PULSE
ES
FEED
ransomwallstreet reclama a TGM Manufacturing, Inc · US · Manufacturingransomqilin reclama a Segres Systec · ES · Technologyransomqilin reclama a Shield Wall Systems of Florida · US · Government & Defenseransomqilin reclama a The Excalibur Group · US · Otherransomiah6477 reclama a hilmar-cheese · US · Agriculture and Food Productionransomn0n reclama a Company #70 · EG · Not Foundransomn0n reclama a Company #73 · Not Foundransomlockbit5 reclama a torcivialaw.com · IT · Professional Servicesransomlockbit5 reclama a kidzrkooldental.com · US · Healthcareransomlockbit5 reclama a lcww.com.eg · EG · Not Foundransomlockbit5 reclama a neweramachines.com · US · Manufacturingransomlockbit5 reclama a grupoabg.com · MX · Manufacturingransomqilin reclama a KD Corp · KR · Not Foundransomakira reclama a Videk · GB · Technologyransomwallstreet reclama a TGM Manufacturing, Inc · US · Manufacturingransomqilin reclama a Segres Systec · ES · Technologyransomqilin reclama a Shield Wall Systems of Florida · US · Government & Defenseransomqilin reclama a The Excalibur Group · US · Otherransomiah6477 reclama a hilmar-cheese · US · Agriculture and Food Productionransomn0n reclama a Company #70 · EG · Not Foundransomn0n reclama a Company #73 · Not Foundransomlockbit5 reclama a torcivialaw.com · IT · Professional Servicesransomlockbit5 reclama a kidzrkooldental.com · US · Healthcareransomlockbit5 reclama a lcww.com.eg · EG · Not Foundransomlockbit5 reclama a neweramachines.com · US · Manufacturingransomlockbit5 reclama a grupoabg.com · MX · Manufacturingransomqilin reclama a KD Corp · KR · Not Foundransomakira reclama a Videk · GB · Technology
← All CVEs
CVE Watch—

CVE-2021-22991

F5 BIG-IP Traffic Management Microkernel Buffer Overflow

CVSS

—

No CVSS

EPSS

61.1%

p99

KEV

YES

Jan 18, 2022

Exploit Today

80

0-100

Published: — · Last modified: —

EPSS · 30d
61.1%EPSS · 30 days61.1%
2026-09-172026-10-14
KEV catalog record

Product

F5 / BIG-IP Traffic Management Microkernel

Vulnerability

F5 BIG-IP Traffic Management Microkernel Buffer Overflow

Added to KEV

Jan 18, 2022

Remediate by

Feb 1, 2022

Known ransomware use

No

Summary description

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

Required action

Apply updates per vendor instructions.

Notes

https://nvd.nist.gov/vuln/detail/CVE-2021-22991

Related CVEs

No related CVEs by CWE or product.