CVE-2026-12200

HIGHPre-NVD 7.37.3—
EchelonGraph scoreMEDIUM confidence

Score 7.3 from GitHub Security Advisory published 2026-06-15. a secondary CVSS source baseline 7.3; sources differ by 0.0.

Triggered by: GitHub Security Advisory CVSS
Sources: epss, ghsa, secondary
Trending — 4 sources updated this week
7.3EG
EchelonGraph verdictPlan a fixSerious severity, but no confirmed exploitation yet.
  • High severity, but no confirmed exploitation yet
CISA-KEV: Not listedEPSS PROB: 0%CVSS: 7.3Exploit: None knownExposed: 0

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

A security vulnerability has been detected in Ritlabs TinyWeb Server up to 1.94 on Win32. This impacts an unknown function in the library libeay32.dll.html of the component Header Handler. The manipulation of the argument Authorization leads to stack-based buffer overflow. The attack can be initiated remotely. The exploit has been disclosed publicly and may be used. The vendor was contacted early about this disclosure but did not respond in any way.

CVSS v3
7.3
EG Score
7.3(medium)
EG Risk
48(Track)
EG Risk 48/100SSVC: 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
Severity73% × 45%
Exploitation0% × 40%
Automatability100% × 15%
Action: Routine — remediate on your standard cadence.
EPSS PROB
0%
EPSS %ILE
25%
KEV
Not listed

Published

June 15, 2026

Last Modified

July 24, 2026

Advisory Details (1)

Auto-updated Jun 15, 2026
No patch confirmed yet.
generic

Stack Overflow, but the largest byte is 3F | Nathan's Blog

https://nathan2.com/posts/tinyweb/

Vendor Advisories for CVE-2026-12200(1)

These vendors published their own advisory mentioning this CVE — often with vendor-specific remediation steps + affected product lists not in NVD.

Weakness Classification(2)

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

Data Freshness Timeline

(refreshed 14× in last 7d / 78× 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 124 total refreshes for this CVE.

