How severe is CVE-2009-5140?

CVE-2009-5140 has a CVSS 3.x base score of 8.8, rated high severity. It is exploitable over network with low attack complexity, requires no privileges and user interaction. Impact on confidentiality is high, integrity high, and availability high.

Is CVE-2009-5140 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (68th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2009-5140?

CVE-2009-5140 affects Linksys Spa2102 Firmware. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2009-5140?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its high severity, prioritise patching exposed systems.

When was CVE-2009-5140 published?

CVE-2009-5140 was published on 2020-02-12 and last updated on 2026-06-16.

CVE-2009-5140

CVE-2009-5140 is a high-severity vulnerability in Linksys Spa2102 Firmware with a CVSS 3.x base score of 8.8. It is not currently listed as actively exploited by CISA, and its EPSS exploit-prediction score is low. The underlying weakness is classified as CWE-307.

Key facts

Severity: High (CVSS 3.x base score 8.8)
CVSS v2: 4.3
EPSS exploit prediction: 1% (68th percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-307
Affected product: Linksys Spa2102 Firmware
Published: 2020-02-12
Last modified: 2026-06-16

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.

Frequently asked questions

What is CVE-2009-5140?: 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.
How severe is CVE-2009-5140?: CVE-2009-5140 has a CVSS 3.x base score of 8.8, rated high severity. It is exploitable over network with low attack complexity, requires no privileges and user interaction. Impact on confidentiality is high, integrity high, and availability high.
Is CVE-2009-5140 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (68th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2009-5140?: CVE-2009-5140 affects Linksys Spa2102 Firmware. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2009-5140?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its high severity, prioritise patching exposed systems.
When was CVE-2009-5140 published?: CVE-2009-5140 was published on 2020-02-12 and last updated on 2026-06-16.

References

Affected products (1)

cpe:2.3:o:linksys:spa2102_firmware:-:*:*:*:*:*:*:*

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