CVE-2026-73576

MEDIUMNVD 6.56.5—
EchelonGraph scoreMEDIUM confidence

This medium-severity CVE scores 6.5 under NVD CVSS v3. EPSS exploit probability: 0.2%, top 91% of all CVEs by exploit prediction. GitHub Security Advisory enrichment pending alignment with NVD CVSS.

Triggered by: NVD CVSS baseline
Sources: epss, ghsa, nvd
Trending — 3 sources updated this week
6.5EG
EchelonGraph verdictMonitorLow exploitation likelihood right now — keep watching.
  • Lower severity and no public exploit yet
CISA-KEV: Not listedEPSS PROB: 0%CVSS: 6.5Exploit: None knownExposed: 0

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

In Zimbra Collaboration (ZCS) before 10.1.17, weak cryptographic key generation vulnerability exists in the OnlyOffice integration. The zimbraDocumentEditingJwtSecret is generated using an insecure random number generator, resulting in insufficient entropy. An attacker who obtains a JWT signed with the generated secret may be able to recover the JWT signing secret through offline brute-force, potentially enabling JWT forgery.

CVSS v3
6.5
EG Score
6.5(medium)
EG Risk
29(Track)
EG Risk 29/100SSVC: Track

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
Severity65% × 45%
Exploitation0% × 40%
Automatability0% × 15%
Action: Routine — remediate on your standard cadence.
EPSS PROB
0%
EPSS %ILE
9%
KEV
Not listed

Published

August 13, 2026

Last Modified

August 28, 2026

Advisory Details (2)

Auto-updated Aug 13, 2026
No patch confirmed yet.
generic

Zimbra Responsible Disclosure Policy - Zimbra :: Tech Center

https://wiki.zimbra.com/wiki/Zimbra_Responsible_Disclosure_Policy
generic

Zimbra Security Advisories - Zimbra :: Tech Center

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

Vendor Advisories for CVE-2026-73576(1)

These vendors published their own advisory mentioning this CVE — often with vendor-specific remediation steps + affected product lists not in NVD.

Weakness Classification(1)

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

Data Freshness Timeline

(refreshed 18× in last 7d / 85× 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 111 total refreshes for this CVE.

