CVE-2021-34783

score

<0.1

cvss

8.6

epss

1.6%

published

2021-10-27

kev added

—

first seen

2026-10-21

Cisco ASA and FTD Software contain a denial of service caused by insufficient validation of SSL/TLS messages in the software-based message handler, letting unauthenticated remote attackers cause device reload, exploit requires sending crafted SSL/TLS messages.