CVE-2022-27926

CRITICALNVD 6.19.0▲
EchelonGraph scoreHIGH confidence

Score elevated to 9.0 because this CVE is listed on the CISA Known Exploited Vulnerabilities catalog (added 2023-04-03), indicating real-world exploitation has been confirmed by US federal agencies. NVD baseline CVSS 6.1 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: 18%CVSS: 6.1Exploit: cisa kev · ssvc active · epss top5pct · public exploitExposed: 0

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

A reflected cross-site scripting (XSS) vulnerability in the /public/launchNewWindow.jsp component of Zimbra Collaboration (aka ZCS) 9.0 allows unauthenticated attackers to execute arbitrary web script or HTML via request parameters.

CVSS v3
6.1
EG Score
9.0(high)
EG Risk
81(Attend)
EG Risk 81/100SSVC: Attend

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%
Automatability0% × 15%
Action: Remediate soon — notable exploitation risk.
EPSS PROB
18%
EPSS %ILE
97%
KEV
⚠ Exploited

Published

April 21, 2022

Last Modified

October 31, 2025

Advisory Details (4)

Auto-updated Jun 13, 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-2022-27926
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(1)

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

Data Freshness Timeline

(refreshed 58× in last 7d / 243× 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 900 total refreshes for this CVE.