  1. 2026-07-27 14:13 UTCEPSS rescore
  2. 2026-07-27 07:50 UTCGHSA enrichment
  3. 2026-07-26 20:20 UTCEG score recompute
  4. 2026-07-26 20:19 UTCGHSA enrichment
  5. 2026-07-26 14:54 UTCEPSS rescore
  6. 2026-07-26 14:54 UTCEPSS rescore
  7. 2026-07-26 05:14 UTCEG score recompute
  8. 2026-07-26 05:14 UTCGHSA enrichment
  9. 2026-07-25 14:17 UTCEPSS rescore
  10. 2026-07-24 14:17 UTCEPSS rescore
  11. 2026-07-23 14:18 UTCEPSS rescore
  12. 2026-07-23 11:51 UTCNVD updateCVSS v4 → 5.5
  13. 2026-07-23 03:05 UTCEG score recompute
  14. 2026-07-22 14:08 UTCEPSS rescore
  15. 2026-07-20 17:08 UTCEPSS rescore
  16. 2026-07-19 14:30 UTCEPSS rescore
  17. 2026-07-19 02:28 UTCEPSS rescore
  18. 2026-07-18 10:04 UTCEPSS rescore
  19. 2026-07-17 05:55 UTCGHSA enrichment
  20. 2026-07-16 17:02 UTCEPSS rescore
  21. 2026-07-16 14:40 UTCGHSA enrichment
  22. 2026-07-16 03:15 UTCGHSA enrichment
  23. 2026-07-15 16:57 UTCEPSS rescore
  24. 2026-07-15 15:52 UTCGHSA enrichment
  25. 2026-07-15 02:00 UTCEPSS rescore
Show 75 more
  1. 2026-07-15 01:27 UTCGHSA enrichment
  2. 2026-07-14 13:22 UTCGHSA enrichment
  3. 2026-07-14 02:11 UTCGHSA enrichment
  4. 2026-07-13 22:30 UTCEPSS rescore
  5. 2026-07-13 14:53 UTCGHSA enrichment
  6. 2026-07-13 06:12 UTCEPSS rescore
  7. 2026-07-13 03:41 UTCGHSA enrichment
  8. 2026-07-12 16:05 UTCGHSA enrichment
  9. 2026-07-12 05:46 UTCEPSS rescore
  10. 2026-07-12 02:57 UTCGHSA enrichment
  11. 2026-07-11 15:46 UTCGHSA enrichment
  12. 2026-07-11 08:27 UTCEPSS rescore
  13. 2026-07-11 04:34 UTCGHSA enrichment
  14. 2026-07-10 17:22 UTCGHSA enrichment
  15. 2026-07-10 02:26 UTCGHSA enrichment
  16. 2026-07-09 19:10 UTCEPSS rescore
  17. 2026-07-09 13:36 UTCGHSA enrichment
  18. 2026-07-09 02:25 UTCGHSA enrichment
  19. 2026-07-08 15:15 UTCEPSS rescore
  20. 2026-07-08 15:15 UTCEPSS rescore
  21. 2026-07-08 14:52 UTCGHSA enrichment
  22. 2026-07-08 00:30 UTCGHSA enrichment
  23. 2026-07-07 13:46 UTCEPSS rescore
  24. 2026-07-07 13:18 UTCGHSA enrichment
  25. 2026-07-07 00:33 UTCGHSA enrichment
  26. 2026-07-06 16:27 UTCEPSS rescore
  27. 2026-07-06 02:23 UTCEPSS rescore
  28. 2026-07-05 20:40 UTCGHSA enrichment
  29. 2026-07-05 09:27 UTCGHSA enrichment
  30. 2026-07-05 02:30 UTCEPSS rescore
  31. 2026-07-05 02:30 UTCEPSS rescore
  32. 2026-07-04 21:38 UTCGHSA enrichment
  33. 2026-07-04 10:10 UTCGHSA enrichment
  34. 2026-07-04 06:31 UTCEPSS rescore
  35. 2026-07-03 14:21 UTCGHSA enrichment
  36. 2026-07-03 01:29 UTCGHSA enrichment
  37. 2026-07-02 14:16 UTCGHSA enrichment
  38. 2026-07-02 03:05 UTCGHSA enrichment
  39. 2026-07-01 15:54 UTCGHSA enrichment
  40. 2026-07-01 15:06 UTCEPSS rescore
  41. 2026-07-01 15:06 UTCEPSS rescore
  42. 2026-07-01 04:42 UTCGHSA enrichment
  43. 2026-06-30 23:22 UTCEPSS rescore
  44. 2026-06-30 17:30 UTCGHSA enrichment
  45. 2026-06-30 05:47 UTCGHSA enrichment
  46. 2026-06-29 18:36 UTCGHSA enrichment
  47. 2026-06-29 07:13 UTCGHSA enrichment
  48. 2026-06-28 19:57 UTCGHSA enrichment
  49. 2026-06-28 14:07 UTCEPSS rescore
  50. 2026-06-28 08:45 UTCGHSA enrichment
  51. 2026-06-28 04:56 UTCEPSS rescore
  52. 2026-06-28 04:56 UTCEPSS rescore
  53. 2026-06-27 21:34 UTCGHSA enrichment
  54. 2026-06-27 10:23 UTCGHSA enrichment
  55. 2026-06-27 03:08 UTCEPSS rescore
  56. 2026-06-26 23:10 UTCGHSA enrichment
  57. 2026-06-26 11:59 UTCGHSA enrichment
  58. 2026-06-25 22:57 UTCGHSA enrichment
  59. 2026-06-25 13:49 UTCEPSS rescore
  60. 2026-06-25 11:44 UTCGHSA enrichment
  61. 2026-06-25 00:33 UTCGHSA enrichment
  62. 2026-06-24 14:05 UTCEPSS rescore
  63. 2026-06-24 13:22 UTCGHSA enrichment
  64. 2026-06-24 00:45 UTCGHSA enrichment
  65. 2026-06-23 21:32 UTCEPSS rescore
  66. 2026-06-23 13:30 UTCGHSA enrichment
  67. 2026-06-23 02:16 UTCGHSA enrichment
  68. 2026-06-22 15:05 UTCGHSA enrichment
  69. 2026-06-22 15:01 UTCGHSA enrichment
  70. 2026-06-22 14:25 UTCEPSS rescore
  71. 2026-06-22 14:25 UTCEPSS rescore
  72. 2026-06-22 03:49 UTCGHSA enrichment
  73. 2026-06-21 15:07 UTCGHSA enrichment
  74. 2026-06-21 14:56 UTCEPSS rescore
  75. 2026-06-21 14:56 UTCEPSS rescore

Related CVEs(same CWE)

Frequently asked(5)

What is CVE-2026-12200?
CVE-2026-12200 is a high vulnerability published on June 15, 2026. A security vulnerability has been detected in Ritlabs TinyWeb Server up to 1.94 on Win32. This impacts an unknown function in the library libeay32.dll.html of the component Header Handler. The manipulation of the argument Authorization leads to stack-based buffer overflow. The attack can be…
When was CVE-2026-12200 disclosed?
CVE-2026-12200 was first published in the National Vulnerability Database on June 15, 2026, with the most recent update on July 24, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2026-12200 actively exploited?
CVE-2026-12200 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 75.2% of all scored CVEs.
What is the CVSS score of CVE-2026-12200?
CVE-2026-12200 has a CVSS v3 base score of 7.3 (NVD).
How do I remediate CVE-2026-12200?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2026-12200, 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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