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CVE-2022-27924: Synacor Zimbra Collaboration Suite (ZCS) Command Injection Vulnerability

criticalknown exploitedpublic exploitCVE-2022-27924
Actively exploited. At least one CVE in this advisory is listed in the CISA Known Exploited Vulnerabilities catalog — exploitation has been observed in the wild. Treat remediation as urgent.
Synacor Zimbra Collaboration Suite (ZCS) allows an attacker to inject memcache commands into a targeted instance which causes an overwrite of arbitrary cached entries.

CSIRTS triage

vendor: Synacorproduct: Zimbra Collaboration Suite (ZCS)Code injection
What
An attacker can inject memcache commands, leading to overwriting of cached entries.
Who is affected
Users of Synacor Zimbra Collaboration Suite.
Urgency
Remediation is urgent due to active exploitation and critical severity.
Action
Update to the latest version of ZCS.

AI-assisted analysis generated from the source advisory — verify against the original.

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Details

Source
CISA Known Exploited Vulnerabilities (US · database · site)
Severity
critical
Published
2022-08-04
Exploitation
Observed in the wild (CISA KEV)

Original advisory: https://nvd.nist.gov/vuln/detail/CVE-2022-27924

Exploitation outlook

EPSS (FIRST.org) estimates each CVE’s probability of exploitation in the next 30 days — here is the CSIRTS.com read on those numbers.

Referenced CVEs

CVECSIRTS overviewExternal
CVE-2022-27924coverage & exploitation statusNVD · CVE.org

Recent advisories for Synacor Zimbra Collaboration

A cluster of recent advisories against the same product widens the attack surface — attackers routinely chain freshly published CVEs on one product, so review these together.

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