  1. 2026-09-25 14:55 UTCCISA KEV update
  2. 2026-09-25 12:01 UTCGHSA enrichment
  3. 2026-09-25 07:52 UTCGHSA enrichment
  4. 2026-09-25 03:43 UTCGHSA enrichment
  5. 2026-09-24 23:34 UTCGHSA enrichment
  6. 2026-09-24 19:31 UTCCISA KEV update
  7. 2026-09-24 19:24 UTCGHSA enrichment
  8. 2026-09-24 15:15 UTCEG score recompute
  9. 2026-09-24 15:15 UTCGHSA enrichment
  10. 2026-09-24 14:00 UTCEPSS rescore
  11. 2026-09-24 11:07 UTCGHSA enrichment
  12. 2026-09-24 06:58 UTCGHSA enrichment
  13. 2026-09-24 02:50 UTCGHSA enrichment
  14. 2026-09-23 22:42 UTCGHSA enrichment
  15. 2026-09-23 18:33 UTCGHSA enrichment
  16. 2026-09-23 14:24 UTCEG score recompute
  17. 2026-09-23 14:24 UTCGHSA enrichment
  18. 2026-09-23 13:45 UTCEPSS rescore
  19. 2026-09-23 10:16 UTCGHSA enrichment
  20. 2026-09-23 06:07 UTCGHSA enrichment
  21. 2026-09-23 01:59 UTCGHSA enrichment
  22. 2026-09-22 21:50 UTCGHSA enrichment
  23. 2026-09-22 19:36 UTCCISA KEV update
  24. 2026-09-22 17:41 UTCEG score recompute
  25. 2026-09-22 17:41 UTCGHSA enrichment
Show 75 more
  1. 2026-09-22 14:44 UTCEPSS rescore
  2. 2026-09-22 13:32 UTCGHSA enrichment
  3. 2026-09-22 09:24 UTCGHSA enrichment
  4. 2026-09-22 05:14 UTCGHSA enrichment
  5. 2026-09-22 01:05 UTCGHSA enrichment
  6. 2026-09-21 20:56 UTCEG score recompute
  7. 2026-09-21 20:56 UTCGHSA enrichment
  8. 2026-09-21 19:09 UTCCISA KEV update
  9. 2026-09-21 16:48 UTCGHSA enrichment
  10. 2026-09-21 12:39 UTCGHSA enrichment
  11. 2026-09-21 08:30 UTCGHSA enrichment
  12. 2026-09-21 04:20 UTCGHSA enrichment
  13. 2026-09-21 00:12 UTCEG score recompute
  14. 2026-09-21 00:12 UTCGHSA enrichment
  15. 2026-09-20 20:13 UTCEPSS rescore
  16. 2026-09-20 20:03 UTCGHSA enrichment
  17. 2026-09-20 15:54 UTCGHSA enrichment
  18. 2026-09-20 11:45 UTCGHSA enrichment
  19. 2026-09-20 07:35 UTCGHSA enrichment
  20. 2026-09-20 03:23 UTCGHSA enrichment
  21. 2026-09-19 23:15 UTCGHSA enrichment
  22. 2026-09-19 19:06 UTCEG score recompute
  23. 2026-09-19 19:06 UTCGHSA enrichment
  24. 2026-09-19 15:38 UTCEPSS rescore
  25. 2026-09-19 14:54 UTCGHSA enrichment
  26. 2026-09-19 10:45 UTCGHSA enrichment
  27. 2026-09-19 06:36 UTCGHSA enrichment
  28. 2026-09-19 02:28 UTCGHSA enrichment
  29. 2026-09-18 22:18 UTCEG score recompute
  30. 2026-09-18 22:18 UTCGHSA enrichment
  31. 2026-09-18 19:24 UTCEPSS rescore
  32. 2026-09-18 19:20 UTCCISA KEV update
  33. 2026-09-18 18:10 UTCGHSA enrichment
  34. 2026-09-18 14:15 UTCCISA KEV update
  35. 2026-09-18 14:01 UTCGHSA enrichment
  36. 2026-09-18 09:52 UTCGHSA enrichment
  37. 2026-09-18 05:44 UTCGHSA enrichment
  38. 2026-09-18 01:35 UTCGHSA enrichment
  39. 2026-09-17 21:27 UTCEG score recompute
  40. 2026-09-17 21:27 UTCGHSA enrichment
  41. 2026-09-17 17:17 UTCGHSA enrichment
  42. 2026-09-17 13:05 UTCGHSA enrichment
  43. 2026-09-17 08:56 UTCGHSA enrichment
  44. 2026-09-17 04:47 UTCGHSA enrichment
  45. 2026-09-17 00:38 UTCGHSA enrichment
  46. 2026-09-16 20:29 UTCGHSA enrichment
  47. 2026-09-16 16:20 UTCEG score recompute
  48. 2026-09-16 16:19 UTCGHSA enrichment
  49. 2026-09-16 14:10 UTCCISA KEV update
  50. 2026-09-16 14:05 UTCEPSS rescore
  51. 2026-09-16 12:09 UTCGHSA enrichment
  52. 2026-09-16 08:00 UTCEG score recompute
  53. 2026-09-16 08:00 UTCGHSA enrichment
  54. 2026-09-16 03:47 UTCGHSA enrichment
  55. 2026-09-15 23:38 UTCGHSA enrichment
  56. 2026-09-15 19:29 UTCGHSA enrichment
  57. 2026-09-15 15:20 UTCGHSA enrichment
  58. 2026-09-15 11:11 UTCGHSA enrichment
  59. 2026-09-15 07:02 UTCEG score recompute
  60. 2026-09-15 07:02 UTCGHSA enrichment
  61. 2026-09-15 03:06 UTCEPSS rescore
  62. 2026-09-15 02:54 UTCGHSA enrichment
  63. 2026-09-14 22:45 UTCGHSA enrichment
  64. 2026-09-14 19:24 UTCCISA KEV update
  65. 2026-09-14 18:36 UTCGHSA enrichment
  66. 2026-09-14 14:25 UTCGHSA enrichment
  67. 2026-09-14 10:17 UTCGHSA enrichment
  68. 2026-09-14 06:08 UTCGHSA enrichment
  69. 2026-09-14 02:00 UTCGHSA enrichment
  70. 2026-09-13 21:51 UTCGHSA enrichment
  71. 2026-09-13 17:42 UTCGHSA enrichment
  72. 2026-09-13 13:32 UTCGHSA enrichment
  73. 2026-09-13 09:23 UTCGHSA enrichment
  74. 2026-09-13 05:13 UTCGHSA enrichment
  75. 2026-09-13 01:05 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-2022-27926.yaml
    First seen Jan 1, 2022

    Zimbra Collaboration (ZCS) - Cross Site Scripting

    Open source ↗

Related CVEs(same CWE)

Frequently asked(6)

What is CVE-2022-27926?
CVE-2022-27926 is a critical vulnerability published on April 21, 2022. A reflected cross-site scripting (XSS) vulnerability in the /public/launchNewWindow.jsp component of Zimbra Collaboration (aka ZCS) 9.0 allows unauthenticated attackers to execute arbitrary web script or HTML via request parameters.
When was CVE-2022-27926 disclosed?
CVE-2022-27926 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-2022-27926 actively exploited?
Yes. CISA added CVE-2022-27926 to the Known Exploited Vulnerabilities catalog on April 3, 2023, 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-2022-27926?
CVE-2022-27926 has a CVSS v3 base score of 6.1 (NVD). EchelonGraph synthesises NVD + CISA KEV + FIRST EPSS + GHSA into a combined EG score of 9.0.
Which products are affected by CVE-2022-27926?
CVE-2022-27926 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-2022-27926?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2022-27926, 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-2022-27926

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