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
8.8EG
EchelonGraph verdictPlan a fixSerious severity, but no confirmed exploitation yet.
  • High severity, but no confirmed exploitation yet
CISA-KEV: Not listedEPSS PROB: 1%CVSS: 8.8Exploit: None knownExposed: 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)
EG Risk
40(Track)
EG Risk 40/100SSVC: 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
Severity88% × 45%
Exploitation1% × 40%
Automatability0% × 15%
Action: Routine — remediate on your standard cadence.
EPSS PROB
1%
EPSS %ILE
49%
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 5× in last 7d / 28× 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 233 total refreshes for this CVE.

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

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 1% probability of exploitation in the next 30 days, which ranks it in the top 51.1% of all scored CVEs.
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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