CVE-2025-42611

MEDIUMNVD 6.56.5—
EchelonGraph scoreMEDIUM confidence

Score 6.5 from GitHub Security Advisory published 2026-05-05. NVD baseline CVSS 6.5; sources differ by 0.0.

Triggered by: GitHub Security Advisory CVSS
Sources: epss, ghsa, nvd
6.5EG
EchelonGraph verdictMonitorLow exploitation likelihood right now — keep watching.
  • Lower severity and no public exploit yet
CISA-KEV: Not listedEPSS PROB: 0%CVSS: 6.5Exploit: None knownExposed: 0

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

RouterOS provides various services that rely on correct verification of client and server certificates to secure confidentiality and integrity of communications. This includes OpenVPN, CAPsMAN, Dot1x (802.1X), among others.

The vulnerability lies in shared certificate validation logic which uses the system certificate store that is shared and equally trusted by all system services. This causes confusion of scope, allowing any certificate authority present in the system-wide trust store to be trusted in any context (with some exceptions), allowing partial or full authentication bypass in CAPsMAN, OpenVPN, Dot1X and potentially others.

CVSS v3
6.5
EG Score
6.5(medium)
EG Risk
29(Track)
EG Risk 29/100SSVC: 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
Severity65% × 45%
Exploitation0% × 40%
Automatability0% × 15%
Action: Routine — remediate on your standard cadence.
EPSS PROB
0%
EPSS %ILE
8%
KEV
Not listed

Published

May 5, 2026

Last Modified

May 7, 2026

Advisory Details (1)

Auto-updated May 5, 2026
No patch confirmed yet.
generic

CVE-2025-42611 – Authentication bypass in multiple RouterOS services caused by improper certificate validation - SI CERT

https://www.cert.si/en/cve-2025-42611/

Weakness Classification(1)

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

Data Freshness Timeline

(refreshed 4× in last 7d / 26× 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 203 total refreshes for this CVE.

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

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Frequently asked(5)

What is CVE-2025-42611?
CVE-2025-42611 is a medium vulnerability published on May 5, 2026. RouterOS provides various services that rely on correct verification of client and server certificates to secure confidentiality and integrity of communications. This includes OpenVPN, CAPsMAN, Dot1x (802.1X), among others. The vulnerability lies in shared certificate validation logic which uses…
When was CVE-2025-42611 disclosed?
CVE-2025-42611 was first published in the National Vulnerability Database on May 5, 2026, with the most recent update on May 7, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2025-42611 actively exploited?
CVE-2025-42611 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 91.5% of all scored CVEs.
What is the CVSS score of CVE-2025-42611?
CVE-2025-42611 has a CVSS v3 base score of 6.5 (NVD).
How do I remediate CVE-2025-42611?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2025-42611, 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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