Is CVE-2011-0199 in the CISA KEV catalog?

No. CVE-2011-0199 is not currently on the CISA Known Exploited Vulnerabilities list.

What is the CVSS severity of CVE-2011-0199?

CVE-2011-0199 has a CVSS v3 base score of 5.9 (MEDIUM).

What is the EPSS score for CVE-2011-0199?

CVE-2011-0199 has an EPSS score of 0.75% (51th percentile), estimating the probability of exploitation in the next 30 days.

How do I fix CVE-2011-0199?

Upgrade mac os x to 10.6.8 or later. Fixes are available for 2 affected products.

CVE & CISA-KEV Catalog

CVE-2011-0199

MEDIUM

5.9

CVSS v3

NVD

Description

The Certificate Trust Policy component in Apple Mac OS X before 10.6.8 does not perform CRL checking for Extended Validation (EV) certificates that lack OCSP URLs, which might allow man-in-the-middle attackers to spoof an SSL server via a revoked certificate.

CWE-295Improper Certificate Validation

How to fix

Remediation Available

mac os xNVD

Affected:>= 10.6.0, < 10.6.8Fixed in:10.6.8CVE-2011-0199derived from NVD

mac os x serverNVD

Affected:>= 10.6.0, < 10.6.8Fixed in:10.6.8CVE-2011-0199derived from NVD

Remediation is compiled from vendor and distribution security advisories. Always confirm against the linked source for your exact version and platform.

CVSS v3 Vector

Exploitability

Attack VectorNetwork

Attack ComplexityHigh

Privileges RequiredNone

User InteractionNone

ScopeUnchanged

Impact

ConfidentialityNone

IntegrityHigh

AvailabilityNone

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

Exploit Intelligence

0.75%probability of exploitation in 30 days

51stpercentile

Moderate risk: more likely to be exploited than 51% of all known CVEs.

References

Patch2

Third-Party Advisory1

securityfocus.com

Related Vulnerabilities

Other CWE-295 (Improper Certificate Validation) vulnerabilities, ordered by exploit likelihood. View all

CVE	Severity	CVSS	EPSS	Exploited	Fix
CVE-2015-4000	Low	3.7	100%	-	Fix
CVE-2020-0601	High	8.1	89%	KEV	Fix
CVE-2009-3555	Critical	9.8	87%	-	Fix
CVE-2022-26923	High	8.8	83%	KEV	Fix
CVE-2023-27823	Critical	9.8	53%	-	-
CVE-2022-42979	High	8.8	24%	-	-

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This product uses NVD data but is not endorsed or certified by the NVD. EPSS scores courtesy of FIRST.org (https://www.first.org/epss). Source: CISA KEV Catalog. Data as of 2026-04-29.