Actively exploited
Listed in CISA’s Known Exploited Vulnerabilities catalog since March 5, 2026.
CVE-2021-30952
Apple Multiple Products Integer Overflow or Wraparound Vulnerability
Added to KEV March 5, 2026
Alert details
- Source feed
- CISA KEV
- CVE ID
- CVE-2021-30952
- CWE
- CWE-190
- Affected products
- Multiple Products · Apple Multiple Products · Apple
What happened
Apple tvOS, macOS, Safari, iPadOS and watchOS contain an integer overflow or wraparound vulnerability due to the processing of maliciously crafted web content that may lead to arbitrary code execution.
What it means for your business
Apple Multiple Products is listed in CISA's Known Exploited Vulnerabilities catalog (CVE-2021-30952). Apple tvOS, macOS, Safari, iPadOS and watchOS contain an integer overflow or wraparound vulnerability due to the processing of maliciously crafted web content that may lead to arbitrary code execution. CISA remediation due date: 2026-03-26. If you need help checking exposure, call (864) 335-9223.
Required action
Apply mitigations per vendor instructions, follow applicable BOD 22-01 guidance for cloud services, or discontinue use of the product if mitigations are unavailable.
CISA due date: March 26, 2026
Sources
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