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CVE-2026-86907

MEDIUM 4.4

Published 2026-10-20 · Last modified 2026-10-20

An authorization issue was addressed with improved entitlement checks. This issue is fixed in macOS Sequoia 15.8, macOS Tahoe 26.7. An app with admin privileges may be able to modify the System Keychain.

NO EXPLOITATION SIGNALS

No known exploitation, public exploit, or elevated probability at this time. Track for changes.

Exploitation likelihood

0.2%chance of exploitation in 30 days · 4th percentile

○ In CISA KEV ○ Public exploit / PoC

Impact if exploited

4.4CVSS 3.1 · MEDIUM

  • ConfidentialityNone
  • IntegrityHigh
  • AvailabilityNone

What an attacker needs

  • ⚠Access: Requires local access to the host
  • ⚠Privileges: Requires an admin / high-privilege account
  • ✓User interaction: No user interaction needed
  • ✓Complexity: No special conditions — reliably repeatable

✓ lowers the bar for an attacker · ⚠ raises it

Proof of concept & exploit code

Test against your own equipment

curl -s https://vulnpedia.com/cve/CVE-2026-86907/poc.jsonMachine-readable PoC index for this CVE (for automation).

Listed for defensive triage, patch verification, and authorized testing on systems you own. Machine-readable: /cve/CVE-2026-86907/poc.json

Affected

Vendors Apple

Products Macos

Weakness (CWE)

  • CWE-862: Missing Authorization

CVSS vector

CVSS:3.1/AV:L/AC:L/PR:H/UI:N/S:U/C:N/I:H/A:N

All CVSS metrics

  • MEDIUM 4.4 v3.1 · ADP Primary
    CVSS:3.1/AV:L/AC:L/PR:H/UI:N/S:U/C:N/I:H/A:N
  • MEDIUM 4.4 v3.1 · NVD Secondary
    CVSS:3.1/AV:L/AC:L/PR:H/UI:N/S:U/C:N/I:H/A:N

References

Technical & other

Sources: NVD · CVE.org · EPSS