CVE-2026-43664

MEDIUMPre-NVD 5.55.5—
EchelonGraph scoreHIGH confidence

Score 5.5 from GitHub Security Advisory published 2026-09-14. CISA-ADP (Vulnrichment) CVSS v3.1 baseline 5.5; sources differ by 0.0.

Triggered by: GitHub Security Advisory CVSS
Sources: cisa-adp, epss, ghsa
Trending — 3 sources updated this week
5.5EG
EchelonGraph verdictMonitorLow exploitation likelihood right now — keep watching.
  • Lower severity and no public exploit yet
CISA-KEV: Not listedEPSS PROB: 0.2%CVSS: 5.5Exploit: None knownExposed services: Not assessed

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

This issue was addressed with improved data protection. This issue is fixed in iOS 26.7 and iPadOS 26.7, iOS 27 and iPadOS 27, macOS Golden Gate 27, macOS Sequoia 15.8, macOS Tahoe 26.7, tvOS 27, watchOS 27. An app may be able to access sensitive user data.

CVSS v3
5.5
EG Score
5.5MEDIUMhigh confidence
EG Risk
25
EG Risk 25/100CISA 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
Severity55% × 45%
Exploitation0% × 40%
Automatability0% × 15%
CISA SSVC: Track at every mission impact level.
Action: No fix is confirmed yet. Restrict network exposure of the affected system or apply the vendor's mitigation within your standard update timelines, and watch the vendor's advisory for the fix.
EPSS PROB
0.2%
EPSS %ILE
5th
KEV
Not listed

CISA SSVCTrack at every mission impact level.

No fix is confirmed yet. Restrict network exposure of the affected system or apply the vendor's mitigation within your standard update timelines, and watch the vendor's advisory for the fix.

Exploitation none (CISA Vulnrichment) · Automatable no (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

September 14, 2026

Last Modified

September 15, 2026

Advisory Details (7)

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

About the security content of macOS Sequoia 15.8 - Apple Support

https://support.apple.com/en-us/149043
generic

About the security content of macOS Tahoe 26.7 - Apple Support

https://support.apple.com/en-us/149042
generic

About the security content of iOS 26.7 and iPadOS 26.7 - Apple Support

https://support.apple.com/en-us/149041
generic

About the security content of watchOS 27 - Apple Support

https://support.apple.com/en-us/149037
generic

About the security content of tvOS 27 - Apple Support

https://support.apple.com/en-us/149036
generic

About the security content of macOS Golden Gate 27 - Apple Support

https://support.apple.com/en-us/149035
generic

About the security content of iOS 27 and iPadOS 27 - Apple Support

https://support.apple.com/en-us/149034

Vendor Advisories for CVE-2026-43664(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 17× in last 7d / 55× 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. 2026-10-04 01:47 UTCEG score recompute
  2. 2026-10-04 01:47 UTCGHSA enrichment
  3. 2026-10-03 14:25 UTCEPSS rescore
  4. 2026-10-03 01:42 UTCEG score recompute
  5. 2026-10-03 01:42 UTCGHSA enrichment
  6. 2026-10-02 01:37 UTCEG score recompute
  7. 2026-10-02 01:37 UTCGHSA enrichment
  8. 2026-10-01 19:50 UTCEPSS rescore
  9. 2026-10-01 01:30 UTCEG score recompute
  10. 2026-10-01 01:30 UTCGHSA enrichment
  11. 2026-09-30 15:03 UTCEPSS rescore
  12. 2026-09-30 01:25 UTCEG score recompute
  13. 2026-09-30 01:25 UTCGHSA enrichment
  14. 2026-09-28 22:57 UTCEG score recompute
  15. 2026-09-28 22:57 UTCGHSA enrichment
  16. 2026-09-27 22:50 UTCEG score recompute
  17. 2026-09-27 22:50 UTCGHSA enrichment
  18. 2026-09-27 13:48 UTCEPSS rescore
  19. 2026-09-26 22:45 UTCEG score recompute
  20. 2026-09-26 22:45 UTCGHSA enrichment
  21. 2026-09-26 15:58 UTCEPSS rescore
  22. 2026-09-25 22:39 UTCGHSA enrichment
  23. 2026-09-24 21:56 UTCEG score recompute
  24. 2026-09-24 21:55 UTCGHSA enrichment
  25. 2026-09-23 21:47 UTCEG score recompute
Show 30 more
  1. 2026-09-23 21:47 UTCGHSA enrichment
  2. 2026-09-23 17:53 UTCEPSS rescore
  3. 2026-09-22 21:42 UTCEG score recompute
  4. 2026-09-22 21:42 UTCGHSA enrichment
  5. 2026-09-21 21:37 UTCEG score recompute
  6. 2026-09-21 21:37 UTCGHSA enrichment
  7. 2026-09-20 21:32 UTCEG score recompute
  8. 2026-09-20 21:32 UTCGHSA enrichment
  9. 2026-09-20 20:15 UTCEPSS rescore
  10. 2026-09-19 21:26 UTCEG score recompute
  11. 2026-09-19 21:26 UTCGHSA enrichment
  12. 2026-09-18 21:21 UTCEG score recompute
  13. 2026-09-18 21:21 UTCGHSA enrichment
  14. 2026-09-18 19:28 UTCEPSS rescore
  15. 2026-09-17 21:17 UTCEG score recompute
  16. 2026-09-17 21:17 UTCGHSA enrichment
  17. 2026-09-17 19:31 UTCEPSS rescore
  18. 2026-09-16 21:12 UTCEG score recompute
  19. 2026-09-16 21:12 UTCGHSA enrichment
  20. 2026-09-16 14:08 UTCEPSS rescore
  21. 2026-09-16 05:15 UTCEPSS rescore
  22. 2026-09-15 20:46 UTCGHSA enrichment
  23. 2026-09-15 19:39 UTCGHSA enrichment
  24. 2026-09-15 18:24 UTCEG score recompute▲ 5.50
  25. 2026-09-15 18:23 UTCGHSA enrichment
  26. 2026-09-15 18:22 UTCMITRE cvelistV5CVSS v3 → 5.5 · severity → MEDIUM
  27. 2026-09-15 14:55 UTCGHSA enrichment
  28. 2026-09-14 21:22 UTCNVD update
  29. 2026-09-14 20:56 UTCEG score recompute
  30. 2026-09-14 20:54 UTCMITRE cvelistV5first tracked

Related CVEs(same CWE)

Frequently asked(5)

What is CVE-2026-43664?
CVE-2026-43664 is a medium vulnerability published on September 14, 2026. This issue was addressed with improved data protection. This issue is fixed in iOS 26.7 and iPadOS 26.7, iOS 27 and iPadOS 27, macOS Golden Gate 27, macOS Sequoia 15.8, macOS Tahoe 26.7, tvOS 27, watchOS 27. An app may be able to access sensitive user data.
When was CVE-2026-43664 disclosed?
CVE-2026-43664 was first published on September 14, 2026, with the most recent update on September 15, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2026-43664 actively exploited?
CVE-2026-43664 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 0.2% probability of exploitation in the next 30 days (5th percentile of EPSS-scored CVEs).
What is the CVSS score of CVE-2026-43664?
CVE-2026-43664 has a CVSS v3.1 base score of 5.5 (CISA-ADP / Vulnrichment enrichment; NVD's own analysis pending).
How do I remediate CVE-2026-43664?
No fix for CVE-2026-43664 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-2026-43664 are linked in the Vendor Advisories panel on this page.

Dependency Blast Radius

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