CVE-2026-121943 (GCVE-0-2026-121943)
Vulnerability from cvelistv5 – Published: 2026-11-04 12:31 – Updated: 2026-11-04 18:51
VLAI
EPSS
VEX
Title
Irontec sngrep through 1.9.0 Out-of-Bounds Stack Read via sip_check_packet
Summary
Irontec sngrep through 1.9.0 contains an out-of-bounds stack read vulnerability in sip_check_packet and sip_validate_packet caused by an off-by-one length check on 10240-byte SIP payloads. Remote attackers can send a crafted UDP or TCP SIP packet or supply a pcap file to crash sngrep or leak adjacent stack bytes into displayed SIP fields.
Severity
4.8 (Medium)
SSVC
Exploitation: poc
Automatable: no
Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-11-04 18:51 UTC
CWE
- CWE-170 - Improper Null Termination
Assigner
VulnCheck
CNA
References
5 references
| URL | Tags |
|---|---|
| https://github.com/irontec/sngrep/issues/589 | issue-tracking |
| https://hackmd.io/@haindpwn/sngrep-sip-payload-mi… | third-party-advisory |
| https://github.com/irontec/sngrep/blob/v1.9.0/src… | technical-description |
| https://www.vulncheck.com/advisories/irontec-sngr… | third-party-advisory |
| https://hackmd.io/@haindpwn/cve-2026-121943-12194… | exploit |
Impacted products
Date Public
2026-10-21 13:36
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