CVE-2026-90778
Medium
Elevated severity or exploit probability.
CVSS base
7.5
HIGH
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
EPSS — probability of exploitation (30 days)
0.9%
56.6th percentile
CISA KEV
Not listed
Weakness / dates
CWE-120
Published 2026-09-13 · modified 2026-09-23
Description
SIPp through 3.7.7 contains a buffer overflow vulnerability in get_peer_tag() function when processing SIP To headers with tag parameters of 2049 bytes or more. Unauthenticated remote attackers can send crafted SIP messages with oversized tag parameters to overflow the static buffer and crash the process.
References
- https://github.com/SIPp/sipp
- https://github.com/SIPp/sipp/blob/v3.7.7/src/sip_parser.cpp#L76-L113
- https://github.com/SIPp/sipp/commit/ddf22d1a54e0396b2e18ebaf4cf5a3fa860e5da4
- https://github.com/SIPp/sipp/pull/879
- https://www.vulncheck.com/advisories/sipp-through-3.7.7-buffer-overflow-via-sip-to-header-tag