CVE-2022-27924

CRITICALNVD 7.59.0▲
EchelonGraph scoreHIGH confidence

Score elevated to 9.0 because this CVE is listed on the CISA Known Exploited Vulnerabilities catalog (added 2022-08-04), indicating real-world exploitation has been confirmed by US federal agencies. NVD baseline CVSS 7.5 retained for reference. Confidence: HIGH.

Triggered by: CISA KEV (actively exploited)
Sources: cisa_kev, epss, ghsa, nvd
Trending — 4 sources updated this weekExploited in the wild
9.0EG
EchelonGraph verdictPatch nowTreat as an emergency — this is being exploited.
  • Actively exploited in the wild (CISA-KEV)
CISA-KEV: ExploitedEPSS PROB: 85%CVSS: 7.5Exploit: cisa kev · ssvc active · kev ransomware · epss top5pct · epss high · public exploitExposed: 0

No vendor fix yet — apply a workaround or compensating control (WAF / firewall / segmentation) and watch for a patch.

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)
EG Risk
96(Act)
EG Risk 96/100SSVC: Act

EG Risk is EchelonGraph's 0–100 priority score: it fuses intrinsic severity with real-world exploitation and automatability so you can rank equal-severity CVEs and fix the most dangerous first. Higher = act sooner. Distinct from the 0–10 EG Score (severity).

How it’s computed
Severity90% × 45%
Exploitation100% × 40%
Automatability100% × 15%
Action: Fix now — active exploitation, automatable, high impact.
EPSS PROB
85%
EPSS %ILE
100%
KEV
⚠ Exploited

Published

April 21, 2022

Last Modified

August 4, 2026

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 59× in last 7d / 242× in last 30d)

Each row is a source pipeline that fetched or updated this CVE on that date, with what changed. For example, "NVD update" means NVD published or revised its analysis for this CVE; "MITRE cvelistV5" means we ingested or refreshed it from the CNA feed. Most recent first.

Showing the most recent 100 of 788 total refreshes for this CVE.

