Vulnerability in Cesanta Mongoose
CVE-2026-2966
A weakness has been identified in Cesanta Mongoose up to 7.20. The impacted element is the function mg_sendnsreq of the file /src/dns.c of the component DNS Transaction ID Handler. Executing a manipulation of the argument random can lead t…
Vulnerability class: POODLE (CVE-2014-3566)
EPSS: 0.002 (37.6th percentile) — read the EPSS interpretation.
CVSS v3 metric
CVSS v3 base score 3.7 (Low). Vector: CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:L/A:N.
Affected products
- Cesanta Mongoose — versions 7.0, 7.1, 7.2
Weakness classification (CWE)
References
- VDB-347333 | Cesanta Mongoose DNS Transaction ID dns.c mg_sendnsreq random values (technical-description, Third Party Advisory, VDB Entry, vdb-entry)
- VDB-347333 | CTI Indicators (IOB, IOC, TTP, IOA) (signature, Permissions Required, permissions-required, VDB Entry)
- Submit #755304 | Cesanta Mongoose Embedded Web Server 7.20 Insufficiently Random Values (Third Party Advisory, VDB Entry, third-party-advisory)
- cna@vuldb.com (related, Exploit, Third Party Advisory)
- cna@vuldb.com (Exploit, Third Party Advisory, exploit)
Frequently asked questions
- What is CVE-2026-2966?
- CVE-2026-2966 is a low-severity vulnerability in Cesanta Mongoose, classified under Cryptographic Issues. CVSS score: 3.7/10. Published 2026-02-23.
- How severe is CVE-2026-2966?
- Low severity. CVSS v3 base score is 3.7 out of 10.