MEDIUM
CVE-2021-32056
CWE-732Published: May 10, 2021· Updated: Jun 17, 2026
4.3
CVSS v3.1
Official Description
Cyrus IMAP before 3.2.7, and 3.3.x and 3.4.x before 3.4.1, allows remote authenticated users to bypass intended access restrictions on server annotations and consequently cause replication to stall.
Technical Analysis
CVE-2021-32056 can be exploited remotely over the network without requiring physical or adjacent access, significantly expanding the attack surface for threat actors.
Exploitation requires low privileges, which limits the exposure to scenarios where an attacker has already gained initial access.
CVSS v3.1 Vector Breakdown
Exploitability
Attack VectorNetwork
Attack ComplexityLow
Privileges Req.Low
User InteractionNone
ScopeUnchanged
Impact
ConfidentialityNone
IntegrityNone
AvailabilityLow
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:L
Affected Vendors & Products
Exploit & PoC Resources
NO KNOWN EXPLOITNo public exploit confirmed at this time
Exploit-DB
Offensive Security exploit database
GitHub PoC Search
Community PoC repositories
Rapid7 / Metasploit
Metasploit module search
PacketStorm
Security advisories & exploits
NVD Detail
Official NIST entry
MITRE CVE
CVE Program entry
External links open in a new tab. Always verify in a controlled environment before use.
Official Patches & Advisories
All References (12)
→
https://cyrus.topicbox.com/groups/announce/T056901c106ecfce3/cyrus-imap-3-4-1-releasedPatch · Release Notes · Vendor Advisory
→
https://cyrus.topicbox.com/groups/announce/T126392718bc29d6b/cyrus-imap-3-2-7-releasedPatch · Release Notes · Vendor Advisory
→
https://www.cyrusimap.org/imap/download/release-notes/3.2/x/3.2.7.htmlPatch · Release Notes · Vendor Advisory
→
https://www.cyrusimap.org/imap/download/release-notes/3.4/x/3.4.1.htmlPatch · Release Notes · Vendor Advisory
→
https://cyrus.topicbox.com/groups/announce/T056901c106ecfce3/cyrus-imap-3-4-1-releasedPatch · Release Notes · Vendor Advisory
→
https://cyrus.topicbox.com/groups/announce/T126392718bc29d6b/cyrus-imap-3-2-7-releasedPatch · Release Notes · Vendor Advisory
→
https://www.cyrusimap.org/imap/download/release-notes/3.2/x/3.2.7.htmlPatch · Release Notes · Vendor Advisory
→
https://www.cyrusimap.org/imap/download/release-notes/3.4/x/3.4.1.htmlPatch · Release Notes · Vendor Advisory
Quick Facts
CVE IDCVE-2021-32056
CVSS Score4.3 / 10
SeverityMEDIUM
WeaknessCWE-732
CISA KEVNo
Affected2 vendor(s)
PublishedMay 10, 2021
Related CVEs (CWE-732)
Recommended Actions
- →Apply vendor patches immediately
- →Monitor CVE-2021-32056 in threat intel feeds
- →Review IDS/IPS signatures for exploitation attempts
Data sourced from NVD (NIST), CISA KEV, and EPSS (FIRST). Analysis generated by CTIWATCH.COM. CVE data is provided under the NVD usage policy.