Vulnary
← back to the feed
Critical· 9.8actively exploitedofficial fix available

CVE-2022-41352

Zimbra Collaboration Suite versions 8.8.15 and 9.0 are vulnerable to a critical flaw that lets attackers upload arbitrary files via the amavis mail filter. The flaw uses a cpio extraction bug to place files in a public web directory, allowing attackers to access other users’ data. The issue is fixed by applying vendor‑supplied updates.

publishedSep 26, 2022
last modifiedSep 10, 2026
sourcesNVD · CISA-KEV
severity · cvss
9.8
critical · how bad it is
exploitation · epss
95%
100th percentile · chance of exploitation in 30 days
(ai-assisted) A model wrote this summary from the official data, so double-check it against the source before you act on it. Read the official advisory →
auto-deletes from the system
counting…on Oct 10, 2026

An official fix is available, so this entry is kept for 30 days and then removed automatically.

01

Who is affected

Zimbra Collaboration Suite 8.8.15 and 9.0 (all supported platforms).

02

Real-world impact

An attacker can place malicious files in a publicly accessible directory and then read or modify any other user’s data, effectively bypassing account isolation and potentially compromising the entire mail system.

03

Why this severity

The CVSS score of 9.8 reflects that the vulnerability can be exploited over the network with no authentication, no user interaction, and provides full confidentiality, integrity, and availability compromise for all affected accounts.

04

What to do about it

official fix available
recommended steps
  1. 01Apply updates per vendor instructions.

CISA KEV required action

05

Timeline

  1. Sep 26, 2022 · Sep 26, 2022
    Published
    Disclosed and added to the National Vulnerability Database.
  2. Oct 20, 2022 · Oct 20, 2022
    Confirmed exploited (CISA KEV)
    CISA added it to the Known Exploited Vulnerabilities catalog — attackers are using it in the wild.
  3. Nov 10, 2022 · Nov 10, 2022
    CISA remediation deadline
    Federal agencies are required to remediate by this date.
  4. Sep 10, 2026 · 4d ago
    Advisory updated
    The NVD record was last revised.
  5. Sep 10, 2026 · 3d ago
    Official fix available
    A vendor patch or mitigation now exists — see the remediation steps above.
06

How it’s attacked

Attack vectorNetwork (remote)
Attack complexityLow
Privileges requiredNone
User interactionNone needed
ScopeUnchanged
Confidentiality impactHigh
Integrity impactHigh
Availability impactHigh
07

References & advisories

NVD advisory ↗CISA KEV catalog ↗Search advisories ↗
(ai-assisted) A model wrote this summary from the official data, so double-check it against the source before you act on it. Read the official advisory →