CVE-2026-77646

HIGHPre-NVD 7.77.7—
EchelonGraph scoreMEDIUM confidence

This high-severity CVE scores 7.7 under a secondary CVSS source (NVD's own analysis pending). EPSS exploit probability: 0.3%, top 71% 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
7.7EG
EchelonGraph verdictPlan a fixSerious severity, but no confirmed exploitation yet.
  • High severity, but no confirmed exploitation yet
CISA-KEV: Not listedEPSS PROB: 0%CVSS: 7.7Exploit: None knownExposed: 0

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

A Server-Side Request Forgery (SSRF) vulnerability has been reported in PTC Windchill PDMLink and PTC FlexPLM. The vulnerability may be exploited through the deserialization of untrusted data.

CVSS v3
7.7
EG Score
7.7(medium)
EG Risk
50(Track)
EG Risk 50/100SSVC: 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
Severity77% × 45%
Exploitation0% × 40%
Automatability100% × 15%
Action: Routine — remediate on your standard cadence.
EPSS PROB
0%
EPSS %ILE
29%
KEV
Not listed

Published

August 20, 2026

Last Modified

September 9, 2026

References (1)

Vendor Advisories for CVE-2026-77646(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 27× in last 7d / 117× 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 128 total refreshes for this CVE.

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

Related CVEs(same CWE)

Frequently asked(5)

What is CVE-2026-77646?
CVE-2026-77646 is a high vulnerability published on August 20, 2026. A Server-Side Request Forgery (SSRF) vulnerability has been reported in PTC Windchill PDMLink and PTC FlexPLM. The vulnerability may be exploited through the deserialization of untrusted data.
When was CVE-2026-77646 disclosed?
CVE-2026-77646 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-2026-77646 actively exploited?
CVE-2026-77646 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 71.5% of all scored CVEs.
What is the CVSS score of CVE-2026-77646?
CVE-2026-77646 has a CVSS v3 base score of 7.7 (NVD).
How do I remediate CVE-2026-77646?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2026-77646, 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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