CVE-2021-22275

HIGHNVD 8.68.6—Trending — 3 sources updated this week

8.6

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.

CVSS v3: 8.6
EG Score: 8.6(medium)
EPSS: 63.3%
KEV: Not listed

Published

May 13, 2022

Last Modified

November 21, 2024

References (2)

cybersecurity@chhttps://www.br-automation.com/downloads_br_productcatalogue/assets/1625405588264-en-original-1.0.pdf
af854a3a-2127-422b-91ae-364da2661108https://www.br-automation.com/downloads_br_productcatalogue/assets/1625405588264-en-original-1.0.pdf

Weakness Classification(1)

MITRE Common Weakness Enumeration — the root-cause categories this CVE belongs to.

CWE-120Buffer Copy without Checking Size (Classic Buffer Overflow)

Data Freshness Timeline

(refreshed 10× in last 7d / 10× in last 30d)

Every time one of our enrichment pipelines (NVD, MITRE cvelistV5, EPSS, CISA KEV, GHSA, OSV, vendor advisories) ran against this CVE. Most recent first.

2026-05-28 13:43 UTCepss_batch
2026-05-28 13:43 UTCepss_batch
2026-05-27 13:39 UTCepss_batch
2026-05-26 13:42 UTCepss_batch
2026-05-26 13:42 UTCepss_batch
2026-05-26 07:17 UTCepss_batch
2026-05-26 07:17 UTCepss_batch
2026-05-25 22:10 UTCEG score recompute
2026-05-25 22:10 UTCGHSA enrichment
2026-05-24 16:49 UTCepss_batch

Frequently asked(5)

What is CVE-2021-22275?

CVE-2021-22275 is a high vulnerability published on May 13, 2022. 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.

When was CVE-2021-22275 disclosed?

CVE-2021-22275 was first published in the National Vulnerability Database on May 13, 2022, with the most recent update on November 21, 2024. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.

Is CVE-2021-22275 actively exploited?

CVE-2021-22275 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 63.3% percentile likelihood of exploitation in the next 30 days — higher percentiles indicate greater predicted risk.

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

CVE-2021-22275 has a CVSS v3 base score of 8.6 (NVD).

How do I remediate CVE-2021-22275?

Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2021-22275, EchelonGraph cross-links them in the Vendor Advisories panel below — those typically contain the canonical remediation steps, fixed version numbers, and any vendor-specific mitigations.

Dependency Blast Radius

See which npm, PyPI, Go, and Maven packages are affected by CVE-2021-22275

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Is Your Infrastructure Affected by CVE-2021-22275?

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CVE-2021-22275

📅 Published

🔄 Last Modified

🔗 References (2)