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CVE-2011-2166

21
FAUCET Score

CVE-2011-2166 describes a vulnerability in Dovecot 2.0.x before 2.0.13 where the script-login component fails to adhere to configured user and group settings. This flaw could allow authenticated remote users to bypass intended access restrictions by exploiting a script. With a CVSS score of 6.5, this vulnerability is moderately severe, requiring authentication (Au:S) and potentially leading to partial compromise of confidentiality, integrity, and availability (C:P/I:P/A:P). There is no known active exploitation, publicly available exploit code (Metasploit, Nuclei, ExploitDB), or significant community discussion or media coverage surrounding this CVE.

Impacted Technologies

VendorProductVersion(s)CPE
2.0.0CPE matchmatch criteria
cpe:2.3:a:dovecot:dovecot:2.0.0:*:*:*:*:*:*:*
2.0.1CPE matchmatch criteria
cpe:2.3:a:dovecot:dovecot:2.0.1:*:*:*:*:*:*:*
2.0.2CPE matchmatch criteria
cpe:2.3:a:dovecot:dovecot:2.0.2:*:*:*:*:*:*:*
2.0.3CPE matchmatch criteria
cpe:2.3:a:dovecot:dovecot:2.0.3:*:*:*:*:*:*:*
2.0.4CPE matchmatch criteria
cpe:2.3:a:dovecot:dovecot:2.0.4:*:*:*:*:*:*:*

CVSS Data

CVSS version used by this source: 2.0

6.5MEDIUM

AV:N/AC:L/Au:S/C:P/I:P/A:P

Confidentiality Impact
PARTIAL
Integrity Impact
PARTIAL
Availability Impact
PARTIAL
Access Vector
NETWORK
Access Complexity
LOW
Authentication
SINGLE
Exploitability Score
8.0
Impact Score
6.4
CvssVersion
2.0

Exploit Intelligence

EPSS Score
2.01%
Probability of exploitation in next 30 days
EPSS Percentile
78.8%
Percentile rank of EPSS score among Peer Group
As of 2026-07-27
Model: v2026.06.15
This CVE's current EPSS score of 0.0201 is in the 91st percentile among its peer group of 21,958 CVEs.

Social Chatter

The average CVE in this peer group has 0.0 Twitter, 0.0 Reddit, 0.1 Bluesky, 0.0 Mastodon, and 0.1 GitHub mentions.

Media Mentions

No media coverage found for this CVE.

The average CVE in this peer group has 0.0 InfoSec Media, 0.0 Vendor Blog, and 0.0 Security Researcher mentions.

Remediation

Patch Available

Vendor Patches (1)

redhatpatch availablevia redhat_api
Product: Red Hat Enterprise Linux 6Fixed in: dovecot-1:2.0.9-5.el6
View patch

Vendor Advisories (1)

redhatCVE-2011-2166Low

dovecot: authenticated remote bypass of intended access restrictions

May 11, 2011

References

dovecot.org / pipermail/dovecot/2011-May/059085.html
Patch
openwall.com / lists/oss-security/2011/05/18/4
Patch
rhn.redhat.com / errata/RHSA-2013-0520.html
secunia.com / advisories/52311
exchange.xforce.ibmcloud.com / vulnerabilities/67675
dovecot.org / doc/NEWS-2.0
securityfocus.com / bid/48003