisk/asterisk/security/advisories/GHSA-q9fr-m7g8-6ph5x_refsource_CONFIRM
    • github.comasterisk/asterisk/commit/15c66022dc441ec63d7bd5f53cf7f35db72964…x_refsource_MISC
    • github.comasterisk/asterisk/commit/38a2059eb77a91a6b6e76eeba5875c2b960273…x_refsource_MISC
    • github.comasterisk/asterisk/commit/59b74276f24ba104d859f3f05897c9b8d835a2…x_refsource_MISC
    • github.comasterisk/asterisk/commit/60f4ef3deac6b9af30519b46c13f103264038b…x_refsource_MISC

    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).

    1. ReceivedGitHub

      CVSS V4.0: AV:N/AC:L/AT:N/PR:N/UI:N/VC:L/VI:N/VA:N/SC:N/SI:N/SA:N

      Weakness type: CWE-943

      Description added or changed

      Show 19 original changes
      Individual changes of this event as published by NVD
      TypeActionBeforeAfter
      Descriptionadded
      —
      Asterisk is an open source private branch exchange and telephony toolkit. Prior to Asterisk 20.20.1, 21.12.3, 22.10.1, 23.4.1 and Certified Asterisk 20.7-cert11, 22.8-cert3, the LDAP realtime driver `res_config_ldap` may permit `LDAP filter injection` through a `SIP username`, allowing an unauthenticated attacker to make arbitrary LDAP queries using carefully crafted SIP packets and disclose information. The `res_config_ldap` module must be loaded and configured to access an LDAP server, which is not the default. This issue is fixed in Asterisk 20.20.1, 21.12.3, 22.10.1, 23.4.1 and Certified Asterisk 20.7-cert11, 22.8-cert3.
      CVSSadded
      —
      AV:N/AC:L/AT:N/PR:N/UI:N/VC:L/VI:N/VA:N/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X
      Weakness type (CWE)added
      —
      CWE-943
      Affected versions (publisher)added
      —
      New affected value received. <a href="https://github.com/CVEProject/cvelistV5/blob/main/cves/2026/57xxx/CVE-2026-57193.json">CVE-2026-57193</a>
      Referenceadded
      —
      https://github.com/asterisk/asterisk/commit/04aa482212e43b292817444eb4de35499f4b1568
      Referenceadded
      —
      https://github.com/asterisk/asterisk/commit/14968f2f440ea0dd983caa4f477237a5224904dd
      Referenceadded
      —
      https://github.com/asterisk/asterisk/commit/23c01b6d359c5d85da725beea89e394a6c031c5d
      Referenceadded
      —
      https://github.com/asterisk/asterisk/commit/7e1ae09594a101950398cc6aff2dd2e5ab314884
      Referenceadded
      —
      https://github.com/asterisk/asterisk/commit/8170a6bfa75994e7617a8b9d7fe7a7140b70cbe2
      Referenceadded
      —
      https://github.com/asterisk/asterisk/commit/dd0c768d9e9678e4cb1ed95689a254a61452239b
      Referenceadded
      —
      https://github.com/asterisk/asterisk/commit/ef280572a034cac3994075298facb1999778ee0d
      Referenceadded
      —
      https://github.com/asterisk/asterisk/releases/tag/20.20.1
      Referenceadded
      —
      https://github.com/asterisk/asterisk/releases/tag/21.12.3
      Referenceadded
      —
      https://github.com/asterisk/asterisk/releases/tag/22.10.1
      Referenceadded
      —
      https://github.com/asterisk/asterisk/releases/tag/23.4.1
      Referenceadded
      —
      https://github.com/asterisk/asterisk/releases/tag/certified-20.7-cert11
      Referenceadded
      —
      https://github.com/asterisk/asterisk/releases/tag/certified-22.8-cert3
      Referenceadded
      —
      https://github.com/asterisk/asterisk/security/advisories/GHSA-r6c2-hwc2-j4mp
      Referenceadded
      —
      https://github.com/asterisk/asterisk/tree/24.0.0-pre1

      Source identifier: security-advisories@github.com

    Linked CVEs

    Linked CVEs
    HighCVE-2026-57202Asterisk: ARI setChannelVar bypasses live_dangerously and permits FILE() writes8.1—
    HighCVE-2026-57201Asterisk: Out-of-bounds Write7.5—
    HighCVE-2026-57200Asterisk: Path Traversal7.5—
    LowCVE-2026-57199Asterisk: Asterisk app_sms.c copies externally controlled SMS lengths into fixed in-struct buffers——
    HighCVE-2026-57197Asterisk: Heap Buffer Overflow in OGG/Speex File Playback (format_ogg_speex)——
    LowCVE-2026-57196Asterisk: Reflected XSS in Phone Provisioning HTTP Error Pages——
    MediumCVE-2026-57193Asterisk: Improper Neutralization of Special Elements in Data Query Logic——
    MediumCVE-2026-57192Asterisk: Out-of-Bounds Write in Codec2 Decoder Due to Floor/Ceil Sample Count Mismatch——
    HighCVE-2026-57190Asterisk: SQL Injection in cel_pgsql and cel_tds via CELGenUserEvent eventtype Field——
    LowCVE-2026-57189Asterisk: Possible RED T.140 Generation Accumulation OOB Write——
    HighCVE-2026-57188Asterisk: Stack buffer overflow in res_xmpp XMPP namespace prefix handling——
    HighCVE-2026-57186Asterisk: CVE-2022-37325 fix is absent from current chan_ooh323 Q.931 party-number parser7.5—
    MediumCVE-2026-57185Asterisk: Buffer over-read in Asterisk PJSIP MWI body parser6.5—
    MediumCVE-2026-57184Asterisk: Out-of-Bounds Read in Q.931 Information Element Parser (H.323 Addon)——
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