CVE-2023-3634

HIGHNVD 8.88.8—
EchelonGraph scoreMEDIUM confidence

Score 8.8 from GitHub Security Advisory (severity: HIGH) published 2026-04-16. NVD baseline CVSS 8.8; sources differ by 0.0.

Triggered by: GitHub Security Advisory CVSS
Sources: epss, ghsa, nvd
8.8
EchelonGraph verdictPlan a fixSerious severity, but no confirmed exploitation yet.
  • High severity, but no confirmed exploitation yet
CISA-KEV: Not listedEPSS: 1%CVSS: 8.8Exploit: NoneExposed: 0

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

In products of the MSE6 product-family by Festo a remote authenticated, low privileged attacker could use functions of undocumented test mode which could lead to a complete loss of confidentiality, integrity and availability.

CVSS v3
8.8
EG Score
8.8(medium)
EPSS
40.1%
KEV
Not listed

Published

April 16, 2026

Last Modified

April 17, 2026

Advisory Details (2)

Auto-updated May 20, 2026
No patch confirmed yet.
generic
https://festo.csaf-tp.certvde.com/.well-known/csaf/white/2023/fsa-202304.json
generic

Festo: MSE6-C2M/D2M/E2M Incomplete User Documentation of Remote Accessible Functions

https://certvde.com/de/advisories/VDE-2023-020/

Weakness Classification(1)

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

Data Freshness Timeline

(refreshed 10× in last 7d / 44× 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 143 total refreshes for this CVE.

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

Frequently asked(5)

What is CVE-2023-3634?
CVE-2023-3634 is a high vulnerability published on April 16, 2026. In products of the MSE6 product-family by Festo a remote authenticated, low privileged attacker could use functions of undocumented test mode which could lead to a complete loss of confidentiality, integrity and availability.
When was CVE-2023-3634 disclosed?
CVE-2023-3634 was first published in the National Vulnerability Database on April 16, 2026, with the most recent update on April 17, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2023-3634 actively exploited?
CVE-2023-3634 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 40.1% percentile likelihood of exploitation in the next 30 days — higher percentiles indicate greater predicted risk.
What is the CVSS score of CVE-2023-3634?
CVE-2023-3634 has a CVSS v3 base score of 8.8 (NVD).
How do I remediate CVE-2023-3634?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2023-3634, 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.

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