CVE-2007-6591

KDE Konqueror 3.5.5 and 3.95.00, when a user accepts an SSL server certificate on the basis of the CN domain name in the DN field, regards the certificate as also accepted for all domain names in subjectAltName:dNSName fields, even though these fields cannot be examined in the product, which makes it easier for remote attackers to trick a user into accepting an invalid certificate for a spoofed web site.

Published: 2007-12-28 Last update: 2026-04-23 Assigner: [email protected] Source: [email protected]
NVD Status：Modified，CVE State: published
View at NVD, CVE.org, EUVD

CVE-2007-6591 is rated Low Risk (36.1/100): CVSS Medium severity, with medium exploitation likelihood (EPSS 0.82%). 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-2007-6591

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 0.29% 0.82% +0.53%
2 2026-04-12 0.16% 0.29% +0.13%
3 2025-03-30 — 0.16% —

Full EPSS history (11 records total)

Common vulnerability scoring system (CVSS) metrics for CVE-2007-6591

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:P/I:N/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:P)
Partial confidentiality impact.
Integrity impact (I:N)
No integrity impact.
Availability impact (A:N)
No availability impact.
 8.6 2.9 [email protected]

Weakness enumeration for CVE-2007-6591

OS Trackers for CVE-2007-6591

vendor priority summary link
redhat low — https://access.redhat.com/security/cve/CVE-2007-6591
ubuntu low CVE-2007-6591 low priority: Ubuntu including 1 source packages (kdebase), 9 status rows across 9 suites (dapper, edgy, feisty, gutsy, hardy, intrepid, jaunty, karmic, upstream): ignored 5, not-affected 3, needs-triage 1. https://ubuntu.com/security/CVE-2007-6591

Vendor comments (NVD) for CVE-2007-6591

  • Red Hat (2008-01-10T00:00:00)

    Red Hat is aware of this issue and is tracking it via the following bug: https://bugzilla.redhat.com/bugzilla/show_bug.cgi?id=CVE-2007-6591 The Red Hat Security Response Team has rated this issue as having low security impact, a future update may address this flaw. More information regarding issue severity can be found here: http://www.redhat.com/security/updates/classification/#low

Affected software / configurations for CVE-2007-6591

Vendor Product Version Raw CPE
kde konqueror 3.5.5 cpe:2.3:a:kde:konqueror:3.5.5:*:*:*:*:*:*:*
kde konqueror 3.95.00 cpe:2.3:a:kde:konqueror:3.95.00:*:*:*:*:*:*:*

References for CVE-2007-6591

cvelogic Threat Intelligence