CVE-2026-77645

CRITICALPre-NVD 9.29.2—
EchelonGraph scoreMEDIUM confidence

This critical-severity CVE scores 9.2 under a secondary CVSS source (NVD's own analysis pending). EPSS exploit probability: 0.5%, top 60% 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
9.2EG
EchelonGraph verdictPlan a fixSerious severity, but no confirmed exploitation yet.
  • High severity, but no confirmed exploitation yet
CISA-KEV: Not listedEPSS PROB: 0%CVSS: 9.2Exploit: None knownExposed: 0

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

A critical remote code execution (RCE) vulnerability has been reported in PTC Windchill and PTC FlexPLM. The vulnerability may be exploited through the deserialization of untrusted data.

CVSS v3
9.2
EG Score
9.2(medium)
EG Risk
42(Track)
EG Risk 42/100SSVC: 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
Severity92% × 45%
Exploitation0% × 40%
Automatability0% × 15%
Action: Routine — remediate on your standard cadence.
EPSS PROB
0%
EPSS %ILE
40%
KEV
Not listed

Published

August 20, 2026

Last Modified

September 9, 2026

References (1)

Vendor Advisories for CVE-2026-77645(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 / 217× 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 227 total refreshes for this CVE.

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

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Frequently asked(5)

What is CVE-2026-77645?
CVE-2026-77645 is a critical vulnerability published on August 20, 2026. A critical remote code execution (RCE) vulnerability has been reported in PTC Windchill and PTC FlexPLM. The vulnerability may be exploited through the deserialization of untrusted data.
When was CVE-2026-77645 disclosed?
CVE-2026-77645 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-2026-77645 actively exploited?
CVE-2026-77645 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 60.0% of all scored CVEs.
What is the CVSS score of CVE-2026-77645?
CVE-2026-77645 has a CVSS v3 base score of 9.2 (NVD).
How do I remediate CVE-2026-77645?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2026-77645, 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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