CVE-2021-30760
HIGHCVSS 7.8/10EPSS 1.29%
Last modified
CVE-2021-30760 is a high-severity vulnerability rated 7.8/10 on the CVSS scale. An integer overflow was addressed through improved input validation. This issue is fixed in iOS 14.7, macOS Big Sur 11.5, watchOS 7.6, tvOS 14.7, Security Update 2021-005 Mojave, Security Update 2021-004 Catalina. EPSS estimates a 1.29% chance of exploitation in the next 30 days.
Description
An integer overflow was addressed through improved input validation. This issue is fixed in iOS 14.7, macOS Big Sur 11.5, watchOS 7.6, tvOS 14.7, Security Update 2021-005 Mojave, Security Update 2021-004 Catalina. Processing a maliciously crafted font file may lead to arbitrary code execution.
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 | < 14.7 |
| Apple | Iphone Os | < 14.7 |
| Apple | Mac Os X | 10.14 |
| Apple | Mac Os X | 10.14.0 |
| Apple | Mac Os X | 10.14.1 |
| Apple | Mac Os X | 10.14.2 |
| Apple | Mac Os X | 10.14.3 |
| Apple | Mac Os X | 10.14.4 |
| Apple | Mac Os X | 10.14.5 |
| Apple | Mac Os X | 10.14.6 |
| Apple | Mac Os X | 10.15 |
| Apple | Mac Os X | 10.15.1 |
| Apple | Mac Os X | 10.15.2 |
| Apple | Mac Os X | 10.15.3 |
| Apple | Mac Os X | 10.15.4 |
| Apple | Mac Os X | 10.15.5 |
| Apple | Mac Os X | 10.15.6 |
| Apple | Mac Os X | 10.15.7 |
| Apple | Macos | >= 11.0, < 11.5 |
| Apple | Tvos | < 14.7 |
| Apple | Watchos | < 7.6 |
References
- https://support.apple.com/en-us/HT212600Vendor Advisory
- https://support.apple.com/en-us/HT212601Vendor Advisory
- https://support.apple.com/en-us/HT212602Vendor Advisory
- https://support.apple.com/en-us/HT212603Vendor Advisory
- https://support.apple.com/en-us/HT212604Vendor Advisory
- https://support.apple.com/en-us/HT212605Vendor Advisory
- https://support.apple.com/en-us/HT212600Vendor Advisory
- https://support.apple.com/en-us/HT212601Vendor Advisory
- https://support.apple.com/en-us/HT212602Vendor Advisory
- https://support.apple.com/en-us/HT212603Vendor Advisory
- https://support.apple.com/en-us/HT212604Vendor Advisory
- https://support.apple.com/en-us/HT212605Vendor Advisory
Timeline
- Published
- Last Modified
- Status
- Modified
Frequently Asked Questions
What is CVE-2021-30760?
An integer overflow was addressed through improved input validation. This issue is fixed in iOS 14.7, macOS Big Sur 11.5, watchOS 7.6, tvOS 14.7, Security Update 2021-005 Mojave, Security Update 2021-004 Catalina. Processing a maliciously crafted font file may lead to arbitrary code execution.
How severe is CVE-2021-30760?
CVE-2021-30760 has a CVSS score of 7.8/10 (HIGH severity). The EPSS model estimates a 1.29% probability of exploitation in the next 30 days.
How do I fix CVE-2021-30760?
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.
- AI Penetration TestingHow AI-driven penetration testing continuously covers your attack surface.
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Are you affected by CVE-2021-30760?
Run a free Strix scan to check your systems for this vulnerability.
Scan your code nowSource: NVD / NIST