CVE-2026-33591

CRITICALPre-NVD 10.010.0—
EchelonGraph scoreMEDIUM confidence

This critical-severity CVE scores 10.0 under a secondary CVSS source (NVD's own analysis pending). EPSS exploit probability: 0.7% (52nd percentile of EPSS-scored CVEs). GitHub Security Advisory data not yet ingested — confidence will rise once GHSA publishes (typical lag: hours to days for open-source ecosystem CVEs; never for infrastructure-only CVEs).

Triggered by: NVD CVSS baseline
Sources: epss, secondary
Trending — 3 sources updated this week
10.0EG
EchelonGraph verdictPlan mitigationSerious severity, but no confirmed exploitation yet.
  • High severity, but no confirmed exploitation yet
CISA-KEV: Not listedEPSS PROB: 0.7%CVSS: 10.0Exploit: None knownExposed services: Not assessed

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

A vulnerability in Wapt Server before version 2.6.1.17813 allows a  remote unauthenticated attacker to bypass security restriction using a specially crafted packet and retrieve a valid session token for the targeted account.

CVSS v3
10.0
EG Score
10.0CRITICALmedium confidence
EG Risk
60
EG Risk 60/100CISA 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
Severity100% × 45%
Exploitation1% × 40%
Automatability100% × 15%
CISA SSVC: Track at low or medium mission impact; Attend at high (mission-essential systems).
Action: No fix is confirmed yet. Restrict network exposure of the affected system or apply the vendor's mitigation within your standard update timelines at low or medium mission impact and sooner than that at high, and watch the vendor's advisory for the fix.
EPSS PROB
0.7%
EPSS %ILE
52nd
KEV
Not listed

CISA SSVCTrack at low or medium mission impact; Attend at high (mission-essential systems).

No fix is confirmed yet. Restrict network exposure of the affected system or apply the vendor's mitigation within your standard update timelines at low or medium mission impact and sooner than that at high, and watch the vendor's advisory for the fix.

Exploitation none (CISA Vulnrichment) · Automatable yes (CISA Vulnrichment) · Technical impact total (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 3, 2026

Last Modified

September 1, 2026

Advisory Details (3)

Auto-updated Sep 29, 2026
🔬 Proof of concept available. No patch confirmed yet.
generic

Security bulletin - WAPT documentation

https://www.wapt.fr/en/doc/wapt-security-bulletin.html
generic🟡 PoC Available

Changelog - WAPT documentation

https://www.wapt.fr/en/doc/wapt-changelog.html#wapt-2-6-1-17813-2026-06-09
generic🟡 PoC Available

Changelog - WAPT documentation

https://www.wapt.fr/en/doc/wapt-changelog.html#wapt-2-6-0-16856-2026-06-09

Vendor Advisories for CVE-2026-33591(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 22× in last 7d / 142× 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 384 total refreshes for this CVE.

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

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Frequently asked(5)

What is CVE-2026-33591?
CVE-2026-33591 is a critical vulnerability published on August 3, 2026. A vulnerability in Wapt Server before version 2.6.1.17813 allows a remote unauthenticated attacker to bypass security restriction using a specially crafted packet and retrieve a valid session token for the targeted account.
When was CVE-2026-33591 disclosed?
CVE-2026-33591 was first published on August 3, 2026, with the most recent update on September 1, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2026-33591 actively exploited?
CVE-2026-33591 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 0.7% probability of exploitation in the next 30 days (52nd percentile of EPSS-scored CVEs).
What is the CVSS score of CVE-2026-33591?
CVE-2026-33591 has a CVSS base score of 10.0 (a secondary CVSS source that NVD displays; NVD's own analysis pending).
How do I remediate CVE-2026-33591?
No fix for CVE-2026-33591 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-2026-33591 are linked in the Vendor Advisories panel on this page.

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