CVE-2026-77644

CRITICALPre-NVD 9.39.3—
EchelonGraph scoreMEDIUM confidence

This critical-severity CVE scores 9.3 under a secondary CVSS source (NVD's own analysis pending). EPSS exploit probability: 0.3%, top 76% of all CVEs by exploit prediction. 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
9.3EG
EchelonGraph verdictPlan a fixSerious severity, but no confirmed exploitation yet.
  • High severity, but no confirmed exploitation yet
CISA-KEV: Not listedEPSS PROB: 0%CVSS: 9.3Exploit: None knownExposed: 0

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

A critical bypass access control vulnerability has been reported in PTC Windchill Risk and Reliability (WRR) Enterprise Edition.

CVSS v3
9.3
EG Score
9.3(medium)
EG Risk
57(Track)
EG Risk 57/100SSVC: 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
Severity93% × 45%
Exploitation0% × 40%
Automatability100% × 15%
Action: Routine — remediate on your standard cadence.
EPSS PROB
0%
EPSS %ILE
24%
KEV
Not listed

Published

August 20, 2026

Last Modified

September 9, 2026

References (1)

Vendor Advisories for CVE-2026-77644(1)

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

Weakness Classification(2)

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

Data Freshness Timeline

(refreshed 50× in last 7d / 215× 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 215 total refreshes for this CVE.

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

Frequently asked(5)

What is CVE-2026-77644?
CVE-2026-77644 is a critical vulnerability published on August 20, 2026. A critical bypass access control vulnerability has been reported in PTC Windchill Risk and Reliability (WRR) Enterprise Edition.
When was CVE-2026-77644 disclosed?
CVE-2026-77644 was first published in the National Vulnerability Database on August 20, 2026, with the most recent update on September 9, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2026-77644 actively exploited?
CVE-2026-77644 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 75.5% of all scored CVEs.
What is the CVSS score of CVE-2026-77644?
CVE-2026-77644 has a CVSS v3 base score of 9.3 (NVD).
How do I remediate CVE-2026-77644?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2026-77644, 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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