Is CVE-2021-22275 actively exploited?

No active exploitation of CVE-2021-22275 has been confirmed so far. Continue monitoring, as exploit status can change.

Can CVE-2021-22275 be exploited remotely?

Yes. CVE-2021-22275 is exploitable remotely over the network (CVSS attack vector: Network).

What is the CVSS score of CVE-2021-22275?

CVE-2021-22275 has a CVSS score of 8.6 (HIGH).

HOME VULNERABILITIESCVE-2021-22275

HIGH

CVE-2021-22275

CWE-120Published: May 13, 2022· Updated: Jun 17, 2026

8.6

CVSS v3.1

Official Description

Buffer Overflow vulnerability in B&R Automation Runtime webserver allows an unauthenticated network-based attacker to stop the cyclic program on the device and cause a denial of service.

NVD Source

Technical Analysis

CVE-2021-22275 can be exploited remotely over the network without requiring physical or adjacent access, significantly expanding the attack surface for threat actors.

The vulnerability requires no privileges and no user interaction, making it a prime target for automated exploitation campaigns and worm-like propagation.

A successful exploit results in availability disruption (denial of service), with a CVSS base score of 8.6.

The vulnerability has a "Changed" scope, meaning successful exploitation can impact components beyond the vulnerable component itself — such as the host operating system or adjacent services.