What is CVE-2017-2909?

CVE-2017-2909 is a high-severity vulnerability in Cesanta Mongoose, classified under Loop with Unreachable Exit Condition (Infinite Loop). CVSS score: 7.5/10. Published 2017-11-07.

How severe is CVE-2017-2909?

High severity. CVSS v3 base score is 7.5 out of 10.

Vulnerability in Cesanta Mongoose

CVE-2017-2909

An infinite loop programming error exists in the DNS server functionality of Cesanta Mongoose 6.8 library. A specially crafted DNS request can cause an infinite loop resulting in high CPU usage and Denial Of Service. An attacker can send a packet over the network to trigger this vulnerability.

Published 2017-11-07 · last modified 2026-06-17.

CVSS v3 metric

CVSS v3 base score 7.5 (High). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H.

EPSS exploit prediction

EPSS: 0.014 (71.9th percentile), scored 2026-09-29.

Low probability of exploitation in the next 30 days, but still tracked. 72nd percentile — 71.9% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS over last 30 days · oldest: 0.014 · newest: 0.014 · change: 0.000

Affected products

Cesanta Mongoose — versions 6.8

Weakness classification (CWE)

CWE-835 — Loop with Unreachable Exit Condition (Infinite Loop)

References

www.talosintelligence.com/vulnerability_reports/TALOS-2017-0416 (Technical Description, Third Party Advisory)

Frequently asked questions

What is CVE-2017-2909?: CVE-2017-2909 is a high-severity vulnerability in Cesanta Mongoose, classified under Loop with Unreachable Exit Condition (Infinite Loop). CVSS score: 7.5/10. Published 2017-11-07.
How severe is CVE-2017-2909?: High severity. CVSS v3 base score is 7.5 out of 10.