CVE-2011-5121

CVE-2011-5121 is a critical-severity vulnerability in Comodo Comodo Internet Security with a CVSS 2.0 base score of 10.0. 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-310.

Key facts

Description

The Antivirus component in Comodo Internet Security before 5.3.175888.1227 does not properly check whether unspecified X.509 certificates are revoked, which has unknown impact and remote attack vectors.

Frequently asked questions

What is CVE-2011-5121?
The Antivirus component in Comodo Internet Security before 5.3.175888.1227 does not properly check whether unspecified X.509 certificates are revoked, which has unknown impact and remote attack vectors.
How severe is CVE-2011-5121?
CVE-2011-5121 has a CVSS 2.0 base score of 10.0, rated critical severity.
Is CVE-2011-5121 being actively exploited?
It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (65th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2011-5121?
CVE-2011-5121 primarily affects Comodo Comodo Internet Security. In total, 30 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.
How do I fix CVE-2011-5121?
Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its critical severity, prioritise patching exposed systems.
When was CVE-2011-5121 published?
CVE-2011-5121 was published on 2012-08-26 and last updated on 2026-06-16.

References

Affected products (30)

More vulnerabilities in Comodo Comodo Internet Security

All CVEs affecting Comodo Comodo Internet Security →

Other CWE-310 (Cryptographic Issues) vulnerabilities

Browse all CWE-310 (Cryptographic Issues) vulnerabilities →