CVE-2026-28858
CRITICALCVSS 9.8/10EPSS 0.53%
Last modified
CVE-2026-28858 is a critical-severity vulnerability rated 9.8/10 on the CVSS scale. A buffer overflow was addressed with improved bounds checking. This issue is fixed in iOS 26.4 and iPadOS 26.4. EPSS estimates a 0.53% chance of exploitation in the next 30 days.
Description
A buffer overflow was addressed with improved bounds checking. This issue is fixed in iOS 26.4 and iPadOS 26.4. A remote user may be able to cause unexpected system termination or corrupt kernel memory.
Metrics
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Weakness Enumeration
Affected Software
| Vendor | Product | Versions |
|---|---|---|
| Apple | Ipados | < 26.4 |
| Apple | Iphone Os | < 26.4 |
References
- https://support.apple.com/en-us/126792Vendor Advisory
Timeline
- Published
- Last Modified
- Status
- Analyzed
Frequently Asked Questions
What is CVE-2026-28858?
A buffer overflow was addressed with improved bounds checking. This issue is fixed in iOS 26.4 and iPadOS 26.4. A remote user may be able to cause unexpected system termination or corrupt kernel memory.
How severe is CVE-2026-28858?
CVE-2026-28858 has a CVSS score of 9.8/10 (CRITICAL severity). The EPSS model estimates a 0.53% probability of exploitation in the next 30 days.
How do I fix CVE-2026-28858?
Check the vendor references and advisories linked above for patched versions and mitigation guidance. You can also run a Strix scan to test if your systems are affected.
Are you affected by CVE-2026-28858?
Run a free Strix scan to check your systems for this vulnerability.
Scan your code nowSource: NVD / NIST