High severity7.5NVD Advisory· Published Feb 18, 2021· Updated Jun 17, 2026
CVE-2021-26712
CVE-2021-26712
Description
Incorrect access controls in res_srtp.c in Sangoma Asterisk 13.38.1, 16.16.0, 17.9.1, and 18.2.0 and Certified Asterisk 16.8-cert5 allow a remote unauthenticated attacker to prematurely terminate secure calls by replaying SRTP packets.
AI Insight
LLM-synthesized narrative grounded in this CVE's description and references.
Affected products
17cpe:2.3:a:digium:certified_asterisk:16.8:-:*:*:*:*:*:*+ 12 more
- cpe:2.3:a:digium:certified_asterisk:16.8:-:*:*:*:*:*:*
- cpe:2.3:a:digium:certified_asterisk:16.8:cert1-rc1:*:*:*:*:*:*
- cpe:2.3:a:digium:certified_asterisk:16.8:cert1-rc2:*:*:*:*:*:*
- cpe:2.3:a:digium:certified_asterisk:16.8:cert1-rc3:*:*:*:*:*:*
- cpe:2.3:a:digium:certified_asterisk:16.8:cert1-rc4:*:*:*:*:*:*
- cpe:2.3:a:digium:certified_asterisk:16.8:cert2:*:*:*:*:*:*
- cpe:2.3:a:digium:certified_asterisk:16.8:cert3:*:*:*:*:*:*
- cpe:2.3:a:digium:certified_asterisk:16.8:cert4-rc1:*:*:*:*:*:*
- cpe:2.3:a:digium:certified_asterisk:16.8:cert4-rc2:*:*:*:*:*:*
- cpe:2.3:a:digium:certified_asterisk:16.8:cert4-rc3:*:*:*:*:*:*
- cpe:2.3:a:digium:certified_asterisk:16.8:cert4-rc4:*:*:*:*:*:*
- cpe:2.3:a:digium:certified_asterisk:16.8:cert4:*:*:*:*:*:*
- cpe:2.3:a:digium:certified_asterisk:16.8:cert5:*:*:*:*:*:*
- Sangoma/Asteriskdescription
- Range: 16.8-cert5
Patches
Vulnerability mechanics
References
5- issues.asterisk.org/jira/browse/ASTERISK-29260nvdIssue TrackingPatchVendor Advisory
- packetstormsecurity.com/files/161473/Asterisk-Project-Security-Advisory-AST-2021-003.htmlnvdThird Party Advisory
- seclists.org/fulldisclosure/2021/Feb/59nvdMailing ListThird Party Advisory
- downloads.asterisk.org/pub/security/nvdVendor Advisory
- downloads.asterisk.org/pub/security/AST-2021-003.htmlnvdVendor Advisory
News mentions
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