CVE-2022-27924

CVE-2022-27924 is a high-severity vulnerability in Synacor Zimbra Collaboration Suite with a CVSS 3.x base score of 7.5. It is listed in CISA's Known Exploited Vulnerabilities (KEV) catalog, confirming it has been exploited in the wild (added 2022-08-04). The underlying weakness is classified as CWE-74.

Key facts

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.

Frequently asked questions

What is CVE-2022-27924?
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.
How severe is CVE-2022-27924?
CVE-2022-27924 has a CVSS 3.x base score of 7.5, rated high severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is none, integrity high, and availability none.
Is CVE-2022-27924 being actively exploited?
Yes. CVE-2022-27924 is on CISA's Known Exploited Vulnerabilities (KEV) catalog, added on 2022-08-04, which means active exploitation has been confirmed. It should be prioritised for remediation.
What products are affected by CVE-2022-27924?
CVE-2022-27924 primarily affects Synacor Zimbra Collaboration Suite. In total, 56 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.
How do I fix CVE-2022-27924?
Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Because this CVE is known to be actively exploited, treat remediation as urgent — CISA KEV typically sets a short remediation deadline.
Does CVE-2022-27924 have an EU (EUVD) identifier?
Yes. CVE-2022-27924 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2022-32412. It is also flagged as exploited in the EUVD (since 2022-08-04).
When was CVE-2022-27924 published?
CVE-2022-27924 was published on 2022-04-21 and last updated on 2026-10-02.

References

Affected products (56)

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