Risk Letters

Exploited vulnerability

CVE-2021-30952

TLP:CLEAR

Apple Multiple Products Integer Overflow or Wraparound Vulnerability

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.

Facts

  • Vendor: Apple
  • Product: Multiple Products
  • CVSS: 7.8
  • EPSS (probability of exploitation within 30 days): 7 %
  • On CISA's Known Exploited Vulnerabilities list since: 5 March 2026
  • First known exploitation: 5 March 2026
  • CISA's deadline for US federal agencies: 26 March 2026
  • Weakness: CWE-190
  • First seen by Risk Letters: 5 March 2026

Members see which Nordic sectors the flaw hits, and what to do about it.

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Data: NVD (public domain), CISA KEV, FIRST EPSS, MITRE ATT&CK, AlienVault OTX. NVD