CVE-2014-8155

GnuTLS before 2.9.10 does not verify the activation and expiration dates of CA certificates, which allows man-in-the-middle attackers to spoof servers via a certificate issued by a CA certificate that is (1) not yet valid or (2) no longer valid.

Published: 2015-08-14 Last update: 2026-06-16 Assigner: [email protected] Source: [email protected]
NVD Status：Modified，CVE State: published
View at NVD, CVE.org, EUVD

CVE-2014-8155 is rated Low Risk (38.8/100): CVSS Medium severity, with medium exploitation likelihood (EPSS 1.05%). 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-2014-8155

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% 1.05% +0.76%
2 2025-07-13 0.21% 0.29% +0.08%
3 2025-07-12 — 0.21% —

Full EPSS history (11 records total)

Common vulnerability scoring system (CVSS) metrics for CVE-2014-8155

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-2014-8155

OS Trackers for CVE-2014-8155

vendor priority summary link
debian unimportant CVE-2014-8155 unimportant priority: Debian including 1 source packages (gnutls28), 5 status rows across 5 suites (bookworm, bullseye, forky, sid, trixie): resolved 5. https://security-tracker.debian.org/tracker/CVE-2014-8155
redhat medium — https://access.redhat.com/security/cve/CVE-2014-8155
ubuntu low CVE-2014-8155 low priority: Ubuntu including 2 source packages (gnutls26, gnutls28), 10 status rows across 5 suites (lucid, precise, trusty, upstream, utopic): not-affected 6, DNE 2, released 2. https://ubuntu.com/security/CVE-2014-8155

Affected software / configurations for CVE-2014-8155

Vendor Product Version Raw CPE
gnu gnutls <= 2.9.9 cpe:2.3:a:gnu:gnutls:*:*:*:*:*:*:*:*

References for CVE-2014-8155

cvelogic Threat Intelligence