PatchTheCVECVE-2026-86879: A denial-of-service issue was addressed with improved input validation
CVE-2026-86879 is a medium-severity flaw (CVSS 6.5) affecting ipados, iphone os. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.
A denial-of-service issue was addressed with improved input validation. This issue is fixed in iOS 27 and iPadOS 27. A remote attacker may be able to cause a denial-of-service.
Why this priority
- No elevated risk signals yet
A fixed release or distro patch exists.
Risk facts
| CVSS score | 6.5 (Medium) |
| Attack vector | Network (remote) |
| Attack complexity | Low |
| Privileges needed | None |
| User interaction | Required |
| EPSS exploit chance | 0.4% (top 67%) |
| CISA exploited list | No |
| Weakness | CWE-20 |
| Published | 2026-09-14 |
| Last modified | 2026-09-15 |
Last updated 2026-09-15 · Sources: CVE Program, NVD, CISA KEV, EPSS and vendor advisories · How we score
Am I affected?
Timeline
- Published CVE record published
- Updated Record last modified
Scores and fixes here are computed automatically from those and other public sources. Confirm with the vendor advisory before changing production systems.
Quick answers
How do I fix CVE-2026-86879?
ipados: upgrade to 27.0; iphone os: upgrade to 27.0. Exact commands for each OS are on this page.
Is CVE-2026-86879 being exploited?
CVE-2026-86879 is not on the CISA Known Exploited Vulnerabilities list at the time of the last update. Check again, as this can change.
What does CVE-2026-86879 affect?
CVE-2026-86879 affects ipados, iphone os. Severity is medium (CVSS 6.5). A denial-of-service issue was addressed with improved input validation. This issue is fixed in iOS 27 and iPadOS 27. A remote attacker may be able to cause a denial-of-service.
How urgent is CVE-2026-86879?
Priority 31/100. No elevated risk signals yet.
Software pages
iOS vulnerabilities · iPadOS vulnerabilities
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