CVE-2026-2967
A security vulnerability has been detected in Cesanta Mongoose up to 7.20.
Does this matter?
Lower severity and a low EPSS score (0.49%). Track it; it rarely justifies an emergency change on its own.
Description
A security vulnerability has been detected in Cesanta Mongoose up to 7.20. This affects the function getpeer of the file /src/net_builtin.c of the component TCP Sequence Number Handler. The manipulation leads to improper verification of source of a communication channel. The attack may be initiated remotely. The attack's complexity is rated as high. The exploitability is reported as difficult. The exploit has been disclosed publicly and may be used. The vendor was contacted early about this disclosure but did not respond in any way.
- CVSS 4.0
- 2.9 LOWCVSS:4.0/AV:N/AC:H/AT:N/PR:N/UI:N/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N/E:P/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/M
- EPSS
- 0.49% probability · 41th percentile
- CISA KEV
- Not listed
- Weakness
- CWE-940
- Affected
- cesanta/mongoose
- Source
- cna@vuldb.com
References
- https://github.com/dwBruijn/CVEs/blob/main/Mongoose/tcp_rst.mdExploit, Third Party Advisory
- https://github.com/dwBruijn/CVEs/blob/main/Mongoose/tcp_rst.md#pocExploit, Third Party Advisory
- https://vuldb.com/?ctiid.347334Permissions Required, VDB Entry
- https://vuldb.com/?id.347334Third Party Advisory, VDB Entry
- https://vuldb.com/?submit.755450Third Party Advisory, VDB Entry
Source: NVD record, EPSS from FIRST.org, KEV from CISA. Refreshed daily.