CVE-2026-4681

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: 0.8%, top 48% 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
9.3EG
EchelonGraph verdictPlan a fixSerious severity, but no confirmed exploitation yet.
  • High severity, but no confirmed exploitation yet
CISA-KEV: Not listedEPSS PROB: 1%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 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.

This issue affects Windchill PDMLink: 11.0 M030, 11.1 M020, 11.2.1.0, 12.0.2.0, 12.1.2.0, 13.0.2.0, 13.1.0.0, 13.1.1.0, 13.1.2.0, 13.1.3.0; FlexPLM: 11.0 M030, 11.1 M020, 11.2.1.0, 12.0.0.0, 12.0.2.0, 12.0.3.0, 12.1.2.0, 12.1.3.0, 13.0.2.0, 13.0.3.0.

CVSS v3
9.3
EG Score
9.3(medium)
EG Risk
47(Track)
EG Risk 47/100SSVC: 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%
Exploitation1% × 40%
Automatability30% × 15%
Action: Routine — remediate on your standard cadence.
EPSS PROB
1%
EPSS %ILE
54%
KEV
Not listed

Published

March 23, 2026

Last Modified

June 17, 2026

References (1)

Weakness Classification(1)

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

Data Freshness Timeline

(refreshed 4× in last 7d / 21× 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.

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

Frequently asked(5)

What is CVE-2026-4681?
CVE-2026-4681 is a critical vulnerability published on March 23, 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. This issue affects Windchill PDMLink: 11.0 M030, 11.1 M020, 11.2.1.0, 12.0.2.0, 12.1.2.0, 13.0.2.0, 13.1.0.0,…
When was CVE-2026-4681 disclosed?
CVE-2026-4681 was first published in the National Vulnerability Database on March 23, 2026, with the most recent update on June 17, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2026-4681 actively exploited?
CVE-2026-4681 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 1% probability of exploitation in the next 30 days, which ranks it in the top 46.4% of all scored CVEs.
What is the CVSS score of CVE-2026-4681?
CVE-2026-4681 has a CVSS v3 base score of 9.3 (NVD).
How do I remediate CVE-2026-4681?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2026-4681, 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

Explore the affected products and dependency analysis for CVE-2026-4681

Explore →

Is Your Infrastructure Affected by CVE-2026-4681?

EchelonGraph automatically scans your cloud infrastructure and maps CVE exposure using blast radius analysis.

Start Free Scan →Browse All CVEs