CVE-2022-27924

HIGHNVD 7.59.0▲Trending — 4 sources updated this weekExploited in the wild

7.5

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.

CVSS v3: 7.5
EG Score: 9.0(high)
EPSS: 99.6%
KEV: ⚠ Exploited

Published

April 21, 2022

Last Modified

October 31, 2025

Advisory Details (4)

Auto-updated Jun 4, 2026

⚠️ Active exploitation confirmed. Patch available. Sources: cisa.

cisa Patch Available🔴 Active Exploitation

Known Exploited Vulnerabilities Catalog | CISA

Known Exploited Vulnerabilities Catalog | CISA. Listed in CISA Known Exploited Vulnerabilities catalog.

https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2022-27924

generic

Zimbra Security Advisories - Zimbra :: Tech Center

https://wiki.zimbra.com/wiki/Zimbra_Security_Advisories

generic Patch Available

Zimbra Releases/9.0.0/P24 - Zimbra :: Tech Center

https://wiki.zimbra.com/wiki/Zimbra_Releases/9.0.0/P24

generic🔴 Active Exploitation

Security Center - Zimbra :: Tech Center

https://wiki.zimbra.com/wiki/Security_Center

Weakness Classification(2)

MITRE Common Weakness Enumeration — the root-cause categories this CVE belongs to.

Data Freshness Timeline

(refreshed 20× in last 7d / 20× in last 30d)

Every time one of our enrichment pipelines (NVD, MITRE cvelistV5, EPSS, CISA KEV, GHSA, OSV, vendor advisories) ran against this CVE. Most recent first.

2026-06-05 06:50 UTCEG score recompute
2026-06-05 06:50 UTCGHSA enrichment
2026-06-05 03:10 UTCEG score recompute
2026-06-05 03:10 UTCGHSA enrichment
2026-06-04 23:30 UTCEG score recompute
2026-06-04 23:30 UTCGHSA enrichment
2026-06-04 19:44 UTCEG score recompute
2026-06-04 19:44 UTCGHSA enrichment
2026-06-04 16:04 UTCEG score recompute
2026-06-04 16:04 UTCGHSA enrichment
2026-06-04 12:24 UTCEG score recompute
2026-06-04 12:24 UTCGHSA enrichment
2026-06-04 08:44 UTCEG score recompute
2026-06-04 08:44 UTCGHSA enrichment
2026-06-04 05:04 UTCEG score recompute
2026-06-04 05:04 UTCGHSA enrichment
2026-06-04 01:24 UTCEG score recompute
2026-06-04 01:24 UTCGHSA enrichment
2026-06-03 21:44 UTCEG score recompute
2026-06-03 21:44 UTCGHSA enrichment

Publicly available exploits

(1 reference)

Working exploit code is in the public domain. Defenders should treat patch urgency accordingly — public PoCs typically lead to mass-exploitation within 24-72 hours.

Nucleihttp/cves/2022/CVE-2022-27924.yaml
First seen Jan 1, 2022
Zimbra Collaboration Suite - Memcached Command Injection
Open source ↗

Frequently asked(6)

What is CVE-2022-27924?

CVE-2022-27924 is a high vulnerability published on April 21, 2022. 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.

When was CVE-2022-27924 disclosed?

CVE-2022-27924 was first published in the National Vulnerability Database on April 21, 2022, with the most recent update on October 31, 2025. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.

Is CVE-2022-27924 actively exploited?

Yes. CISA added CVE-2022-27924 to the Known Exploited Vulnerabilities catalog on August 4, 2022, affecting Synacor Zimbra Collaboration Suite (ZCS). KEV listing indicates confirmed exploitation in the wild; this CVE warrants immediate patching attention.

What is the CVSS score of CVE-2022-27924?

CVE-2022-27924 has a CVSS v3 base score of 7.5 (NVD). EchelonGraph synthesises NVD + CISA KEV + FIRST EPSS + GHSA into a combined EG score of 9.0.

Which products are affected by CVE-2022-27924?

CVE-2022-27924 affects Synacor Zimbra Collaboration Suite (ZCS). The full affected-products list, including version ranges and fixed versions, is shown in the Affected Packages section of this page.

How do I remediate CVE-2022-27924?

Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2022-27924, EchelonGraph cross-links them in the Vendor Advisories panel below — those typically contain the canonical remediation steps, fixed version numbers, and any vendor-specific mitigations.

Dependency Blast Radius

See which npm, PyPI, Go, and Maven packages are affected by CVE-2022-27924

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CVE-2022-27924

📅 Published

🔄 Last Modified

📋 Advisory Details (4)