CVE-2026-90778

HIGH 7.5

SIPp through 3.7.7 Buffer Overflow via SIP To Header Tag

CVSS Score

7.5

EPSS Score

0.0%

EPSS Percentile

0th

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.

CWE	CWE-120
Vendor	sipp
Product	sipp
Published	Sep 13, 2026
Last Updated	Sep 14, 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

SIPp / sipp

0 ≤ 3.7.7

References

NVD ↗ CVE.org ↗ EPSS Data ↗

github.com: https://github.com/SIPp/sipp/pull/879 github.com: https://github.com/SIPp/sipp/commit/ddf22d1a54e0396b2e18ebaf4cf5a3fa860e5da4 github.com: https://github.com/SIPp/sipp/blob/v3.7.7/src/sip_parser.cpp#L76-L113 github.com: https://github.com/SIPp/sipp vulncheck.com: https://www.vulncheck.com/advisories/sipp-through-3.7.7-buffer-overflow-via-sip-to-header-tag

Credits

🔍 Tristan Madani