CVE-2026-66061

HIGHPre-NVD 7.17.1—
EchelonGraph scoreMEDIUM confidence

This high-severity CVE scores 7.1 under a secondary CVSS source (NVD's own analysis pending). EPSS exploit probability: 0.1%, top 98% of all CVEs by exploit prediction. GitHub Security Advisory data not yet ingested — confidence will rise once GHSA publishes (typical lag: hours to days for open-source ecosystem CVEs; never for infrastructure-only CVEs).

Triggered by: NVD CVSS baseline
Sources: epss, secondary
Elevated
7.1EG
EchelonGraph verdictPlan a fixSerious severity, but no confirmed exploitation yet.
  • High severity, but no confirmed exploitation yet
CISA-KEV: Not listedEPSS PROB: 0%CVSS: 7.1Exploit: Elevated riskExposed: 0

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

Home Assistant is open source home automation software focused on local control and privacy. Prior to 2026.5.0, the iOS Companion app treats tag links (NFC or QR) delivered through an OS-level routing mechanism such as iOS universal links as if they were physically scanned, without validating the calling app or prompting the user. As a result, any untrusted app on the device can forward an arbitrary tag to Home Assistant, causing it to execute the associated automation as though a legitimate user had scanned an authorized tag. This allows silent, unattended automation execution by untrusted local callers. This issue has been fixed in version 2026.5.0.

CVSS v3
7.1
EG Score
7.1(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
Severity71% × 45%
Exploitation40% × 40%
Automatability0% × 15%
Action: Routine — remediate on your standard cadence.
EPSS PROB
0%
EPSS %ILE
2%
KEV
Not listed

Published

August 7, 2026

Last Modified

August 10, 2026

Advisory Details (2)

Auto-updated Aug 7, 2026
🔬 Proof of concept available. Patch available. Sources: github, github_commit.
github_commit Patch Available

commit 45e05e6666c7 (home-assistant/iOS)

Patch available: home-assistant/iOS release/2026.7.0/2026.2208 (contains commit 45e05e6666c7)

https://github.com/home-assistant/iOS/commit/45e05e6666c74fdbea44cc4d6fb103043fff6fd9
github Patch Available🟡 PoC Available

Companion app (iOS) forwards NFC/QR tag scans to Home Assistant without user confirmation, allowing silent automation execution by untrusted callers · Advisory · home-assistant/core · GitHub

https://github.com/home-assistant/core/security/advisories/GHSA-j23v-9672-677j

Weakness Classification(1)

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

Data Freshness Timeline

(refreshed 8× in last 7d / 37× 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. 2026-08-29 10:21 UTCEG score recompute
  2. 2026-08-28 21:42 UTCEPSS rescore
  3. 2026-08-27 23:43 UTCEG score recompute
  4. 2026-08-26 21:39 UTCEG score recompute
  5. 2026-08-26 14:47 UTCEPSS rescore
  6. 2026-08-25 19:38 UTCEG score recompute
  7. 2026-08-25 13:49 UTCEPSS rescore
  8. 2026-08-24 17:32 UTCEG score recompute
  9. 2026-08-23 01:59 UTCEG score recompute
  10. 2026-08-23 00:19 UTCEPSS rescore
  11. 2026-08-21 10:58 UTCEG score recompute
  12. 2026-08-20 22:56 UTCEPSS rescore
  13. 2026-08-18 17:51 UTCEG score recompute
  14. 2026-08-18 13:48 UTCEPSS rescore
  15. 2026-08-17 15:40 UTCEG score recompute
  16. 2026-08-17 13:47 UTCEPSS rescore
  17. 2026-08-17 02:40 UTCEG score recompute
  18. 2026-08-16 14:56 UTCEPSS rescore
  19. 2026-08-16 13:40 UTCEG score recompute
  20. 2026-08-15 11:40 UTCEG score recompute
  21. 2026-08-15 01:30 UTCEPSS rescore
  22. 2026-08-14 09:39 UTCEG score recompute
  23. 2026-08-13 22:00 UTCEPSS rescore
  24. 2026-08-12 18:38 UTCEG score recompute
  25. 2026-08-12 13:51 UTCEPSS rescore
Show 12 more
  1. 2026-08-11 16:30 UTCEG score recompute
  2. 2026-08-11 03:30 UTCEG score recompute
  3. 2026-08-11 00:00 UTCEPSS rescore
  4. 2026-08-10 14:30 UTCEG score recompute
  5. 2026-08-10 14:06 UTCEG score recompute
  6. 2026-08-10 01:32 UTCEG score recompute
  7. 2026-08-09 13:47 UTCEPSS rescore
  8. 2026-08-08 23:32 UTCEG score recompute
  9. 2026-08-08 16:37 UTCEPSS rescore
  10. 2026-08-07 21:32 UTCEG score recompute
  11. 2026-08-07 21:02 UTCEG score recompute
  12. 2026-08-07 21:02 UTCMITRE cvelistV5first tracked

Related CVEs(same CWE)

Frequently asked(5)

What is CVE-2026-66061?
CVE-2026-66061 is a high vulnerability published on August 7, 2026. Home Assistant is open source home automation software focused on local control and privacy. Prior to 2026.5.0, the iOS Companion app treats tag links (NFC or QR) delivered through an OS-level routing mechanism such as iOS universal links as if they were physically scanned, without validating the…
When was CVE-2026-66061 disclosed?
CVE-2026-66061 was first published in the National Vulnerability Database on August 7, 2026, with the most recent update 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-2026-66061 actively exploited?
CVE-2026-66061 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 98.4% of all scored CVEs.
What is the CVSS score of CVE-2026-66061?
CVE-2026-66061 has a CVSS v3 base score of 7.1 (NVD).
How do I remediate CVE-2026-66061?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2026-66061, 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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