Buffer overflow in Irontec Sngrep
CVE-2026-90558
sngrep through 1.8.4 contains stack buffer overflow vulnerabilities in SIP attribute formatting routines when header values exceed the 255-byte buffer limit. Attackers can craft malicious SIP packets with oversized Call-ID, X-Call-ID, or other header fields to overflow stack buffers and cause crashes or execute arbitrary code during packet parsing and rendering.
Vulnerability class: Buffer Overflow
Published · last modified .
CVSS v3 metric
CVSS v3 base score 9.8 (Critical). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H.
EPSS exploit prediction
EPSS: 0.009 (58.9th percentile), scored .
Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 59th percentile — 58.9% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.009 · newest: 0.009 · change: 0.000
Affected products
Weakness classification (CWE)
References
- github.com/irontec/sngrep (product)
- github.com/irontec/sngrep/blob/v1.8.4/src/sip_call.c (technical-description)
- github.com/irontec/sngrep/blob/v1.8.4/src/sip_msg.c (technical-description)
- github.com/irontec/sngrep/commit/1ff74ee3ab5ff280e8ba976aa8c744dca57eb35b (patch)
- www.vulncheck.com/advisories/sngrep-through-1.8.4-stack-buffer-overflow-via-sip… (third-party-advisory)
Frequently asked questions
- What is CVE-2026-90558?
- CVE-2026-90558 is a critical-severity vulnerability in Irontec Sngrep, classified under Stack-based Buffer Overflow. CVSS score: 9.8/10. Published 2026-09-12.
- How severe is CVE-2026-90558?
- Critical severity. CVSS v3 base score is 9.8 out of 10.