CVE-2026-64940

HIGHPre-NVD 8.68.6—
EchelonGraph scoreHIGH 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(high)
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
33%
KEV
Not listed

Published

August 10, 2026

Last Modified

August 10, 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 28× in last 7d / 46× 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.

  1. 2026-08-20 17:23 UTCGHSA enrichment
  2. 2026-08-20 06:02 UTCGHSA enrichment
  3. 2026-08-19 18:45 UTCEG score recompute
  4. 2026-08-19 18:45 UTCGHSA enrichment
  5. 2026-08-19 17:04 UTCEPSS rescore
  6. 2026-08-19 05:27 UTCGHSA enrichment
  7. 2026-08-18 18:11 UTCEG score recompute
  8. 2026-08-18 18:10 UTCGHSA enrichment
  9. 2026-08-18 13:48 UTCEPSS rescore
  10. 2026-08-18 06:53 UTCGHSA enrichment
  11. 2026-08-17 19:36 UTCEG score recompute
  12. 2026-08-17 19:36 UTCGHSA enrichment
  13. 2026-08-17 13:47 UTCEPSS rescore
  14. 2026-08-17 08:19 UTCGHSA enrichment
  15. 2026-08-16 21:03 UTCEG score recompute
  16. 2026-08-16 21:03 UTCGHSA enrichment
  17. 2026-08-16 14:56 UTCEPSS rescore
  18. 2026-08-16 09:46 UTCEG score recompute
  19. 2026-08-16 09:46 UTCGHSA enrichment
  20. 2026-08-15 22:30 UTCGHSA enrichment
  21. 2026-08-15 11:13 UTCEG score recompute
  22. 2026-08-15 11:13 UTCGHSA enrichment
  23. 2026-08-15 01:30 UTCEPSS rescore
  24. 2026-08-14 23:56 UTCGHSA enrichment
  25. 2026-08-14 12:39 UTCGHSA enrichment
Show 21 more
  1. 2026-08-14 01:23 UTCEG score recompute
  2. 2026-08-14 01:23 UTCGHSA enrichment
  3. 2026-08-13 22:00 UTCEPSS rescore
  4. 2026-08-13 14:06 UTCGHSA enrichment
  5. 2026-08-13 02:49 UTCGHSA enrichment
  6. 2026-08-12 15:33 UTCEG score recompute
  7. 2026-08-12 15:33 UTCGHSA enrichment
  8. 2026-08-12 13:51 UTCEPSS rescore
  9. 2026-08-12 04:16 UTCGHSA enrichment
  10. 2026-08-11 16:59 UTCEG score recompute
  11. 2026-08-11 16:59 UTCGHSA enrichment
  12. 2026-08-11 05:42 UTCEG score recompute
  13. 2026-08-11 05:42 UTCGHSA enrichment
  14. 2026-08-11 00:00 UTCEPSS rescore
  15. 2026-08-10 18:26 UTCEG score recompute
  16. 2026-08-10 18:26 UTCGHSA enrichment
  17. 2026-08-10 17:55 UTCEG score recompute
  18. 2026-08-10 17:55 UTCGHSA enrichment
  19. 2026-08-10 08:20 UTCEG score recompute
  20. 2026-08-10 07:41 UTCEG score recompute
  21. 2026-08-10 07:41 UTCMITRE cvelistV5first tracked

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. 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 66.8% 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.

Dependency Blast Radius

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