Vulnerability DatabaseCVE-2021-26712
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CVE-2021-26712
Published:February 18, 2021
Updated:July 21, 2026
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.
Related Resources (7)
https://downloads.asterisk.org/pub/security/AST-2021-003.html
https://issues.asterisk.org/jira/browse/ASTERISK-29260
http://packetstormsecurity.com/files/161473/Asterisk-Project-Security-Advisory-AST-2021-003.html
http://seclists.org/fulldisclosure/2021/Feb/59
https://security.alpinelinux.org/vuln/CVE-2021-26712
https://people.canonical.com/~ubuntu-security/cve/CVE-2021-26712
https://downloads.asterisk.org/pub/security/
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CVSS v4
Base Score:
8.7
Attack Vector
NETWORK
Attack Complexity
LOW
Attack Requirements
NONE
Privileges Required
NONE
User Interaction
NONE
Vulnerable System Confidentiality
NONE
Vulnerable System Integrity
NONE
Vulnerable System Availability
HIGH
Subsequent System Confidentiality
NONE
Subsequent System Integrity
NONE
Subsequent System Availability
NONE
CVSS v3
Base Score:
7.5
Attack Vector
NETWORK
Attack Complexity
LOW
Privileges Required
NONE
User Interaction
NONE
Scope
UNCHANGED
Confidentiality
NONE
Integrity
NONE
Availability
HIGH
EPSS
Base Score:
3.59