CVE-2026-20021

score

<0.1

cvss

4.3

epss

0.2%

published

2026-03-04

kev added

—

first seen

2026-10-21

Cisco Secure Firewall ASA and FTD Software contain a denial of service vulnerability caused by improper input validation in the OSPF protocol when parsing packets, letting authenticated adjacent attackers exhaust memory, exploit requires adjacency.