CVE-2022-27924

synacor zimbra collaboration suite

Published 21 Apr 2022 · updated 2 Oct 2026 · Analyzed

7.5 High · CVSS 3.1, NVD

Exploited in the wild

CISA added this to its Known Exploited Vulnerabilities catalog on 4 Aug 2022, with a remediation deadline of 25 Aug 2022 for US federal agencies. It has been used in ransomware campaigns.

Required action: Apply updates per vendor instructions.

Description

Zimbra Collaboration (aka ZCS) 8.8.15 and 9.0 allows an unauthenticated attacker to inject arbitrary memcache commands into a targeted instance. These memcache commands becomes unescaped, causing an overwrite of arbitrary cached entries.

References

wiki.zimbra.com/wiki/Security_Center · Vendor Advisory
wiki.zimbra.com/wiki/Zimbra_Releases/9.0.0/P24 · Release Notes, Vendor Advisory
wiki.zimbra.com/wiki/Zimbra_Security_Advisories · Vendor Advisory
www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2022-27924 · US Government Resource