CVE-2026-90558 sngrep - Buffer Overflow

sngrep <= 1.8.4 contains a stack buffer overflow caused by improper handling of oversized SIP header values in attribute formatting routines, letting attackers execute arbitrary code or cause crashes during packet parsing.

CVSS base score 9.8 /10
Critical
CISA KEV
Not listed
Public exploit
None known
Authentication
Not required
EPSS
0.88% chance of exploitation in 30 days
View the NVD record ↗

Details

Type
Buffer Overflow
Impact
Remote Code Execution, Denial Of Service
CVSS vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Published
12 September 2026
Updated
15 October 2026
Weakness
CWE-121

Vendor fix

Update to the latest version beyond 1.8.4.

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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