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CVE-2009-5140

• Severity: high (CVSS 8.8 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 1.4% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2020-02-12 · updated 2026-06-16
• Weakness: CWE-307

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.

Affected products

• Linksys Spa2102 Firmware: all versions

References

• http://voipsa.org/pipermail/voipsec_voipsa.org/2009-April/002946.html
• https://resources.enablesecurity.com/resources/sipdigestleak-tut.pdf
• http://voipsa.org/pipermail/voipsec_voipsa.org/2009-April/002946.html
• https://resources.enablesecurity.com/resources/sipdigestleak-tut.pdf

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