Risk Letters

Exploited vulnerability

CVE-2021-1871

TLP:CLEAR

Apple iOS, iPadOS, and macOS WebKit Remote Code Execution Vulnerability

Apple iOS, iPadOS, and macOS WebKit contain an unspecified logic vulnerability that allows a remote attacker to execute code. This vulnerability could impact HTML parsers that use WebKit, including but not limited to Apple Safari and non-Apple products which rely on WebKit for HTML processing.

Facts

  • Vendor: Apple
  • Product: iOS, iPadOS, and macOS
  • CVSS: 9.8
  • EPSS (probability of exploitation within 30 days): 7 %
  • On CISA's Known Exploited Vulnerabilities list since: 3 November 2021
  • First known exploitation: 3 November 2021
  • CISA's deadline for US federal agencies: 17 November 2021
  • Weakness: CWE-1173
  • First seen by Risk Letters: 3 November 2021

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

Get the full brief

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