CVE-2018-25237

CRITICALNVD 9.89.8—
EchelonGraph scoreMEDIUM confidence

Score 9.8 from GitHub Security Advisory (severity: CRITICAL) published 2026-04-04. 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.

Hirschmann HiSecOS devices versions prior to 05.3.03 contain a buffer overflow vulnerability in the HTTPS login interface when RADIUS authentication is enabled that allows remote attackers to crash the device or execute arbitrary code by submitting a password longer than 128 characters. Attackers can exploit improper bounds checking in password handling to overflow a fixed-size buffer and achieve denial of service or remote code execution.

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%
Exploitation1% × 40%
Automatability100% × 15%
Action: Routine — remediate on your standard cadence.
EPSS PROB
1%
EPSS %ILE
55%
KEV
Not listed

Published

April 3, 2026

Last Modified

July 21, 2026

Advisory Details (2)

Auto-updated Sep 12, 2026
No patch confirmed yet.
generic

Hirschmann HiSecOS Buffer Overflow via HTTPS Login | Advisories | VulnCheck

https://www.vulncheck.com/advisories/hirschmann-hisecos-buffer-overflow-via-https-login
generic
https://assets.belden.com/m/2d5657b3e5d721c6/original/Security-Bulletin-RADIUS-Authentication-BSECV-2018-04.pdf

Weakness Classification(1)

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

Data Freshness Timeline

(refreshed 5× in last 7d / 25× 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 238 total refreshes for this CVE.

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

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Frequently asked(5)

What is CVE-2018-25237?
CVE-2018-25237 is a critical vulnerability published on April 3, 2026. Hirschmann HiSecOS devices versions prior to 05.3.03 contain a buffer overflow vulnerability in the HTTPS login interface when RADIUS authentication is enabled that allows remote attackers to crash the device or execute arbitrary code by submitting a password longer than 128 characters. Attackers…
When was CVE-2018-25237 disclosed?
CVE-2018-25237 was first published in the National Vulnerability Database on April 3, 2026, with the most recent update on July 21, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2018-25237 actively exploited?
CVE-2018-25237 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 44.9% of all scored CVEs.
What is the CVSS score of CVE-2018-25237?
CVE-2018-25237 has a CVSS v3 base score of 9.8 (NVD).
How do I remediate CVE-2018-25237?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2018-25237, 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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