CVE-2026-6901
Untrusted search path in APROL may allow loading malicious DLLs and code execution.
Is CVE-2026-6901 being exploited?
Not confirmed. CVE-2026-6901 does not appear in CISA's Known Exploited Vulnerabilities catalog, which records only exploitation that has been observed and reported publicly. That is evidence of absence of a report, not evidence the flaw is unattacked. EPSS currently estimates a 0.16% probability of exploitation in the next 30 days.
How severe is CVE-2026-6901?
CVE-2026-6901 is rated High with a CVSS score of 8.4. Severity describes how bad exploitation would be, not how likely it is: pair it with exploitation evidence before deciding what to patch first.
Is there a patch for CVE-2026-6901?
Yes. A fix has been recorded for CVE-2026-6901. The vendor advisory is the authority on the exact fixed version — apply it from there rather than from a summary.
What does CVE-2026-6901 affect?
CVE-2026-6901 affects APROL Industrial Automation software (B&R) before R 4.4-01P5. Confirm the exact affected versions against the vendor advisory before deciding you are exposed.
What should I do about CVE-2026-6901?
Patch to R 4.4-01P5+; verify secure DLL search paths; test before prod.
Exploitation status reflects CISA's KEV catalog as we last synced it. Check the catalog directly.
Path confusion could let attacker load untrusted libraries, enabling arbitrary code execution with APROL privileges.
Patch when possible
- affected< R 4.4-01P5
As published in the CVE Program record. A version outside these ranges is not a statement that it is unaffected — vendors sometimes understate a range, and distribution-backported builds carry upstream numbers that do not reflect what was patched into them.