Risk Letters

Exploited vulnerability

CVE-2021-22991

TLP:CLEAR

F5 BIG-IP Traffic Management Microkernel Buffer Overflow

The Traffic Management Microkernel of BIG-IP ASM Risk Engine has a buffer overflow vulnerability, leading to a bypassing of URL-based access controls.

Facts

  • Vendor: F5
  • Product: BIG-IP Traffic Management Microkernel
  • CVSS: 9.8
  • EPSS (probability of exploitation within 30 days): 62.4 %
  • On CISA's Known Exploited Vulnerabilities list since: 18 January 2022
  • First known exploitation: 18 January 2022
  • CISA's deadline for US federal agencies: 1 February 2022
  • Weakness: CWE-119
  • First seen by Risk Letters: 18 January 2022

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