CVE-2026-73576

MEDIUMNVD 6.56.5—
EchelonGraph scoreMEDIUM confidence

This medium-severity CVE scores 6.5 under NVD CVSS v3. EPSS exploit probability: 0.3% (24th percentile of EPSS-scored CVEs). 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: 0.3%CVSS: 6.5Exploit: None knownExposed services: Not assessed

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

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
6.5MEDIUMmedium confidence
EG Risk
29
EG Risk 29/100CISA SSVC

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%
CISA SSVC: Track at every mission impact level.
Action: No fix is confirmed yet. Restrict network exposure of the affected system or apply the vendor's mitigation within your standard update timelines, and watch the vendor's advisory for the fix.
EPSS PROB
0.3%
EPSS %ILE
24th
KEV
Not listed

CISA SSVCTrack at every mission impact level.

No fix is confirmed yet. Restrict network exposure of the affected system or apply the vendor's mitigation within your standard update timelines, and watch the vendor's advisory for the fix.

Exploitation none (CISA Vulnrichment) · Automatable no (CISA Vulnrichment) · Technical impact partial (CISA Vulnrichment). Mission impact is CISA's Mission & Well-being decision point, and only you can judge it: high means the affected system is essential to your organisation's mission, or its compromise could cause irreversible harm to people. CISA's decision table

Published

August 13, 2026

Last Modified

August 28, 2026

Advisory Details (2)

Auto-updated Aug 13, 2026
No fix on record 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 12× in last 7d / 65× 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 155 total refreshes for this CVE.

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

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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 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 0.3% probability of exploitation in the next 30 days (24th percentile of EPSS-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?
No fix for CVE-2026-73576 is confirmed yet. Until one is published, restrict network exposure of the affected system or apply the vendor's mitigation — for example, keep it off the internet or limit it to trusted networks — and watch the vendor's advisory for the fix. The vendor advisories EchelonGraph has for CVE-2026-73576 are linked in the Vendor Advisories panel on this page.

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