CVE-2026-121943
Medium
Description
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.
SeverityMedium
CVSS4.8
Exploit probability—
ProductIrontec Sngrep
PublishedNov 4, 2026
First seenNov 4, 2026
Weakness typeCWE-170CWE-170
How to fix
Sources list no fixed version or patch link for this vulnerability.
Affected products
| Product | Affected versions | Fixed in |
|---|---|---|
| Irontec sngrep | v ≤ 1.9.0 | — |
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