CVE-2021-22281Zip Slip Vulnerability in B&R Automation Studio Project Import
- 6.3MediumCVSS base score
- 0.38%Exploitation in 30 daysEPSS · top 68% of all CVEs
- NoKnown exploitednot in CISA's KEV catalog
- NonePublic exploitsnone known yet
Description
: Relative Path Traversal vulnerability in B&R Industrial Automation Automation Studio allows Relative Path Traversal.This issue affects Automation Studio: from 4.0 through 4.12.
Timeline
ID reserved
By ABB
- 3 years later
· 3 years later
Published
- 7 months later
· 7 months later
Record updated
Changes after publication (a new score, a public exploit, EPSS crossing 1, 10 or 50 %, leaving KEV) are kept since November 2026; earlier ones are not known.
Scores
| Scored by | CVSS | Score | Vector |
|---|---|---|---|
| ABBCNA (assigner) | 3.1 | Medium6.3 | CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:C/C:N/I:H/A:N |
| NVDNVD · Modified | 3.1 | High7.5 | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N |
- EPSS (exploitation in 30 days)
- 0.38% · top 68% of all CVEs (15 Nov 2026)
- CISA SSVC
- Exploitation: none · Automatable: no · Technical impact: partial
The list uses the assigner's score when there is one, then CISA's, then NVD's: Medium 6.3.
Affected products
B&R Industrial Automation · Automation Studio
- affected 4.0 – ≤ 4.12
What to do
Workaround: B&R recommends the following specific workarounds and mitigations: Open only B&R Automation Studio project files from trusted source. Use encrypted export of B&R Automation Studio project files, thus only allowing access to legitimate users. Protect locations where B&R Automation Studio projects are stored from unauthorized access. This includes PLCs, when using the feature to back up project source files on target. Do not run B&R Automation Studio in elevated mode. Make sure, that Windows User Access Control (UAC) is enabled. Verify integrity of B&R Automation Studio project files, which are exchanged via potentially insecure channels In general, B&R recommends implementing the Cyber Security guidelines
References
Sources
The same CVE in the primary databases and aggregators, to check against.
- CVE.org record (opens in a new tab)
- CVE List JSON (GitHub) (opens in a new tab)
- NVD (opens in a new tab)
- FIRST EPSS (opens in a new tab)
- EUVD EUVD-2021-9427 (opens in a new tab)
- OSV.dev (opens in a new tab)
- GitHub Advisories (opens in a new tab)
- CIRCL Vulnerability-Lookup (opens in a new tab)
Badge for a README or a ticket
[](https://cveledger.app/cve/CVE-2021-22281)Record last updated .