CVE-2021-1851
HIGHCVSS 8.8/10EPSS 2.13%
Last modified
CVE-2021-1851 is a high-severity vulnerability rated 8.8/10 on the CVSS scale. A logic issue was addressed with improved state management. This issue is fixed in Security Update 2021-002 Catalina, Security Update 2021-003 Mojave, iOS 14.5 and iPadOS 14.5, watchOS 7.4, tvOS 14.5, macOS Big Sur 11.3. EPSS estimates a 2.13% chance of exploitation in the next 30 days.
Description
A logic issue was addressed with improved state management. This issue is fixed in Security Update 2021-002 Catalina, Security Update 2021-003 Mojave, iOS 14.5 and iPadOS 14.5, watchOS 7.4, tvOS 14.5, macOS Big Sur 11.3. An application may be able to execute arbitrary code with kernel privileges.
Metrics
Weakness Enumeration
Affected Software
| Vendor | Product | Versions |
|---|---|---|
| Apple | Ipados | < 14.5 |
| Apple | Iphone Os | < 14.5 |
| 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, < 11.3 |
| Apple | Tvos | < 14.5 |
| Apple | Watchos | < 7.4 |
References
- https://support.apple.com/en-us/HT212317Vendor Advisory
- https://support.apple.com/en-us/HT212323Vendor Advisory
- https://support.apple.com/en-us/HT212324Vendor Advisory
- https://support.apple.com/en-us/HT212325Vendor Advisory
- https://support.apple.com/en-us/HT212326Vendor Advisory
- https://support.apple.com/en-us/HT212327Vendor Advisory
- https://support.apple.com/en-us/HT212317Vendor Advisory
- https://support.apple.com/en-us/HT212323Vendor Advisory
- https://support.apple.com/en-us/HT212324Vendor Advisory
- https://support.apple.com/en-us/HT212325Vendor Advisory
- https://support.apple.com/en-us/HT212326Vendor Advisory
- https://support.apple.com/en-us/HT212327Vendor Advisory
Timeline
- Published
- Last Modified
- Status
- Modified
Frequently Asked Questions
What is CVE-2021-1851?
A logic issue was addressed with improved state management. This issue is fixed in Security Update 2021-002 Catalina, Security Update 2021-003 Mojave, iOS 14.5 and iPadOS 14.5, watchOS 7.4, tvOS 14.5, macOS Big Sur 11.3. An application may be able to execute arbitrary code with kernel privileges.
How severe is CVE-2021-1851?
CVE-2021-1851 has a CVSS score of 8.8/10 (HIGH severity). The EPSS model estimates a 2.13% probability of exploitation in the next 30 days.
How do I fix CVE-2021-1851?
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.
Related CVEs from 2021
- CVE-2021-1843This issue was addressed with improved checks. This issue is…7.8
- CVE-2021-1844A memory corruption issue was addressed with improved valida…8.8
- CVE-2021-1846Processing a maliciously crafted audio file may disclose res…5.5
- CVE-2021-1847A memory corruption issue was addressed with improved valida…7.8
- CVE-2021-1848The issue was addressed with improved UI handling. This issu…5.5
- CVE-2021-1849An issue in code signature validation was addressed with imp…7.5
- CVE-2021-1852An out-of-bounds read was addressed with improved input vali…5.5
- CVE-2021-1853A logic issue was addressed with improved state management. …7.8
- CVE-2021-1854A call termination issue with was addressed with improved lo…4.3
- CVE-2021-1855A logic issue was addressed with improved state management. …6.5
- CVE-2021-1857A memory initialization issue was addressed with improved me…6.5
- CVE-2021-1858Processing a maliciously crafted image may lead to arbitrary…7.8
Are you affected by CVE-2021-1851?
Run a free Strix scan to check your systems for this vulnerability.
Scan your code nowSource: NVD / NIST