CVE-2026-64940

HIGHPre-NVD 8.68.6—
EchelonGraph scoreMEDIUM confidence

Score 8.6 from GitHub Security Advisory (severity: HIGH) published 2026-08-10. a secondary CVSS source baseline 8.6; sources differ by 0.0.

Triggered by: GitHub Security Advisory CVSS
Sources: epss, ghsa, secondary
Trending — 3 sources updated this week
8.6EG
EchelonGraph verdictPlan a fixSerious severity, but no confirmed exploitation yet.
  • High severity, but no confirmed exploitation yet
CISA-KEV: Not listedEPSS PROB: 0%CVSS: 8.6Exploit: None knownExposed: 0

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

Tegalog -Fumy Otegaru Memo Logger- provided by Nishishi Factory contains a vulnerability due to a permissive regular expression, which may allow an attacker who can access the affected product to log in to the management console. As a result, the attacker may perform any operations available from the management console.

CVSS v3
8.6
EG Score
8.6(medium)
EG Risk
54(Track)
EG Risk 54/100SSVC: 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
Severity86% × 45%
Exploitation0% × 40%
Automatability100% × 15%
Action: Routine — remediate on your standard cadence.
EPSS PROB
0%
EPSS %ILE
14%
KEV
Not listed

Published

August 10, 2026

Last Modified

August 28, 2026

Advisory Details (2)

Auto-updated Aug 10, 2026
No patch confirmed yet.
generic

JVN#99975039: Permissive regular expression vulnerability in Tegalog -Fumy Otegaru Memo Logger-

https://jvn.jp/en/jp/JVN99975039/
generic

てがろぐ脆弱性対処報告と注意喚起(2026-06-29) - にししふぁくとりー

https://www.nishishi.com/cgi/tegalog/info/notice20260629.shtml

Vendor Advisories for CVE-2026-64940(1)

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

Weakness Classification(1)

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

Data Freshness Timeline

(refreshed 23× in last 7d / 105× 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 150 total refreshes for this CVE.

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

Frequently asked(5)

What is CVE-2026-64940?
CVE-2026-64940 is a high vulnerability published on August 10, 2026. Tegalog -Fumy Otegaru Memo Logger- provided by Nishishi Factory contains a vulnerability due to a permissive regular expression, which may allow an attacker who can access the affected product to log in to the management console. As a result, the attacker may perform any operations available from…
When was CVE-2026-64940 disclosed?
CVE-2026-64940 was first published in the National Vulnerability Database on August 10, 2026, with the most recent update on August 28, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2026-64940 actively exploited?
CVE-2026-64940 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 86.0% of all scored CVEs.
What is the CVSS score of CVE-2026-64940?
CVE-2026-64940 has a CVSS v3 base score of 8.6 (NVD).
How do I remediate CVE-2026-64940?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2026-64940, 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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