CVE•Published 2026-02-23•Modified 2026-04-29•0 articles on news•5 live references•NVD data

CVE-2026-2967Cesanta · Mongoose

Vulnerability data via NVD (ingested)

CVSS v3.1

3.7

LOW

CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:L

EPSS percentile

Exploit Prediction Scoring System · top 55% of all CVEs

Weaknesses (CWE)

CWE-940Improper Verification of Source of a Communication Channel

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.

Timeline

Published 2026-02-23

Modified 2026-04-29

External references

NVD MITRE Exploit-DB Sploitus VulnCheck

Search for exposed instances

Shodan + Censys queries derived from NVD's CPE data. The vuln tag catches assets Shodan has explicitly linked to this CVE; the product / banner fingerprints find exposed instances even when the vuln tag was never applied (which is common).

Shodan · vuln tag0 hosts

vuln:CVE-2026-2967

Hosts Shodan has explicitly fingerprinted as vulnerable.

Shodan · product

product:"Cesanta Mongoose"

All exposed Cesanta Mongoose instances — cross-reference with the CVE's affected-version range.

Shodan · banner/body mention

http.html:"Mongoose"

HTTP body or banner mentions "Mongoose" — catches deploys Shodan didn't identify as a product.

More intel sources (5)

Shodan report

vuln:CVE-2026-2967