CVE-2022-27924

HIGH
7.5
CVSS Score
Published: April 20, 2022 at 11:23 PM UTC
Updated: October 2, 2026 at 02:55 PM UTC
2 products affected across 1 vendorZimbra Collaboration SuiteCollaboration

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Severity
HIGH7.5
Exploitation
CISA KEV
Exploit prediction
EPSS 94%
SSVC
Active

Actively Exploited

CISA Known Exploited Vulnerabilities (KEV) Catalog

EPSS Score93.9%

EPSS (Exploit Prediction Scoring System) estimates a 93.9% chance this CVE is exploited in the wild within the next 30 days — higher than 100% of all CVEs. It complements CVSS: a high EPSS on a mid-severity CVE can still be 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.

Required Action
Apply updates per vendor instructions.
Ransomware Use
Known
Added to KEV
Aug 4, 2022
Remediation Due
Aug 25, 2022
1527 days overdue

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.

Remediation

No guide yet

No remediation guidance has been written for this CVE yet. What the record does show:

References (4)

x_refsource_MISCRelease NotesVendor Advisory
https://wiki.zimbra.com/wiki/Zimbra_Releases/9.0.0/P24
US Government Resource
Source: 134c704f-9b21-4f2e-91b3-4a467353bcc0
https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2022-27924

SSVC — Action Prioritization

SSVCActiveAutomatableTotal impact

SSVC signals action urgency (what to patch first), separate from CVSS which measures severity.

CVSS

Attack Vector
NETWORK
Complexity
LOW
Privileges
NONE
User Interaction
NONE
Scope
UNCHANGED
Confidentiality
NONE
Integrity
HIGH
Availability
NONE
Vector?

Quick Info

StatusANALYZED
CWE
CWE-77CWE-74

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