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CVE-2021-32056

18
FAUCET Score

CVE-2021-32056 is a vulnerability in Cyrus IMAP versions before 3.2.7, and 3.3.x and 3.4.x before 3.4.1, allowing remote authenticated users to bypass access restrictions on server annotations. This medium-severity flaw (CVSS 4.3) has a low impact, primarily causing replication to stall, and requires authentication for exploitation. There is no evidence of active exploitation, public exploit code, or significant community discussion or media coverage.

Impacted Technologies

VendorProductVersion(s)CPE
< 3.2.7CPE matchmatch criteria
cpe:2.3:a:cyrus:imap:*:*:*:*:*:*:*:*
>= 3.3.0, < 3.4.1CPE matchmatch criteria
cpe:2.3:a:cyrus:imap:*:*:*:*:*:*:*:*
34CPE matchmatch criteria
cpe:2.3:o:fedoraproject:fedora:34:*:*:*:*:*:*:*
35CPE matchmatch criteria
cpe:2.3:o:fedoraproject:fedora:35:*:*:*:*:*:*:*

CVSS Data

CVSS version used by this source: 3.1

4.3MEDIUM

CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:L

Attack Vector
NETWORK
Attack Complexity
LOW
Privileges Required
LOW
User Interaction
NONE
Scope
UNCHANGED
Confidentiality Impact
NONE
Integrity Impact
NONE
Availability Impact
LOW
Exploitability Score
2.8
Impact Score
1.4
CvssVersion
3.1

Exploit Intelligence

EPSS Score
1.70%
Probability of exploitation in next 30 days
EPSS Percentile
74.8%
Percentile rank of EPSS score among Peer Group
As of 2026-07-27
Model: v2026.06.15
This CVE's current EPSS score of 0.0170 is in the 88th percentile among its peer group of 21,957 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

Vendor Patches (1)

redhatend of lifevia redhat_api
Product: Red Hat Enterprise Linux 8Fixed in: cyrus-imapd

Vendor Advisories (1)

redhatCVE-2021-32056Moderate

cyrus-imapd: remote authenticated users could bypass intended access restrictions on certain server annotations

May 10, 2021

References

cyrus.topicbox.com / groups/announce/T056901c106ecfce3/cyrus-imap-3-4-1-released
PatchRelease NotesVendor Advisory
cyrus.topicbox.com / groups/announce/T126392718bc29d6b/cyrus-imap-3-2-7-released
PatchRelease NotesVendor Advisory
lists.fedoraproject.org / archives/list/package-announce%40lists.fedoraproject.org/message/6HEO3RURJW6NLIXS7NK5PVU6MGHC4SCM
lists.fedoraproject.org / archives/list/package-announce%40lists.fedoraproject.org/message/WJZB45QBUN7CZFGOWCZYUYACNBTX7LVS
cyrusimap.org / imap/download/release-notes/3.2/x/3.2.7.html
PatchRelease NotesVendor Advisory
cyrusimap.org / imap/download/release-notes/3.4/x/3.4.1.html
PatchRelease NotesVendor Advisory