CVE-2011-1094

kio/kio/tcpslavebase.cpp in KDE KSSL in kdelibs before 4.6.1 does not properly verify that the server hostname matches the domain name of the subject of an X.509 certificate, which allows man-in-the-middle attackers to spoof arbitrary SSL servers via a certificate issued by a legitimate Certification Authority for an IP address, a different vulnerability than CVE-2009-2702.

Published: 2011-03-16 Last update: 2026-06-16 Assigner: [email protected] Source: [email protected]
NVD Status：Modified，CVE State: published
View at NVD, CVE.org, EUVD

CVE-2011-1094 is rated Low Risk (37.7/100): CVSS Medium severity, with medium exploitation likelihood (EPSS 1.00%). Monitor for updates and reassess as exploit intelligence or EPSS changes.

Risk is dynamic; we continuously reassess and refresh what is shown on this page as upstream context changes.

Exploit prediction scoring system (EPSS) score for CVE-2011-1094

EPSS lead: Daily EPSS estimates relative likelihood of exploitation; percentile ranks this CVE among scored vulnerabilities (higher = more severe relative rank).

# Date Old EPSS score New EPSS score Delta (New - Old)
1 2026-06-15 0.81% 1.00% +0.19%
2 2025-03-30 0.86% 0.81% -0.05%
3 2025-03-29 — 0.86% —

Full EPSS history (9 records total)

Common vulnerability scoring system (CVSS) metrics for CVE-2011-1094

CVSS metrics for this CVE.

Base score Version Severity Vector Exploitability Impact Score source
4.3 2.0 MEDIUM
AV:N/AC:M/Au:N/C:N/I:P/A:N Click to expand
Access vector (AV:N)
Can be exploited remotely over network reachability.
Access complexity (AC:M)
Exploitation needs some favorable conditions, but not exceptional ones.
Authentication (AU:N)
No authentication is required.
Confidentiality impact (C:N)
No confidentiality impact.
Integrity impact (I:P)
Partial integrity impact.
Availability impact (A:N)
No availability impact.
 8.6 2.9 [email protected]

Weakness enumeration for CVE-2011-1094

OS Trackers for CVE-2011-1094

vendor priority summary link
gentoo normal CVE-2011-1094: 1 GLSA(s) (201406-34), 1 atom(s) (kde-base/kdelibs); latest impact normal. https://bugs.gentoo.org/buglist.cgi?quicksearch=CVE-2011-1094
redhat medium — https://access.redhat.com/security/cve/CVE-2011-1094
ubuntu medium CVE-2011-1094 medium priority: Ubuntu including 2 source packages (kde4libs, kdelibs), 12 status rows across 6 suites (dapper, hardy, karmic, lucid, maverick, upstream): ignored 6, released 3, needs-triage 2, DNE 1. https://ubuntu.com/security/CVE-2011-1094

Affected software / configurations for CVE-2011-1094

Vendor Product Version Raw CPE
redhat kdelibs <= 4.6 cpe:2.3:a:redhat:kdelibs:*:*:*:*:*:*:*:*
redhat kdelibs 3.5.2 cpe:2.3:a:redhat:kdelibs:3.5.2:*:*:*:*:*:*:*
redhat kdelibs 3.5.9 cpe:2.3:a:redhat:kdelibs:3.5.9:*:*:*:*:*:*:*
redhat kdelibs 3.5.10 cpe:2.3:a:redhat:kdelibs:3.5.10:*:*:*:*:*:*:*

References for CVE-2011-1094

cvelogic Threat Intelligence