  1. 2026-09-08 16:59 UTCGHSA enrichment
  2. 2026-09-08 13:16 UTCGHSA enrichment
  3. 2026-09-08 09:36 UTCGHSA enrichment
  4. 2026-09-08 09:35 UTCGHSA enrichment
  5. 2026-09-08 05:53 UTCGHSA enrichment
  6. 2026-09-08 02:13 UTCGHSA enrichment
  7. 2026-09-07 22:34 UTCGHSA enrichment
  8. 2026-09-07 18:54 UTCEG score recompute
  9. 2026-09-07 18:54 UTCGHSA enrichment
  10. 2026-09-07 15:58 UTCEPSS rescore
  11. 2026-09-07 15:14 UTCGHSA enrichment
  12. 2026-09-07 11:35 UTCGHSA enrichment
  13. 2026-09-07 07:54 UTCGHSA enrichment
  14. 2026-09-07 04:13 UTCGHSA enrichment
  15. 2026-09-07 00:32 UTCGHSA enrichment
  16. 2026-09-06 20:53 UTCGHSA enrichment
  17. 2026-09-06 17:13 UTCEG score recompute
  18. 2026-09-06 17:13 UTCGHSA enrichment
  19. 2026-09-06 13:45 UTCEPSS rescore
  20. 2026-09-06 13:33 UTCGHSA enrichment
  21. 2026-09-06 09:53 UTCGHSA enrichment
  22. 2026-09-06 06:13 UTCGHSA enrichment
  23. 2026-09-06 02:32 UTCGHSA enrichment
  24. 2026-09-05 22:52 UTCGHSA enrichment
  25. 2026-09-05 19:12 UTCGHSA enrichment
Show 75 more
  1. 2026-09-05 15:33 UTCEG score recompute
  2. 2026-09-05 15:33 UTCGHSA enrichment
  3. 2026-09-05 15:25 UTCEPSS rescore
  4. 2026-09-05 11:50 UTCGHSA enrichment
  5. 2026-09-05 08:09 UTCGHSA enrichment
  6. 2026-09-05 04:29 UTCGHSA enrichment
  7. 2026-09-05 00:49 UTCGHSA enrichment
  8. 2026-09-04 21:07 UTCGHSA enrichment
  9. 2026-09-04 17:38 UTCCISA KEV update
  10. 2026-09-04 17:27 UTCGHSA enrichment
  11. 2026-09-04 13:47 UTCGHSA enrichment
  12. 2026-09-04 10:06 UTCGHSA enrichment
  13. 2026-09-04 06:26 UTCEG score recompute
  14. 2026-09-04 06:25 UTCGHSA enrichment
  15. 2026-09-04 05:04 UTCEPSS rescore
  16. 2026-09-04 02:43 UTCGHSA enrichment
  17. 2026-09-03 23:03 UTCGHSA enrichment
  18. 2026-09-03 19:22 UTCGHSA enrichment
  19. 2026-09-03 15:39 UTCGHSA enrichment
  20. 2026-09-03 11:58 UTCGHSA enrichment
  21. 2026-09-03 08:18 UTCGHSA enrichment
  22. 2026-09-03 04:35 UTCGHSA enrichment
  23. 2026-09-03 00:55 UTCGHSA enrichment
  24. 2026-09-02 21:15 UTCGHSA enrichment
  25. 2026-09-02 17:35 UTCEG score recompute
  26. 2026-09-02 17:34 UTCGHSA enrichment
  27. 2026-09-02 17:33 UTCCISA KEV update
  28. 2026-09-02 14:09 UTCEPSS rescore
  29. 2026-09-02 13:52 UTCGHSA enrichment
  30. 2026-09-02 10:12 UTCGHSA enrichment
  31. 2026-09-02 06:33 UTCGHSA enrichment
  32. 2026-09-02 02:52 UTCGHSA enrichment
  33. 2026-09-01 23:12 UTCGHSA enrichment
  34. 2026-09-01 19:32 UTCGHSA enrichment
  35. 2026-09-01 15:51 UTCGHSA enrichment
  36. 2026-09-01 12:11 UTCGHSA enrichment
  37. 2026-09-01 08:30 UTCGHSA enrichment
  38. 2026-09-01 04:50 UTCGHSA enrichment
  39. 2026-09-01 01:08 UTCGHSA enrichment
  40. 2026-08-31 21:26 UTCGHSA enrichment
  41. 2026-08-31 17:46 UTCGHSA enrichment
  42. 2026-08-31 14:19 UTCCISA KEV update
  43. 2026-08-31 14:07 UTCGHSA enrichment
  44. 2026-08-31 10:27 UTCGHSA enrichment
  45. 2026-08-31 06:45 UTCGHSA enrichment
  46. 2026-08-31 03:05 UTCGHSA enrichment
  47. 2026-08-30 23:25 UTCGHSA enrichment
  48. 2026-08-30 19:45 UTCEG score recompute
  49. 2026-08-30 19:45 UTCGHSA enrichment
  50. 2026-08-30 19:14 UTCEPSS rescore
  51. 2026-08-30 16:05 UTCGHSA enrichment
  52. 2026-08-30 12:26 UTCGHSA enrichment
  53. 2026-08-30 08:46 UTCGHSA enrichment
  54. 2026-08-30 05:06 UTCGHSA enrichment
  55. 2026-08-30 01:26 UTCGHSA enrichment
  56. 2026-08-29 21:46 UTCGHSA enrichment
  57. 2026-08-29 18:06 UTCGHSA enrichment
  58. 2026-08-29 14:25 UTCGHSA enrichment
  59. 2026-08-29 10:44 UTCGHSA enrichment
  60. 2026-08-29 07:04 UTCGHSA enrichment
  61. 2026-08-29 03:22 UTCGHSA enrichment
  62. 2026-08-28 23:42 UTCEG score recompute
  63. 2026-08-28 23:42 UTCGHSA enrichment
  64. 2026-08-28 21:38 UTCEPSS rescore
  65. 2026-08-28 20:01 UTCGHSA enrichment
  66. 2026-08-28 16:21 UTCGHSA enrichment
  67. 2026-08-28 12:40 UTCGHSA enrichment
  68. 2026-08-28 08:57 UTCGHSA enrichment
  69. 2026-08-28 05:14 UTCGHSA enrichment
  70. 2026-08-28 01:32 UTCGHSA enrichment
  71. 2026-08-27 21:53 UTCGHSA enrichment
  72. 2026-08-27 18:13 UTCGHSA enrichment
  73. 2026-08-27 17:22 UTCCISA KEV update
  74. 2026-08-27 14:32 UTCEG score recompute
  75. 2026-08-27 14:32 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 critical 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 August 4, 2026. 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

Explore the affected products and dependency analysis for CVE-2022-27924

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