CVE-2026-73573

MEDIUMNVD 6.56.5—
EchelonGraph scoreMEDIUM confidence

This medium-severity CVE scores 6.5 under NVD CVSS v3. EPSS exploit probability: 0.5% (36th 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: 0.5%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, a path traversal vulnerability exists in the Zimbra Briefcase document editing functionality due to improper validation of the packages parameter. An authenticated attacker can exploit this vulnerability by supplying a crafted path traversal sequence, potentially allowing unauthorized disclosure of sensitive files within the web application directory.

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
0.5%
EPSS %ILE
36th
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 28, 2026
No patch confirmed yet.
generic

Zimbra Security Advisories - Zimbra :: Tech Center

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

Zimbra Responsible Disclosure Policy - Zimbra :: Tech Center

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

Vendor Advisories for CVE-2026-73573(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 / 68× 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 121 total refreshes for this CVE.

  1. 2026-10-04 23:22 UTCEPSS rescore
  2. 2026-10-04 22:19 UTCGHSA enrichment
  3. 2026-10-03 19:48 UTCEG score recompute
  4. 2026-10-03 19:48 UTCGHSA enrichment
  5. 2026-10-03 14:26 UTCEPSS rescore
  6. 2026-10-02 07:33 UTCEG score recompute
  7. 2026-10-02 07:33 UTCGHSA enrichment
  8. 2026-10-01 19:50 UTCEPSS rescore
  9. 2026-09-30 21:47 UTCEG score recompute
  10. 2026-09-30 21:47 UTCGHSA enrichment
  11. 2026-09-29 15:24 UTCEPSS rescore
  12. 2026-09-28 13:52 UTCEPSS rescore
  13. 2026-09-28 09:39 UTCEG score recompute
  14. 2026-09-28 09:39 UTCGHSA enrichment
  15. 2026-09-27 13:48 UTCEPSS rescore
  16. 2026-09-27 09:44 UTCEG score recompute
  17. 2026-09-27 09:44 UTCGHSA enrichment
  18. 2026-09-26 15:59 UTCEPSS rescore
  19. 2026-09-25 06:21 UTCEG score recompute
  20. 2026-09-25 06:21 UTCGHSA enrichment
  21. 2026-09-24 06:25 UTCEG score recompute
  22. 2026-09-24 06:25 UTCGHSA enrichment
  23. 2026-09-23 17:54 UTCEPSS rescore
  24. 2026-09-23 06:30 UTCEG score recompute
  25. 2026-09-23 06:30 UTCGHSA enrichment
Show 75 more
  1. 2026-09-22 06:34 UTCEG score recompute
  2. 2026-09-22 06:34 UTCGHSA enrichment
  3. 2026-09-21 21:09 UTCEPSS rescore
  4. 2026-09-21 06:17 UTCEG score recompute
  5. 2026-09-21 06:17 UTCGHSA enrichment
  6. 2026-09-20 20:16 UTCEPSS rescore
  7. 2026-09-20 04:50 UTCEG score recompute
  8. 2026-09-20 04:50 UTCGHSA enrichment
  9. 2026-09-19 04:52 UTCEG score recompute
  10. 2026-09-19 04:51 UTCGHSA enrichment
  11. 2026-09-18 19:28 UTCEPSS rescore
  12. 2026-09-18 04:53 UTCEG score recompute
  13. 2026-09-18 04:53 UTCGHSA enrichment
  14. 2026-09-17 04:58 UTCEG score recompute
  15. 2026-09-17 04:58 UTCGHSA enrichment
  16. 2026-09-16 14:08 UTCEPSS rescore
  17. 2026-09-16 05:15 UTCEPSS rescore
  18. 2026-09-16 05:03 UTCGHSA enrichment
  19. 2026-09-15 04:31 UTCEG score recompute
  20. 2026-09-15 04:31 UTCGHSA enrichment
  21. 2026-09-15 03:12 UTCEPSS rescore
  22. 2026-09-14 04:36 UTCEG score recompute
  23. 2026-09-14 04:36 UTCGHSA enrichment
  24. 2026-09-13 04:41 UTCEG score recompute
