How severe is CVE-2005-4839?

CVE-2005-4839 has a CVSS 2.0 base score of 5.0, rated medium severity.

Is CVE-2005-4839 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (42nd percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2005-4839?

CVE-2005-4839 affects Claymore Systems Inc Puretls. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2005-4839?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.

When was CVE-2005-4839 published?

CVE-2005-4839 was published on 2005-12-31 and last updated on 2026-06-16.

CVE-2005-4839

CVE-2005-4839 is a medium-severity vulnerability in Claymore Systems Inc Puretls with a CVSS 2.0 base score of 5.0. It is not currently listed as actively exploited by CISA, and its EPSS exploit-prediction score is low.

Key facts

Severity: Medium (CVSS 2.0 base score 5.0)
EPSS exploit prediction: 1% (42nd percentile)
Actively exploited: Not listed in CISA KEV
Affected product: Claymore Systems Inc Puretls
Published: 2005-12-31
Last modified: 2026-06-16

Description

PureTLS before 0.9b5 does not clear optional Extensions and Algorithm.Parameters values before parsing, which might trigger an information leak of values from earlier certificates.

Frequently asked questions

What is CVE-2005-4839?: PureTLS before 0.9b5 does not clear optional Extensions and Algorithm.Parameters values before parsing, which might trigger an information leak of values from earlier certificates.
How severe is CVE-2005-4839?: CVE-2005-4839 has a CVSS 2.0 base score of 5.0, rated medium severity.
Is CVE-2005-4839 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (42nd percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2005-4839?: CVE-2005-4839 affects Claymore Systems Inc Puretls. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2005-4839?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.
When was CVE-2005-4839 published?: CVE-2005-4839 was published on 2005-12-31 and last updated on 2026-06-16.

References

Affected products (1)

cpe:2.3:a:claymore_systems_inc:puretls:*:*:*:*:*:*:*:*

More vulnerabilities in Claymore Systems Inc Puretls

CVE-2002-0420 — High (CVSS 7.5): Vulnerability in PureTLS before 0.9b2 related to injection attacks, which could possibly allow remote attackers to…

All CVEs affecting Claymore Systems Inc Puretls →