CVE-2009-5140

Name: CVE-2009-5140
Creator: NVD / NIST
Published: 2020-02-12T14:15:10.62+00:00
License: https://creativecommons.org/publicdomain/zero/1.0/

HIGHCVSS 8.8/10EPSS 1.36%

Last modified Jun 16, 2026

CVE-2009-5140 is a high-severity vulnerability rated 8.8/10 on the CVSS scale. The SIP implementation on the Linksys SPA2102 phone adapter 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.. EPSS estimates a 1.36% chance of exploitation in the next 30 days.

Description

The SIP implementation on the Linksys SPA2102 phone adapter 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.

Metrics

CVSS 3.1

8.8/10

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

EPSS Probability

1.36%

68.2th percentile

Probability of exploitation in the next 30 days. Learn more

Weakness Enumeration

CWE-307

Affected Software

Vendor	Product	Versions
Linksys	Spa2102 Firmware	All versions

References

http://voipsa.org/pipermail/voipsec_voipsa.org/2009-April/002946.htmlMailing List, Third Party Advisory
https://resources.enablesecurity.com/resources/sipdigestleak-tut.pdfMailing List, Third Party Advisory
http://voipsa.org/pipermail/voipsec_voipsa.org/2009-April/002946.htmlMailing List, Third Party Advisory
https://resources.enablesecurity.com/resources/sipdigestleak-tut.pdfMailing List, Third Party Advisory

Timeline

Published: Feb 12, 2020
Last Modified: Jun 16, 2026
Status: Modified

Frequently Asked Questions

What is CVE-2009-5140?

How severe is CVE-2009-5140?

CVE-2009-5140 has a CVSS score of 8.8/10 (HIGH severity). The EPSS model estimates a 1.36% probability of exploitation in the next 30 days.

How do I fix CVE-2009-5140?

Check the vendor references and advisories linked above for patched versions and mitigation guidance. You can also run a Strix scan to test if your systems are affected.

Are you affected by CVE-2009-5140?

Run a free Strix scan to check your systems for this vulnerability.

Scan your code now

Source: NVD / NIST