CVE-2022-41352
Published: October 20, 2022
Official Description
Synacor Zimbra Collaboration Suite (ZCS) allows an attacker to upload arbitrary files using cpio package to gain incorrect access to any other user accounts.
CISA KEV Advisory
Synacor Zimbra Collaboration Suite (ZCS) Arbitrary File Upload Vulnerability
Synacor Zimbra Collaboration Suite (ZCS) allows an attacker to upload arbitrary files using cpio package to gain incorrect access to any other user accounts.
Apply updates per vendor instructions.
Risk Analysis
This vulnerability in Synacor Zimbra Collaboration Suite (ZCS) allows an attacker to upload arbitrary files using a cpio package, leading to incorrect access to other user accounts. The high EPSS score of 0.93958 indicates a very high likelihood of exploitation, making this a critical vulnerability. Its inclusion in CISA's KEV catalog confirms active exploitation.
This vulnerability has been actively exploited in the wild, as confirmed by its exploit status and inclusion in CISA's KEV catalog. The flaw is remotely exploitable.
Upgrade Synacor Zimbra Collaboration Suite (ZCS) to a patched version to address the arbitrary file upload vulnerability. Implement strict file upload policies and monitor for unusual file activity.
Technical Analysis
CVE-2022-41352 requires local access, meaning attackers must already have a foothold on the target system.
Exploitation requires some privileges, which limits the exposure to scenarios where an attacker has already gained initial access.
CISA has added CVE-2022-41352 to the Known Exploited Vulnerabilities (KEV) catalog, confirming active exploitation in the wild. U.S. federal agencies are required to patch this within the mandated timeframe, and all organizations should treat remediation as urgent.
Exploit & PoC Resources
All References (2)
Quick Facts
Recommended Actions
- →Apply vendor patches immediately
- →Monitor CVE-2022-41352 in threat intel feeds
- →Review IDS/IPS signatures for exploitation attempts
- !CISA KEV: Federal agencies must patch per BOD 22-01 timeline
- !Active exploitation confirmed — treat as P1