How severe is CVE-2011-2701?

CVE-2011-2701 has a CVSS 2.0 base score of 5.8, rated medium severity.

Is CVE-2011-2701 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 2% (77th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2011-2701?

CVE-2011-2701 affects Freeradius. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2011-2701?

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

When was CVE-2011-2701 published?

CVE-2011-2701 was published on 2011-08-04 and last updated on 2026-06-16.

CVE-2011-2701

CVE-2011-2701 is a medium-severity vulnerability in Freeradius with a CVSS 2.0 base score of 5.8. 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-287.

Key facts

Severity: Medium (CVSS 2.0 base score 5.8)
EPSS exploit prediction: 2% (77th percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-287
Affected product: Freeradius
Published: 2011-08-04
Last modified: 2026-06-16

Description

The ocsp_check function in rlm_eap_tls.c in FreeRADIUS 2.1.11, when OCSP is enabled, does not properly parse replies from OCSP responders, which allows remote attackers to bypass authentication by using the EAP-TLS protocol with a revoked X.509 client certificate.

Frequently asked questions

What is CVE-2011-2701?: The ocsp_check function in rlm_eap_tls.c in FreeRADIUS 2.1.11, when OCSP is enabled, does not properly parse replies from OCSP responders, which allows remote attackers to bypass authentication by using the EAP-TLS protocol with a revoked X.509 client certificate.
How severe is CVE-2011-2701?: CVE-2011-2701 has a CVSS 2.0 base score of 5.8, rated medium severity.
Is CVE-2011-2701 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 2% (77th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2011-2701?: CVE-2011-2701 affects Freeradius. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2011-2701?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.
When was CVE-2011-2701 published?: CVE-2011-2701 was published on 2011-08-04 and last updated on 2026-06-16.

References

Affected products (1)

cpe:2.3:a:freeradius:freeradius:2.1.11:*:*:*:*:*:*:*

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