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Back to active CVEs
Medium ยท CVSS 6.9CVE-2026-57193

Asterisk: LDAP Filter Injection in res_config_ldap via SIP Username (Unauthenticated Information Disclosure)CVE-2026-57193

Answer in brief

CVE-2026-57193 records a Medium severity (CVSS 6.9) vulnerability in Asterisk: LDAP Filter Injection in res_config_ldap via SIP Username (Unauthenticated Information Disclosure). The current sources do not mark it as known exploited. The current feed maps asterisk/asterisk (generic), asterisk/certified-asterisk (generic). Check affected ranges and fixed versions before updating.

Analysis pending evidence review

HOL Guard separates source facts from reviewed analysis. See the methodology.

Published Oct 26, 2026Updated Oct 26, 2026Source checked Oct 26, 2026First seen by HOL Oct 26, 2026Material review Oct 26, 2026
Upstream Advisory

Key facts

Risk
Medium ยท CVSS 6.9
Exploitation
Not marked as known exploited
Affected software
2 mapped packages or products
Fix availability
Available

Why this deserves its current priority

CVSS is 6.9. The current sources do not mark it as known exploited. Treat this as a source-backed prioritization signal, not a statement about your environment.

Analysis status

Analysis pending evidence review

Factual feed record only; HOL analysis is not approved for indexing. Read the methodology.

Affected scope and exposure questions

The current feed maps asterisk/asterisk (generic), asterisk/certified-asterisk (generic). Check affected ranges and fixed versions before updating.

Mapped affected packages and fixed versions
PackageAffected rangeFixed version
asterisk/asteriskgeneric<20.20.1 || >=21.0.0-pre1 <21.12.3 || >=22.0.0-pre1 <22.10.1 || >=23.0.0-pre1 <23.4.120.20.1, 21.12.3, 22.10.1, 23.4.1
asterisk/certified-asteriskgeneric<20.7-cert11 || >=22.8-cert1-pre1 <22.8-cert320.7-cert11, 22.8-cert3

Recommended response

  1. 1Check inventory. Check lockfiles and deployed manifests for asterisk/asterisk, asterisk/certified-asterisk.
  2. 2Review the reported fix. Update asterisk/asterisk to 20.20.1; asterisk/certified-asterisk to 20.7-cert11 if you use the affected versions. Test the change in a non-production environment first.

Evidence timeline and material changes

  1. Published upstream

    Oct 26, 2026

    Evidence: source:cvelist:source_dates:source-dates:record

  2. Source modified

    Oct 26, 2026

    Evidence: source:cvelist:source_dates:source-dates:record

  3. First seen by HOL

    Oct 26, 2026

Sources and claim methodology

  • GitHub security advisorygithub.com
  • GitHub security advisorygithub.com
  • GitHub security advisorygithub.com
  • GitHub security advisorygithub.com
  • GitHub security advisorygithub.com
  • GitHub security advisorygithub.com
  • GitHub security advisorygithub.com
  • GitHub security advisorygithub.com
  • GitHub security advisorygithub.com
  • GitHub security advisorygithub.com
  • GitHub security advisorygithub.com
  • GitHub security advisorygithub.com
  • GitHub security advisorygithub.com
  • GitHub security advisorygithub.com
  • GitHub security advisorygithub.com
Upstream source 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.

Quoted source text, attributed separately from HOL analysis.

Related CVEs

  • Asterisk: Out-of-Bounds Read in Q.931 Information Element Parser (H.323 Addon)Same asterisk/asterisk package
  • Asterisk: Heap-use-after-free in Asterisk PJSIP TCP/SDP handling when TCP connection closes during SDP processingSame asterisk/asterisk package
  • Asterisk: Reflected XSS in Phone Provisioning HTTP Error PagesSame asterisk/asterisk package

Record context

Vulnerability class
Missing Auth
EPSS
Not reported
CWE IDs
CWE-943
Source
CVE List V5
Source checked
Oct 26, 2026
References
15 linked sources
Open source record