How severe is CVE-2021-22275?

CVE-2021-22275 has a CVSS 3.x base score of 8.6, rated high severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is none, integrity none, and availability high.

Is CVE-2021-22275 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (55th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2021-22275?

CVE-2021-22275 affects Br-automation Automation Runtime. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2021-22275?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its high severity, prioritise patching exposed systems.

When was CVE-2021-22275 published?

CVE-2021-22275 was published on 2022-05-13 and last updated on 2026-06-17.

CVE-2021-22275

CVE-2021-22275 is a high-severity vulnerability in Br-automation Automation Runtime with a CVSS 3.x base score of 8.6. It is not currently listed as actively exploited by CISA, and its EPSS exploit-prediction score is low. The underlying weakness is classified as CWE-120.

Key facts

Severity: High (CVSS 3.x base score 8.6)
CVSS v2: 7.8
EPSS exploit prediction: 1% (55th percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-120
Affected product: Br-automation Automation Runtime
Published: 2022-05-13
Last modified: 2026-06-17

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.

Frequently asked questions

What is CVE-2021-22275?: 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.
How severe is CVE-2021-22275?: CVE-2021-22275 has a CVSS 3.x base score of 8.6, rated high severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is none, integrity none, and availability high.
Is CVE-2021-22275 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (55th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2021-22275?: CVE-2021-22275 affects Br-automation Automation Runtime. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2021-22275?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its high severity, prioritise patching exposed systems.
When was CVE-2021-22275 published?: CVE-2021-22275 was published on 2022-05-13 and last updated on 2026-06-17.

References

https://www.br-automation.com/downloads_br_productcatalogue/assets/1625405588264-en-original-1.0.pdf

Affected products (1)

cpe:2.3:a:br-automation:automation_runtime:*:*:*:*:*:*:*:*

More vulnerabilities in Br-automation Automation Runtime

CVE-2024-0323 — Critical (CVSS 9.8): The FTP server used on the B&R Automation Runtime supports unsecure encryption mechanisms, such as SSLv3, TLSv1.0 and…
CVE-2019-19108 — Critical (CVSS 9.4): An authentication weakness in the SNMP service in B&R Automation Runtime versions 2.96, 3.00, 3.01, 3.06 to 3.10, 4.00…
CVE-2023-3242 — High (CVSS 8.6): Improper initialization implementation in Portmapper used in B&R Industrial Automation Automation Runtime <G4.93 allows…
CVE-2024-5800 — High (CVSS 7.5): Diffie-Hellman groups with insufficient strength are used in the SSL/TLS stack of B&R Automation Runtime versions…
CVE-2023-6028 — Medium (CVSS 6.1): A reflected cross-site scripting (XSS) vulnerability exists in the SVG version of System Diagnostics Manager of B&R…
CVE-2022-4286 — Medium (CVSS 6.1): A reflected cross-site scripting (XSS) vulnerability exists in System Diagnostics Manager of B&R Automation Runtime…

All CVEs affecting Br-automation Automation Runtime →

Other CWE-120 (Classic Buffer Overflow) vulnerabilities

CVE-2025-48611 — Critical (CVSS 10.0): In DeviceId of DeviceId.java, there is a possible desync in persistence due to a missing bounds check. This could lead…
CVE-2026-24823 — Critical (CVSS 10.0): Out-of-bounds Write, Buffer Copy without Checking Size of Input ('Classic Buffer Overflow') vulnerability in FASTSHIFT…
CVE-2026-24810 — Critical (CVSS 10.0): Buffer Copy without Checking Size of Input ('Classic Buffer Overflow') vulnerability in rethinkdb (src/cjson modules).…
CVE-2026-24800 — Critical (CVSS 10.0): Out-of-bounds Write, Buffer Copy without Checking Size of Input ('Classic Buffer Overflow') vulnerability in tildearrow…
CVE-2025-9962 — Critical (CVSS 10.0): A buffer overflow vulnerability in Novakon P series allows attackers to gain root permission without prior…
CVE-2010-10016 — Critical (CVSS 10.0): BS.Player version 2.57 (build 1051) contains a vulnerability in its playlist import functionality. When processing .m3u…

Browse all CWE-120 (Classic Buffer Overflow) vulnerabilities →