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CVE-2021-30860

7.8 · HIGHActively Exploited

An integer overflow was addressed with improved input validation.

Published Aug 24, 2021CWE-190EPSS 75.99%

Overview

CVE-2021-30860 is a high-severity vulnerability. It was published on August 24, 2021 and has a CVSS 3.1 base score of 7.8 (HIGH). This vulnerability is listed in CISA's Known Exploited Vulnerabilities catalog, indicating active exploitation in the wild.

This vulnerability has a CVSS 3.1 base score of 7.8, rated HIGH. It requires local or adjacent network access to exploit. No authentication or special privileges are required for exploitation.

Technical description

An integer overflow was addressed with improved input validation. This issue is fixed in Security Update 2021-005 Catalina, iOS 14.8 and iPadOS 14.8, macOS Big Sur 11.6, watchOS 7.6.2. Processing a maliciously crafted PDF may lead to arbitrary code execution. Apple is aware of a report that this issue may have been actively exploited.

Remediation

Check the references section for vendor advisories, patches, and mitigation guidance. If immediate patching is not possible, review the CVSS vector to understand the attack surface and apply compensating controls such as network segmentation or access restrictions.

References

Refseclists.org/fulldisclosure/2021/Sep/25Refseclists.org/fulldisclosure/2021/Sep/26Refseclists.org/fulldisclosure/2021/Sep/27Refseclists.org/fulldisclosure/2021/Sep/28Refseclists.org/fulldisclosure/2021/Sep/38Refseclists.org/fulldisclosure/2021/Sep/39Refseclists.org/fulldisclosure/2021/Sep/40Refseclists.org/fulldisclosure/2021/Sep/50Refwww.openwall.com/lists/oss-security/2022/09/02/11Refsecurity.gentoo.org/glsa/202209-21

How CyberStrike helps

Frequently asked questions

What is CVE-2021-30860?

CVE-2021-30860 is a high-severity vulnerability. It was published on August 24, 2021 and has a CVSS 3.1 base score of 7.8 (HIGH). This vulnerability is listed in CISA's Known Exploited Vulnerabilities catalog, indicating active exploitation in the wild.

How severe is CVE-2021-30860?

This vulnerability has a CVSS 3.1 base score of 7.8, rated HIGH. It requires local or adjacent network access to exploit. No authentication or special privileges are required for exploitation.

How do I fix or remediate CVE-2021-30860?

Check the references section for vendor advisories, patches, and mitigation guidance. If immediate patching is not possible, review the CVSS vector to understand the attack surface and apply compensating controls such as network segmentation or access restrictions.

How can CyberStrike help with CVE-2021-30860?

CyberStrike is an open-source, AI-augmented pentesting engine. Rather than flag a version number, it tests whether an issue like CVE-2021-30860 is actually reachable in your own applications and APIs, then verifies each finding before reporting it. That tells you if the weakness is a real, exploitable risk in your environment or a false positive you can safely deprioritize.

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