What is CVE-2009-5139?

CVE-2009-5139 is a high-severity vulnerability in Google Gizmo5, classified under Use of Password Hash With Insufficient Computational Effort. CVSS score: 7.5/10. Published 2020-02-12.

How severe is CVE-2009-5139?

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

Vulnerability in Google Gizmo5

CVE-2009-5139

The SIP implementation on the Gizmo5 software phone provides hashed credentials in a response to an invalid authentication challenge, which makes it easier for remote attackers to obtain access via a brute-force attack, related to a "SIP Digest Leak" issue.

Published 2020-02-12 · last modified 2026-06-16.

CVSS v3 metric

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

EPSS exploit prediction

EPSS: 0.004 (28.7th percentile), scored 2026-09-29.

Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 29th percentile — 28.7% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS over last 30 days · oldest: 0.004 · newest: 0.004 · change: 0.000

Affected products

Google Gizmo5

Weakness classification (CWE)

CWE-916 — Use of Password Hash With Insufficient Computational Effort

References

resources.enablesecurity.com/resources/sipdigestleak-tut.pdf (Exploit, Third Party Advisory)
voipsa.org/pipermail/voipsec_voipsa.org/2009-April/002946.html (Exploit, Third Party Advisory)

Frequently asked questions

What is CVE-2009-5139?: CVE-2009-5139 is a high-severity vulnerability in Google Gizmo5, classified under Use of Password Hash With Insufficient Computational Effort. CVSS score: 7.5/10. Published 2020-02-12.
How severe is CVE-2009-5139?: High severity. CVSS v3 base score is 7.5 out of 10.