CVE-2011-2940

stunnel 4.40 and 4.41 might allow remote attackers to execute arbitrary code or cause a denial of service (heap memory corruption) via unspecified vectors.

Published: 2011-08-25 Last update: 2026-04-29 Assigner: [email protected] Source: [email protected]
NVD Status：Modified，CVE State: published
View at NVD, CVE.org, EUVD

CVE-2011-2940 is rated High Risk (73.4/100): CVSS Critical severity, with high exploitation likelihood (EPSS 15.84%, 95th percentile). EPSS ranks this CVE among the most likely to be exploited in the near term. EPSS rose +3.08% over the last day, indicating growing attacker interest. High exploitation likelihood—assess exposure and prioritize remediation.

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-2011-2940

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 2026-02-24 12.76% 15.84% +3.08%
2 2025-03-30 31.09% 12.76% -18.33%
3 2025-03-29 — 31.09% —

Full EPSS history (10 records total)

Common vulnerability scoring system (CVSS) metrics for CVE-2011-2940

CVSS metrics for this CVE.

Base score Version Severity Vector Exploitability Impact Score source
9.3 2.0 HIGH
AV:N/AC:M/Au:N/C:C/I:C/A:C 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:C)
Complete confidentiality impact.
Integrity impact (I:C)
Complete integrity impact.
Availability impact (A:C)
Complete availability impact.
 8.6 10.0 [email protected]

Weakness enumeration for CVE-2011-2940

OS Trackers for CVE-2011-2940

vendor priority summary link
debian not yet assigned CVE-2011-2940 not yet assigned priority: Debian including 1 source packages (stunnel4), 4 status rows across 4 suites (bookworm, bullseye, sid, trixie): resolved 4. https://security-tracker.debian.org/tracker/CVE-2011-2940
gentoo normal CVE-2011-2940: 1 GLSA(s) (201202-08), 1 atom(s) (net-misc/stunnel); latest impact normal. https://bugs.gentoo.org/buglist.cgi?quicksearch=CVE-2011-2940
redhat high — https://access.redhat.com/security/cve/CVE-2011-2940
suse critical CVE-2011-2940 severity critical: SUSE including 7 source package names (stunnel, stunnel-5.38-1.1, …), 21 product×package rows across 19 product lines (SUSE CaaS Platform 4.0, SUSE Enterprise Storage 6, … (19 product lines)): Known Not Affected 14, Fixed 7. https://www.suse.com/security/cve/CVE-2011-2940/
ubuntu medium CVE-2011-2940 medium priority: Ubuntu including 1 source packages (stunnel4), 5 status rows across 5 suites (hardy, lucid, maverick, natty, upstream): not-affected 4, released 1. https://ubuntu.com/security/CVE-2011-2940

Affected software / configurations for CVE-2011-2940

Vendor Product Version Raw CPE
stunnel stunnel 4.40 cpe:2.3:a:stunnel:stunnel:4.40:*:*:*:*:*:*:*
stunnel stunnel 4.41 cpe:2.3:a:stunnel:stunnel:4.41:*:*:*:*:*:*:*

References for CVE-2011-2940

cvelogic Threat Intelligence