CVE-2025-27020

CRITICALNVD 9.89.8—
EchelonGraph scoreMEDIUM confidence

Score 9.8 from GitHub Security Advisory (severity: CRITICAL) published 2025-12-08. NVD baseline CVSS 9.8; sources differ by 0.0.

Triggered by: GitHub Security Advisory CVSS
Sources: epss, ghsa, nvd
9.8EG
EchelonGraph verdictPlan a fixSerious severity, but no confirmed exploitation yet.
  • High severity, but no confirmed exploitation yet
CISA-KEV: Not listedEPSS PROB: 1%CVSS: 9.8Exploit: None knownExposed: 0

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

Improper configuration of the SSH service in Infinera MTC-9 allows an unauthenticated attacker to execute arbitrary commands and access data on file system

.

This issue affects MTC-9: from R22.1.1.0275 before R23.0.

CVSS v3
9.8
EG Score
9.8(medium)
EG Risk
59(Track)
EG Risk 59/100SSVC: 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
Severity98% × 45%
Exploitation0% × 40%
Automatability100% × 15%
Action: Routine — remediate on your standard cadence.
EPSS PROB
1%
EPSS %ILE
42%
KEV
Not listed

Published

December 8, 2025

Last Modified

December 22, 2025

Advisory Details (1)

Auto-updated Sep 17, 2026
No patch confirmed yet.
generic

CVCN

https://www.cvcn.gov.it/cvcn/cve/CVE-2025-27020

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 143 total refreshes for this CVE.

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

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Frequently asked(5)

What is CVE-2025-27020?
CVE-2025-27020 is a critical vulnerability published on December 8, 2025. Improper configuration of the SSH service in Infinera MTC-9 allows an unauthenticated attacker to execute arbitrary commands and access data on file system . This issue affects MTC-9: from R22.1.1.0275 before R23.0.
When was CVE-2025-27020 disclosed?
CVE-2025-27020 was first published in the National Vulnerability Database on December 8, 2025, with the most recent update on December 22, 2025. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2025-27020 actively exploited?
CVE-2025-27020 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 58.0% of all scored CVEs.
What is the CVSS score of CVE-2025-27020?
CVE-2025-27020 has a CVSS v3 base score of 9.8 (NVD).
How do I remediate CVE-2025-27020?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2025-27020, 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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