CVE-2026-57201 Asterisk - Buffer Overflow

Asterisk < 20.20.1, 21.12.3, 22.10.1, 23.4.1 and Certified Asterisk < 20.7-cert11, 22.8-cert3 contain a stack buffer overflow caused by unbounded vsprintf in H.323 ooTrace() trace-logging function, letting remote attackers cause a crash, exploit requires chan_ooh323 addon compiled and publicly reachable port.

CVSS base score 7.5 /10
High
CISA KEV
Not listed
Public exploit
None known
EPSS
0.70% chance of exploitation in 30 days
View the NVD record ↗

Details

Type
Buffer Overflow
Impact
Denial Of Service
CVSS vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
Published
27 October 2026
Updated
29 October 2026
Weakness
CWE-787

Vendor fix

Update to versions 20.20.1, 21.12.3, 22.10.1, 23.4.1 or Certified Asterisk 20.7-cert11, 22.8-cert3 or later.

Patching closes this CVE. It does not tell you which of your systems run the affected version, or what else is exposed alongside them.

References

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