7.5HIGHCISA KEV — actively exploited

CVE-2022-27924 — Zimbra Collaboration (aka ZCS) 8.8.15 and 9.0 allows an unauthenticated attacker to inject arbitrary…

Synacor · Zimbra Collaboration Suite · Published 21 Apr 2022 · Modified 2 Oct 2026

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

https://wiki.zimbra.com/wiki/Security_Center
https://wiki.zimbra.com/wiki/Zimbra_Releases/9.0.0/P24
https://wiki.zimbra.com/wiki/Zimbra_Security_Advisories
https://wiki.zimbra.com/wiki/Security_Center
https://wiki.zimbra.com/wiki/Zimbra_Releases/9.0.0/P24
https://wiki.zimbra.com/wiki/Zimbra_Security_Advisories
https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2022-27924

What to do

Check whether Zimbra Collaboration Suite is in your asset inventory.
Exploitation confirmed — patch within 72 hours.
Record the decision in your risk register for audit evidence.

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Link: adminadda.com/cve/CVE-2022-27924