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 mitigationSerious severity, but no confirmed exploitation yet.
  • High severity, but no confirmed exploitation yet
CISA-KEV: Not listedEPSS PROB: 0.4%CVSS: 8.6Exploit: None knownExposed services: Not assessed

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

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
8.6HIGHmedium confidence
EG Risk
54
EG Risk 54/100CISA SSVC

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%
CISA SSVC: Track at low or medium mission impact; Attend at high (mission-essential systems).
Action: No fix is confirmed yet. Restrict network exposure of the affected system or apply the vendor's mitigation within your standard update timelines at low or medium mission impact and sooner than that at high, and watch the vendor's advisory for the fix.
EPSS PROB
0.4%
EPSS %ILE
31st
KEV
Not listed

CISA SSVCTrack at low or medium mission impact; Attend at high (mission-essential systems).

No fix is confirmed yet. Restrict network exposure of the affected system or apply the vendor's mitigation within your standard update timelines at low or medium mission impact and sooner than that at high, and watch the vendor's advisory for the fix.

Exploitation none (CISA Vulnrichment) · Automatable yes (CISA Vulnrichment) · Technical impact partial (CISA Vulnrichment). Mission impact is CISA's Mission & Well-being decision point, and only you can judge it: high means the affected system is essential to your organisation's mission, or its compromise could cause irreversible harm to people. CISA's decision table

Published

August 10, 2026

Last Modified

August 28, 2026

Advisory Details (2)

Auto-updated Aug 10, 2026
No fix on record 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 14× in last 7d / 82× 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 200 total refreshes for this CVE.

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

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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 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 0.4% probability of exploitation in the next 30 days (31st percentile of EPSS-scored CVEs).
What is the CVSS score of CVE-2026-64940?
CVE-2026-64940 has a CVSS base score of 8.6 (a secondary CVSS source that NVD displays; NVD's own analysis pending).
How do I remediate CVE-2026-64940?
No fix for CVE-2026-64940 is confirmed yet. Until one is published, restrict network exposure of the affected system or apply the vendor's mitigation — for example, keep it off the internet or limit it to trusted networks — and watch the vendor's advisory for the fix. The vendor advisories EchelonGraph has for CVE-2026-64940 are linked in the Vendor Advisories panel on this page.

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