CVE-2021-22277: Abb 800xa

High severity, CVSS 7.5. EPSS: 0.9% chance of exploitation in the next 30 days.

Improper Input Validation vulnerability in ABB 800xA, Control Software for AC 800M, Control Builder Safe, Compact Product Suite - Control and I/O, ABB Base Software for SoftControl allows an attacker to cause the denial of service.

Affected products

• Abb 800xa: from 5.1.0-0, up to and including 5.1.0-3; from 5.1.1-0, up to and including 5.1.1-4; from 6.0.0-0, before 6.0.0-4 (fixed in 6.0.0-4); from 6.1.0-0, before 6.1.1-2 (fixed in 6.1.1-2)
• Abb Base Software: from 5.1.0-0, up to and including 5.1.0-3; from 5.1.1-0, up to and including 5.1.1-4; from 6.0.0-0, up to and including 6.0.0-3; from 6.1.0-0, up to and including 6.1.1-1
• Abb Compact Product Suite: from 5.1.0-0, up to and including 5.1.0-3; from 5.1.1-0, up to and including 5.1.1-4; from 6.0.0-0, up to and including 6.0.0-3; from 6.1.0-0, up to and including 6.1.1-1
• Abb Control Builder Safe: before 3.0 (fixed in 3.0)

Published 2022-04-01. Last modified 2026-06-17.