CVE-2021-22275

highpriority · track · 34EPSS 0.010 · 61 %ileDEEUUS
grimoire priorityP2 · Scheduled
Exploitable?
—
no known exploitation
Likely / severe?
0.96% (61st) EPSS
CVSS 7.8 · high
Is it mine?
4 products
Check your exposure
Who says so?
4 sources
cnnvd · enisa_euvd · auma_psirt · nvd

EPSS · scored 2026-10-23

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.

01

remediations

Vendor fix, mitigation, or workaround guidance, as published by each source.

A vendor fix is available.

  • FixedFirmware <v2.6 installed on SIMA² Master Stationauma_psirt

    The described vulnerabilities have been fixed in the product versions with software version V 2.6 or higher. SIMA² Master Stations with software versions < V 2.6 can be upgraded. AUMA recommends applying a product update at the earliest convenience

  • MitigationFirmware <v2.6 installed on SIMA² Master Stationauma_psirt

    AUMA recommends the following specific workarounds and mitigations: The access to the SIMA² should be restricted to legitimate network partners, using e.g. a sufficient firewall setup and robust network segmentation. In general, AUMA recommends implementing the Product Security Guideline for uses on Cybersecurity for the SIMA² Master Station.

02

cvss

Technical severity, 0–10. One row per scoring source.

8.6
010

base score 0–10 · higher = more severe · hover a vector to decode

v2.07.8highAV:N/AC:L/Au:N/C:N/I:N/A:Cprimary · NVD / NIST USexploitability 10 · impact 6.9
v3.18.6highCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:N/I:N/A:Hprimary · NVD / NIST USexploitability 3.9 · impact 4
v3.18.6highCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:N/I:N/A:Hsecondary · ENISA EU
v3.18.6highCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:N/I:N/A:Hsecondary · cybersecurity@ch.abb.comexploitability 3.9 · impact 4
v3.17.9highCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:N/I:N/A:H/E:Usecondary · CVSS-BT (t0sche)
v3.18.6highCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:N/I:N/A:Hsecondary · AUMA PSIRT
03

weaknesses

The CWE weakness classes this flaw belongs to.

CWE-120USprimaryCWE-120US
04

affected products (4)

Products and version ranges known to be affected.

05

advisories (1)

Vendor and ecosystem advisories describing this.

  • VDE-2022-024Auma: SIMA² Master Station Denial of Service Vulnerability on Automation Runtime Webserver2022-06-15csaf · auma_psirtDE

    Improper buffer restrictions in the webserver used in SIMA² Master Station software versions < V 2.6 may allow an unauthenticated network-based attacker to stop the cyclic program on the device and cause a denial of service.

06

also known as (3)

Other names and identifiers for this entity.

07

sources

Which sources assert this record, and when.

cnnvdenisa_euvdauma_psirtnvdNVDCVE.orgMITRE
published 2022-05-13modified 2026-06-17
09

references (4)

External citations — patches, advisories, analysis.

scry

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