Medium severity · published Jul 16, 2026
CVE-2026-47082
An issue was discovered in cyrus-imapd in Cyrus IMAP through 3.12.2
5.4
CVSS
0.3%
EPSS
No
On KEV
Description
An issue was discovered in cyrus-imapd in Cyrus IMAP through 3.12.2. The vacation "fcc" feature skips the destination-mailbox ACL. A user whose vacation Sieve script used :fcc (to save a copy of the sent message) could deliver vacation auto-reply copies into any mailbox the script could name, regardless of whether the script owner had insert permissions on the destination mailbox.
CVSS vector
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:L/A:L
Attack vector
Network
Complexity
Low
Privileges
Low
User interaction
None
Confidentiality
None
Integrity
Low
Availability
Low
Scope
Unchanged
Exploitation
Is it being used?
Exploit prediction (EPSS)0.3% · higher than 22% of CVEs
Exploited in the wildNo evidence yet
CISA KEVNot listed
Ransomware campaign useNot known
Affected products
Which versions
CI
Cyrus IMAP · cyrusimap
before 3.12.3 · source: vendor
References
NVD
https://nvd.nist.gov/vuln/detail/CVE-2026-47082
CVE.org
https://www.cve.org/CVERecord?id=CVE-2026-47082
www.cyrusimap.org
https://www.cyrusimap.org/3.12/imap/download/release-notes/3.12/x/3.12.3.html
www.cyrusimap.org
https://www.cyrusimap.org/imap/download/release-notes/index.html
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