CVE-2026-2967
LOWDescription
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.
How to fix
TridentStack Control can deploy fixes like this automatically across your Windows, macOS, and Linux fleet. See how it works
Remediation is compiled from vendor and distribution security advisories. Always confirm against the linked source for your exact version and platform.
CVSS v3 Vector
Exploitability
Impact
CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:L
Exploit Intelligence
Moderate risk: more likely to be exploited than 47% of all known CVEs.
References
Related Vulnerabilities
Other CWE-940 vulnerabilities, ordered by exploit likelihood. View all
| CVE | Severity | CVSS | EPSS | Exploited | Fix |
|---|---|---|---|---|---|
| CVE-2025-61932 | Critical | 9.8 | 2.8% | KEV | Fix |
| CVE-2026-102117 | High | 7.2 | 1.3% | - | Fix |
| CVE-2024-32388 | Medium | 5.3 | 1.2% | - | Fix |
| CVE-2023-48387 | High | 8.8 | 1.0% | - | - |
| CVE-2025-23018 | Medium | 5.4 | 1.0% | - | - |
| CVE-2023-3663 | High | 8.8 | 1.0% | - | Fix |
Common questions
How do I fix CVE-2026-2967?
Upgrade swupdate on debian unstable to 2025.12+dfsg-10 or later.
Is CVE-2026-2967 being actively exploited?
Not that we know of. CVE-2026-2967 is not in the CISA Known Exploited Vulnerabilities catalog. Its EPSS score of 0.57% is the estimated probability that it will be exploited in the next 30 days. That is higher than 47% of all scored CVEs.
How severe is CVE-2026-2967?
CVE-2026-2967 has a CVSS v3 base score of 3.7, rated low. CVSS rates the technical impact if the vulnerability is exploited, not how likely that is, so weigh it alongside the exploit-prediction score when you decide what to patch first.
What does CVE-2026-2967 affect?
Published advisories record a fix for swupdate (Debian). Only products with a sourced advisory are listed, so treat this as what we can cite rather than a complete inventory.
Embed a live status badge for CVE-2026-2967
Markdown
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This product uses NVD data but is not endorsed or certified by the NVD. EPSS scores courtesy of FIRST.org (https://www.first.org/epss). Source: CISA KEV Catalog. Data as of 2026-04-29.