CSIRTS // UNIFIED SECURITY ADVISORY FEEDSYS ● ONLINE · POWERED BY INTELFUSIONS.COM

← Back to feed

CVE-2021-30952: Apple Multiple Products Integer Overflow or Wraparound Vulnerability

criticalknown exploitedCVE-2021-30952
Actively exploited. At least one CVE in this advisory is listed in the CISA Known Exploited Vulnerabilities catalog — exploitation has been observed in the wild. Treat remediation as urgent.
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.

CSIRTS triage

vendor: AppleRemote code execution
What
The vulnerability may lead to arbitrary code execution due to integer overflow or wraparound in processing web content.
Who is affected
Users of Apple tvOS, macOS, Safari, iPadOS, and watchOS are affected.
Urgency
Immediate action is required due to active exploitation and critical severity.
Action
Update all affected Apple products to the latest versions.

AI-assisted analysis generated from the source advisory — verify against the original.

Details

Source
CISA Known Exploited Vulnerabilities (US · database · site)
Severity
critical
Published
2026-03-05
Exploitation
Observed in the wild (CISA KEV)

Original advisory: https://nvd.nist.gov/vuln/detail/CVE-2021-30952

Exploitation outlook

EPSS (FIRST.org) estimates each CVE’s probability of exploitation in the next 30 days — here is the CSIRTS.com read on those numbers.

Referenced CVEs

CVECSIRTS overviewExternal
CVE-2021-30952coverage & exploitation statusNVD · CVE.org

More from CISA Known Exploited Vulnerabilities