CVE-2021-30991
HIGHCVSS 7.8/10EPSS 1.07%
Last modified
CVE-2021-30991 is a high-severity vulnerability rated 7.8/10 on the CVSS scale. An out-of-bounds read was addressed with improved bounds checking. This issue is fixed in iOS 15.2 and iPadOS 15.2. EPSS estimates a 1.07% chance of exploitation in the next 30 days.
Description
An out-of-bounds read was addressed with improved bounds checking. This issue is fixed in iOS 15.2 and iPadOS 15.2. A malicious application may be able to execute arbitrary code with kernel privileges.
Metrics
CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H
Weakness Enumeration
Affected Software
| Vendor | Product | Versions |
|---|---|---|
| Apple | Ipados | < 15.2 |
| Apple | Iphone Os | < 15.2 |
References
Timeline
- Published
- Last Modified
- Status
- Modified
Frequently Asked Questions
What is CVE-2021-30991?
An out-of-bounds read was addressed with improved bounds checking. This issue is fixed in iOS 15.2 and iPadOS 15.2. A malicious application may be able to execute arbitrary code with kernel privileges.
How severe is CVE-2021-30991?
CVE-2021-30991 has a CVSS score of 7.8/10 (HIGH severity). The EPSS model estimates a 1.07% probability of exploitation in the next 30 days.
How do I fix CVE-2021-30991?
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.
How Strix Helps
- How Strix found a critical auth bypass in etcdStrix autonomously discovered a critical authentication bypass in etcd, later designated CVE-2026-33413.
- Autonomous PentestingAI agents that find and validate exploitable vulnerabilities like this one across your applications.
- PR ReviewsPentest every pull request so vulnerable code is caught before it ships to production.
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Are you affected by CVE-2021-30991?
Run a free Strix scan to check your systems for this vulnerability.
Scan your code nowSource: NVD / NIST