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CVE-2009-5140

27
FAUCET Score

CVE-2009-5140 describes a "SIP Digest Leak" vulnerability in the Linksys SPA2102 phone adapter. This flaw allows remote attackers to obtain hashed credentials from an invalid authentication challenge, facilitating brute-force attacks. With a CVSS score of 8.8 (High), the vulnerability is easily exploitable over the network with low complexity, potentially leading to high impact on confidentiality, integrity, and availability. While there is no evidence of active exploitation, nor publicly available exploit code in Metasploit or ExploitDB, the vulnerability has received some community discussion.

Impacted Technologies

VendorProductVersion(s)CPE
Range not provided by sourceCPE matchmatch criteria
cpe:2.3:o:linksys:spa2102_firmware:-:*:*:*:*:*:*:*

CVSS Data

CVSS version used by this source: 3.1

8.8HIGH

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

Attack Vector
NETWORK
Attack Complexity
LOW
Privileges Required
NONE
User Interaction
REQUIRED
Scope
UNCHANGED
Confidentiality Impact
HIGH
Integrity Impact
HIGH
Availability Impact
HIGH
Exploitability Score
2.8
Impact Score
5.9
CvssVersion
3.1

Exploit Intelligence

EPSS Score
1.36%
Probability of exploitation in next 30 days
EPSS Percentile
68.9%
Percentile rank of EPSS score among Peer Group
As of 2026-07-27
Model: v2026.06.15
This CVE's current EPSS score of 0.0136 is in the 68th percentile among its peer group of 14,855 CVEs.

Social Chatter

The average CVE in this peer group has 0.0 Twitter, 0.1 Reddit, 0.2 Bluesky, 0.1 Mastodon, and 0.2 GitHub mentions.

Media Mentions

No media coverage found for this CVE.

The average CVE in this peer group has 0.3 InfoSec Media, 0.0 Vendor Blog, and 0.1 Security Researcher mentions.

Remediation

Remediation records are not available for this CVE.

References

resources.enablesecurity.com / resources/sipdigestleak-tut.pdf
Mailing ListThird Party Advisory
voipsa.org / pipermail/voipsec_voipsa.org/2009-April/002946.html
Mailing ListThird Party Advisory