Is CVE-2011-4091 being actively exploited?

CVE-2011-4091 is not currently listed in the CISA Known Exploited Vulnerabilities (KEV) catalog.

What is the CVSS score for CVE-2011-4091?

CVE-2011-4091 has a CVSS 2.0 base score of 5.0 (MEDIUM).

CVE-2011-4091

MEDIUM · CVSS 5.0EPSS 2.7%EU EUVD

The libobby server in inc/server.hpp in libnet6 (aka net6) before 1.3.14 does not perform authentication before checking the user name, which allows remote attackers to obtain sensitive information such as server-usage patterns by a particular user and color preferences.

Key facts

CVSS score: 5.0 (v2.0)
Severity: MEDIUM
CVSS vector: AV:N/AC:L/Au:N/C:P/I:N/A:N
Weakness (CWE): CWE-287
EPSS score: 2.7% (86th percentile)
In CISA KEV: No
In EU EUVD: Yes (EUVD-2011-4042)
Published: February 10, 2014
NVD last modified: June 16, 2026
Status: Modified

EU Vulnerability Database (EUVD)

This vulnerability is also tracked by ENISA as EUVD-2011-4042 in the EU Vulnerability Database. Last updated in EUVD on August 6, 2024.

View on the EU Vulnerability Database

Affected products

armin burgmeier / net6
armin burgmeier / net6
armin burgmeier / net6
armin burgmeier / net6
armin burgmeier / net6
armin burgmeier / net6
armin burgmeier / net6
armin burgmeier / net6
armin burgmeier / net6
armin burgmeier / net6
armin burgmeier / net6
armin burgmeier / net6
armin burgmeier / net6
opensuse / opensuse
opensuse / opensuse
oracle / solaris

References

http://git.0x539.de/?p=net6.git%3Ba=commitdiff%3Bh=84afca022f063f89bfcd4bb32b1ee911f555abf1%3Bhp=ac61d7fb42a1f977fb527e024bede319c4a9e169
http://lists.opensuse.org/opensuse-updates/2012-01/msg00044.html(Third Party Advisory)
http://lists.opensuse.org/opensuse-updates/2012-01/msg00054.html(Third Party Advisory)
http://www.openwall.com/lists/oss-security/2011/10/31/1(Mailing List, Third Party Advisory)
http://www.oracle.com/technetwork/topics/security/bulletinapr2015-2511959.html(Third Party Advisory)
https://bugzilla.novell.com/show_bug.cgi?id=727708(Issue Tracking)
https://bugzilla.redhat.com/show_bug.cgi?id=750632(Issue Tracking)

Last updated September 17, 2026 · Source: NVD, CISA KEV, FIRST.org EPSS

Query CVEs from your AI assistant

The CVE/NVD Explorer brain answers CVE questions directly inside Claude, ChatGPT, or any MCP assistant — always up to date, no setup. Add it once and stop pasting advisories into chat.

Add the CVE brain