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: 0.4% (35th 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
7.7EG
EchelonGraph verdictPlan mitigationSerious severity, but no confirmed exploitation yet.
  • High severity, but no confirmed exploitation yet
CISA-KEV: Not listedEPSS PROB: 0.4%CVSS: 7.7Exploit: 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 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
7.7HIGHmedium confidence
EG Risk
50
EG Risk 50/100CISA 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
Severity77% × 45%
Exploitation0% × 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
0.4%
EPSS %ILE
35th
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 partial (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 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 23× in last 7d / 109× 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 178 total refreshes for this CVE.

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

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 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 0.4% probability of exploitation in the next 30 days (35th percentile of EPSS-scored CVEs).
What is the CVSS score of CVE-2026-77646?
CVE-2026-77646 has a CVSS base score of 7.7 (a secondary CVSS source that NVD displays; NVD's own analysis pending).
How do I remediate CVE-2026-77646?
No fix for CVE-2026-77646 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-2026-77646 are linked in the Vendor Advisories panel on this page.

Dependency Blast Radius

Explore the affected products and dependency analysis for CVE-2026-77646

Explore →

Is Your Infrastructure Affected by CVE-2026-77646?

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

Book a Demo →Browse All CVEs