  1. 2026-09-18 22:08 UTCEG score recompute
  2. 2026-09-18 22:08 UTCGHSA enrichment
  3. 2026-09-18 19:28 UTCEPSS rescore
  4. 2026-09-17 22:18 UTCEG score recompute
  5. 2026-09-17 22:18 UTCGHSA enrichment
  6. 2026-09-16 23:59 UTCEG score recompute
  7. 2026-09-16 23:59 UTCGHSA enrichment
  8. 2026-09-16 14:08 UTCEPSS rescore
  9. 2026-09-16 05:15 UTCEPSS rescore
  10. 2026-09-15 20:08 UTCEG score recompute
  11. 2026-09-15 20:08 UTCGHSA enrichment
  12. 2026-09-15 03:12 UTCEPSS rescore
  13. 2026-09-14 20:49 UTCGHSA enrichment
  14. 2026-09-13 20:01 UTCEG score recompute
  15. 2026-09-13 20:01 UTCGHSA enrichment
  16. 2026-09-12 21:58 UTCEG score recompute
  17. 2026-09-12 21:58 UTCGHSA enrichment
  18. 2026-09-12 15:02 UTCEPSS rescore
  19. 2026-09-11 23:55 UTCEG score recompute
  20. 2026-09-11 23:55 UTCGHSA enrichment
  21. 2026-09-11 14:53 UTCEPSS rescore
  22. 2026-09-11 01:04 UTCEG score recompute
  23. 2026-09-11 01:04 UTCGHSA enrichment
  24. 2026-09-10 09:35 UTCEPSS rescore
  25. 2026-09-10 03:01 UTCGHSA enrichment
Show 75 more
  1. 2026-09-09 04:57 UTCEG score recompute
  2. 2026-09-09 04:57 UTCGHSA enrichment
  3. 2026-09-08 22:01 UTCEPSS rescore
  4. 2026-09-07 23:27 UTCEG score recompute
  5. 2026-09-07 23:27 UTCGHSA enrichment
  6. 2026-09-07 01:20 UTCEG score recompute
  7. 2026-09-07 01:20 UTCGHSA enrichment
  8. 2026-09-06 13:48 UTCEPSS rescore
  9. 2026-09-06 02:23 UTCEG score recompute
  10. 2026-09-06 02:22 UTCGHSA enrichment
  11. 2026-09-05 04:19 UTCEG score recompute
  12. 2026-09-05 04:19 UTCGHSA enrichment
  13. 2026-09-04 06:16 UTCEG score recompute
  14. 2026-09-04 06:15 UTCGHSA enrichment
  15. 2026-09-04 05:07 UTCEPSS rescore
  16. 2026-09-03 07:37 UTCEG score recompute
  17. 2026-09-03 07:37 UTCGHSA enrichment
  18. 2026-09-02 14:12 UTCEPSS rescore
  19. 2026-09-02 09:29 UTCEG score recompute
  20. 2026-09-02 09:28 UTCGHSA enrichment
  21. 2026-09-01 13:54 UTCEPSS rescore
  22. 2026-09-01 11:21 UTCEG score recompute
  23. 2026-09-01 11:20 UTCGHSA enrichment
  24. 2026-09-01 04:40 UTCEPSS rescore
  25. 2026-09-01 04:40 UTCEPSS rescore
  26. 2026-08-31 11:39 UTCEG score recompute
  27. 2026-08-31 11:39 UTCGHSA enrichment
  28. 2026-08-30 19:18 UTCEPSS rescore
  29. 2026-08-30 19:17 UTCEPSS rescore
  30. 2026-08-30 13:12 UTCEG score recompute
  31. 2026-08-30 13:12 UTCGHSA enrichment
  32. 2026-08-30 01:22 UTCEPSS rescore
  33. 2026-08-29 15:09 UTCEG score recompute
  34. 2026-08-29 15:09 UTCGHSA enrichment
  35. 2026-08-28 21:42 UTCEPSS rescore
  36. 2026-08-28 13:23 UTCEG score recompute▲ 0.20
  37. 2026-08-28 13:23 UTCGHSA enrichment
  38. 2026-08-28 13:22 UTCNVD updateCVSS v3 → 6.5
  39. 2026-08-28 00:49 UTCEG score recompute
  40. 2026-08-28 00:49 UTCGHSA enrichment
  41. 2026-08-27 14:25 UTCEPSS rescore
  42. 2026-08-27 02:42 UTCEG score recompute
  43. 2026-08-27 02:42 UTCGHSA enrichment
  44. 2026-08-26 14:47 UTCEPSS rescore
  45. 2026-08-26 04:39 UTCEG score recompute
  46. 2026-08-26 04:39 UTCGHSA enrichment
  47. 2026-08-25 13:49 UTCEPSS rescore
  48. 2026-08-25 06:35 UTCEG score recompute
  49. 2026-08-25 06:35 UTCGHSA enrichment
  50. 2026-08-24 08:30 UTCGHSA enrichment
  51. 2026-08-23 10:22 UTCEG score recompute
  52. 2026-08-23 10:22 UTCGHSA enrichment
  53. 2026-08-23 00:19 UTCEPSS rescore
  54. 2026-08-22 12:12 UTCEG score recompute
  55. 2026-08-22 12:12 UTCGHSA enrichment
  56. 2026-08-21 23:49 UTCEPSS rescore
  57. 2026-08-21 14:09 UTCGHSA enrichment
  58. 2026-08-21 00:52 UTCEG score recompute
  59. 2026-08-21 00:52 UTCGHSA enrichment
  60. 2026-08-20 22:56 UTCEPSS rescore
  61. 2026-08-20 02:49 UTCEG score recompute
  62. 2026-08-20 02:49 UTCGHSA enrichment
  63. 2026-08-19 17:04 UTCEPSS rescore
  64. 2026-08-19 04:44 UTCEG score recompute
  65. 2026-08-19 04:44 UTCGHSA enrichment
  66. 2026-08-18 13:49 UTCEPSS rescore
  67. 2026-08-18 13:49 UTCEPSS rescore
  68. 2026-08-18 06:41 UTCEG score recompute
  69. 2026-08-18 06:41 UTCGHSA enrichment
  70. 2026-08-17 13:47 UTCEPSS rescore
  71. 2026-08-17 08:38 UTCEG score recompute
  72. 2026-08-17 08:37 UTCGHSA enrichment
  73. 2026-08-16 14:56 UTCEPSS rescore
  74. 2026-08-16 14:56 UTCEPSS rescore
  75. 2026-08-16 10:34 UTCEG score recompute

Frequently asked(5)

What is CVE-2026-73576?
CVE-2026-73576 is a medium vulnerability published on August 13, 2026. In Zimbra Collaboration (ZCS) before 10.1.17, weak cryptographic key generation vulnerability exists in the OnlyOffice integration. The zimbraDocumentEditingJwtSecret is generated using an insecure random number generator, resulting in insufficient entropy. An attacker who obtains a JWT signed with…
When was CVE-2026-73576 disclosed?
CVE-2026-73576 was first published in the National Vulnerability Database on August 13, 2026, with the most recent update on August 28, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2026-73576 actively exploited?
CVE-2026-73576 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 0% probability of exploitation in the next 30 days, which ranks it in the top 90.6% of all scored CVEs.
What is the CVSS score of CVE-2026-73576?
CVE-2026-73576 has a CVSS v3 base score of 6.5 (NVD).
How do I remediate CVE-2026-73576?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2026-73576, 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

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