cyrusimap Cyrus IMAP up to 3.12.2 ACL permission

CVSS Meta Temp Score
CVSS is a standardized scoring system to determine possibilities of attacks. The Temp Score considers temporal factors like disclosure, exploit and countermeasures. The unique Meta Score calculates the average score of different sources to provide a normalized scoring system.
Current Exploit Price (≈)
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CTI Interest Score
Our Cyber Threat Intelligence team is monitoring different web sites, mailing lists, exploit markets and social media networks. The CTI Interest Score identifies the interest of attackers and the security community for this specific vulnerability in real-time. A high score indicates an elevated risk to be targeted for this vulnerability.
9.5$0-$5k2.79

Summaryinfo

A vulnerability marked as very critical has been reported in cyrusimap Cyrus IMAP up to 3.12.2. Affected by this vulnerability is an unknown functionality of the component ACL. This manipulation causes permission. This vulnerability is handled as CVE-2026-47084. The attack can be initiated remotely. There is not any exploit available.

Detailsinfo

A vulnerability classified as very critical was found in cyrusimap Cyrus IMAP up to 3.12.2. Affected by this vulnerability is an unknown code of the component ACL. The manipulation with an unknown input leads to a permission vulnerability. The CWE definition for the vulnerability is CWE-275. As an impact it is known to affect confidentiality, integrity, and availability. The summary by CVE is:

An issue was discovered in cyrus-imapd in Cyrus IMAP through 3.12.2. The LOCALDELETE command bypassed ACL checks. An authenticated but non-admin user could invoke the admin-only LOCALDELETE IMAP command and delete mailboxes for which they had no permissions.

The advisory is shared at cyrusimap.org. This vulnerability is known as CVE-2026-47084 since 05/18/2026. The exploitation appears to be easy. The attack can be launched remotely. Neither technical details nor an exploit are publicly available. The price for an exploit might be around USD $0-$5k at the moment (estimation calculated on 07/16/2026). MITRE ATT&CK project uses the attack technique T1222 for this issue.

Upgrading to version 3.12.3 eliminates this vulnerability.

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Productinfo

Vendor

Name

Version

CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB Vector: 🔒
VulDB Reliability: 🔍

CVSSv3info

VulDB Meta Base Score: 9.9
VulDB Meta Temp Score: 9.5

VulDB Base Score: 9.9
VulDB Temp Score: 9.5
VulDB Vector: 🔒
VulDB Reliability: 🔍

CVSSv2info

AVACAuCIA
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💳💳💳💳💳💳
💳💳💳💳💳💳
VectorComplexityAuthenticationConfidentialityIntegrityAvailability
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VulDB Base Score: 🔒
VulDB Temp Score: 🔒
VulDB Reliability: 🔍

Exploitinginfo

Class: Permission
CWE: CWE-275 / CWE-266
CAPEC: 🔒
ATT&CK: 🔒

Physical: No
Local: No
Remote: Yes

Availability: 🔒
Status: Not defined
Price Prediction: 🔍
Current Price Estimation: 🔒

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Threat Intelligenceinfo

Interest: 🔍
Active Actors: 🔍
Active APT Groups: 🔍

Countermeasuresinfo

Recommended: no mitigation known
Status: 🔍

0-Day Time: 🔒

Upgrade: Cyrus IMAP 3.12.3

Timelineinfo

05/18/2026 CVE reserved
07/16/2026 +59 days Advisory disclosed
07/16/2026 +0 days VulDB entry created
07/16/2026 +0 days VulDB entry last update

Sourcesinfo

Advisory: cyrusimap.org
Status: Confirmed

CVE: CVE-2026-47084 (🔒)
GCVE (CVE): GCVE-0-2026-47084
GCVE (VulDB): GCVE-100-379621

Entryinfo

Created: 07/16/2026 21:14
Changes: 07/16/2026 21:14 (53)
Complete: 🔍
Cache ID: 216::103

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