Goal Reached Thanks to every supporter — we hit 100%!

Goal: 1000 CNY · Raised: 1336 CNY

100%
Buy Us a Coffee

CVE-2026-47082

Quick assessment

Affected
cyrusimap Cyrus IMAP
Exploitation
No confirmed in-the-wild exploitation; assess based on exposure
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.

cyrusimap Cyrus IMAP是cyrusimap团队开源的一款支持IMAP协议的邮件服务器。 cyrusimap Cyrus IMAP 3.12.2及之前版本存在授权问题漏洞，该漏洞源于“fcc”功能跳过了目标邮箱ACL，用户通过“:fcc”功能将休假自动回复副本发送至无插入权限的邮箱。

CVSS 5.4 · Medium EPSS 0.20% · P10

Possible ATT&CK Techniques 1 AI

T1528 · Steal Application Access Token

Affected Version Matrix 1

VendorProduct Version RangeStatus
cyrusimap Cyrus IMAP < 3.12.3 affected
Get alerts for future matching vulnerabilities Log in to subscribe

I. Basic Information for CVE-2026-47082

Vulnerability Information
Have questions about the vulnerability? See if Shenlong's analysis helps!
View Shenlong Deep Dive ↗

Although we use advanced large model technology, its output may still contain inaccurate or outdated information.Shenlong tries to ensure data accuracy, but please verify and judge based on the actual situation.

Vulnerability Title
N/A
Source: CVE Program / CVE List V5
Vulnerability 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.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:L/A:L
Source: CVE Program / CVE List V5
Vulnerability Type
授权机制不正确
Source: CVE Program / CVE List V5
Vulnerability Title
cyrusimap Cyrus IMAP 授权问题漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
cyrusimap Cyrus IMAP是cyrusimap团队开源的一款支持IMAP协议的邮件服务器。 cyrusimap Cyrus IMAP 3.12.2及之前版本存在授权问题漏洞，该漏洞源于“fcc”功能跳过了目标邮箱ACL，用户通过“:fcc”功能将休假自动回复副本发送至无插入权限的邮箱。
Source: CNNVD (China National Vulnerability Database)
CVSS Information
N/A
Source: CNNVD (China National Vulnerability Database)
Vulnerability Type
N/A
Source: CNNVD (China National Vulnerability Database)

Affected Products

Vendor Product Affected Versions CPE Subscribe
cyrusimap Cyrus IMAP 0 ~ 3.12.3 -

II. Public POCs for CVE-2026-47082

# POC Description Source Link Shenlong Link
AI-Generated POC Premium

No public POC found.

Login to generate AI POC

III. Intelligence Information for CVE-2026-47082

请登录查看更多情报信息。

Vendor Pages for CVE-2026-47082 (2)

Same Patch Batch · cyrusimap · 2026-07-16 · 9 CVEs total

CVE-2026-47084 6.5 MEDIUM cyrusimap Cyrus IMAP 授权问题漏洞
CVE-2026-47083 4.3 MEDIUM cyrusimap Cyrus IMAP 侧信道信息泄露漏洞
CVE-2026-47089 4.3 MEDIUM cyrusimap Cyrus IMAP 授权问题漏洞
CVE-2026-47085 4.0 MEDIUM cyrusimap Cyrus IMAP 加密问题漏洞
CVE-2026-47086 3.5 LOW cyrusimap Cyrus IMAP 授权问题漏洞
CVE-2026-47087 3.5 LOW cyrusimap Cyrus IMAP 资源管理错误漏洞
CVE-2026-47081 3.1 LOW cyrusimap Cyrus IMAP 授权问题漏洞
CVE-2026-47088 3.1 LOW cyrusimap Cyrus IMAP 缓冲区错误漏洞

IV. Related Vulnerabilities

Same product: Cyrus IMAP
Same vendor: cyrusimap
Same weakness: CWE-863

V. Comments for CVE-2026-47082

No comments yet

Leave a comment