  25. 2026-09-13 04:41 UTCGHSA enrichment
  26. 2026-09-12 15:02 UTCEPSS rescore
  27. 2026-09-12 04:44 UTCEG score recompute
  28. 2026-09-12 04:44 UTCGHSA enrichment
  29. 2026-09-11 14:53 UTCEPSS rescore
  30. 2026-09-11 04:48 UTCEG score recompute
  31. 2026-09-11 04:48 UTCGHSA enrichment
  32. 2026-09-10 09:35 UTCEPSS rescore
  33. 2026-09-10 04:53 UTCGHSA enrichment
  34. 2026-09-09 04:57 UTCEG score recompute
  35. 2026-09-09 04:57 UTCGHSA enrichment
  36. 2026-09-08 22:01 UTCEPSS rescore
  37. 2026-09-08 01:16 UTCEG score recompute
  38. 2026-09-08 01:16 UTCGHSA enrichment
  39. 2026-09-07 01:20 UTCEG score recompute
  40. 2026-09-07 01:20 UTCGHSA enrichment
  41. 2026-09-06 13:48 UTCEPSS rescore
  42. 2026-09-06 00:26 UTCEG score recompute
  43. 2026-09-06 00:26 UTCGHSA enrichment
  44. 2026-09-05 00:30 UTCEG score recompute
  45. 2026-09-05 00:30 UTCGHSA enrichment
  46. 2026-09-04 05:07 UTCEPSS rescore
  47. 2026-09-03 23:09 UTCGHSA enrichment
  48. 2026-09-02 23:11 UTCEG score recompute
  49. 2026-09-02 23:11 UTCGHSA enrichment
  50. 2026-09-02 14:12 UTCEPSS rescore
  51. 2026-09-01 21:46 UTCEG score recompute
  52. 2026-09-01 21:46 UTCGHSA enrichment
  53. 2026-09-01 13:54 UTCEPSS rescore
  54. 2026-09-01 04:40 UTCEPSS rescore
  55. 2026-09-01 04:40 UTCEPSS rescore
  56. 2026-08-31 21:34 UTCEG score recompute
  57. 2026-08-31 21:34 UTCGHSA enrichment
  58. 2026-08-30 19:18 UTCEPSS rescore
  59. 2026-08-30 19:17 UTCEPSS rescore
  60. 2026-08-30 15:07 UTCEG score recompute
  61. 2026-08-30 15:06 UTCGHSA enrichment
  62. 2026-08-30 01:22 UTCEPSS rescore
  63. 2026-08-29 15:09 UTCEG score recompute
  64. 2026-08-29 15:09 UTCGHSA enrichment
  65. 2026-08-28 21:42 UTCEPSS rescore
  66. 2026-08-28 14:07 UTCEG score recompute▲ 3.40
  67. 2026-08-28 14:07 UTCGHSA enrichment
  68. 2026-08-28 14:04 UTCNVD updateCVSS v3 → 6.5 · severity → MEDIUM
  69. 2026-08-27 19:32 UTCEG score recompute
  70. 2026-08-27 19:32 UTCGHSA enrichment
  71. 2026-08-27 14:25 UTCEPSS rescore
  72. 2026-08-26 14:47 UTCEPSS rescore
  73. 2026-08-25 13:49 UTCEPSS rescore
  74. 2026-08-24 17:14 UTCEG score recompute
  75. 2026-08-24 17:14 UTCGHSA enrichment

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Frequently asked(5)

What is CVE-2026-73573?
CVE-2026-73573 is a medium vulnerability published on August 13, 2026. In Zimbra Collaboration (ZCS) before 10.1.17, a path traversal vulnerability exists in the Zimbra Briefcase document editing functionality due to improper validation of the packages parameter. An authenticated attacker can exploit this vulnerability by supplying a crafted path traversal sequence,…
When was CVE-2026-73573 disclosed?
CVE-2026-73573 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-2026-73573 actively exploited?
CVE-2026-73573 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 0.5% probability of exploitation in the next 30 days (36th percentile of EPSS-scored CVEs).
What is the CVSS score of CVE-2026-73573?
CVE-2026-73573 has a CVSS v3 base score of 6.5 (NVD).
How do I remediate CVE-2026-73573?
No fix for CVE-2026-73573 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-2026-73573 are linked in the Vendor Advisories panel on this page.

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