🔐 CVE Alert

CVE-2026-57201

HIGH 7.5

Asterisk: Stack Buffer Overflow in H.323 ooTrace() via Unbounded vsprintf into Fixed 2048-byte Buffer

CVSS Score
7.5
EPSS Score
0.0%
EPSS Percentile
0th

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, a stack buffer overflow in the H.323 `ooTrace()` trace-logging function can occur when unbounded `vsprintf` writes into a fixed `2048-byte buffer`. A remote attacker may send a carefully crafted packet that causes the Asterisk process to crash. The `chan_ooh323` addon channel driver must be explicitly compiled and installed, which is not the default, and its port must be publicly reachable. 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.

CWE CWE-787
Vendor asterisk
Product asterisk
Published Oct 27, 2026
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CVSS v3 Breakdown

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
Attack Vector
Network
Attack Complexity
Low
Privileges Required
None
User Interaction
None
Scope
Unchanged
Confidentiality
None
Integrity
None
Availability
High

Affected Versions

asterisk / asterisk
< 20.20.1 >= 21.0.0-pre1, < 21.12.3 >= 22.0.0-pre1, < 22.10.1 >= 23.0.0-pre1, < 23.4.1
asterisk / certified-asterisk
< 20.7-cert11 >= 22.8-cert1-pre1, < 22.8-cert3

References

NVD ↗ CVE.org ↗ EPSS Data ↗
github.com: https://github.com/asterisk/asterisk/security/advisories/GHSA-x348-j6c9-77f3 github.com: https://github.com/asterisk/asterisk/commit/2d7b8c8dc13d9ead8b6f36cc38b6dd91cd4abd3a github.com: https://github.com/asterisk/asterisk/commit/33f62e351642edd9c58ef97b0002132722546af9 github.com: https://github.com/asterisk/asterisk/commit/875ac7413de0b7068cd12d0da2f140cd06ba9357 github.com: https://github.com/asterisk/asterisk/commit/ac0a64dec6d4231bf005a68da6af3e02bb311634 github.com: https://github.com/asterisk/asterisk/commit/bf0c9a906892bc0f91fa753476e326919e4e30e5 github.com: https://github.com/asterisk/asterisk/commit/c4d9b4defe83f74523880fd630c02c49683786a3 github.com: https://github.com/asterisk/asterisk/commit/fff256d0539e96f70ac315844d72e9d540f03a4c github.com: https://github.com/asterisk/asterisk/releases/tag/20.20.1 github.com: https://github.com/asterisk/asterisk/releases/tag/21.12.3 github.com: https://github.com/asterisk/asterisk/releases/tag/22.10.1 github.com: https://github.com/asterisk/asterisk/releases/tag/23.4.1 github.com: https://github.com/asterisk/asterisk/releases/tag/certified-20.7-cert11 github.com: https://github.com/asterisk/asterisk/releases/tag/certified-22.8-cert3 github.com: https://github.com/asterisk/asterisk/tree/24.0.0-pre1