Local privilege escalation via user-writable search locations
Published May 27, 2026 · Updated May 27, 2026
Uncontrolled search path handling in Phoenix Contact PLCnext firmware before 2026.0.3 allows local users to gain elevated privileges. An unnamed privileged system service processes configuration or application-related files from filesystem locations writable by low-privileged users. Exploitation requires local low-privilege access and permits influence over the elevated service; Phoenix Contact has not disclosed the service, file names, or exact search sequence.
Summary
What happened
Uncontrolled search path handling in Phoenix Contact PLCnext firmware before 2026.0.3 allows local users to gain elevated privileges. An unnamed privileged system service processes configuration or application-related files from filesystem locations writable by low-privileged users. Exploitation requires local low-privilege access and permits influence over the elevated service; Phoenix Contact has not disclosed the service, file names, or exact search sequence.
The record
- CVE
- CVE-2025-41670
- Published
- May 27, 2026
- Updated
- May 27, 2026
- Vendor
- Phoenix Contact
- Product
- BPC 9102S
- Classifications
- CWE-427, T1574
- Attack vector
- local
- Privileges
- authenticated
Timeline
How it unfolded
- May 27, 2026CVE publishedPublication date reported by the CVE source.
- May 27, 2026Record updatedLatest update available in the CVE record.
Exploitability
Present is not the same as exploitable
Compare your product and version with the public record. A matching version still requires validation against your environment.
Is a vulnerable build present?
Compare these published version ranges with your installed build and any vendor patches.
- Affected versionversion=0.0.0 <2026.0.3
What conditions does exploitation require?
What is affected?
Published CVSS scores
CVSS describes severity. EPSS estimates exploitation probability.
Attacks
What attackers are doing with it
Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.
Public exploit references
No public exploit references are available in this record.
Labels summarize the accepted research assessment. They do not indicate a test against your environment.
Technologies
Your stack
See the directory against your own environment.
Your stack
Check the software in your environment
Book a demo to see how Hinoki identifies affected software and validates exploitability in your environment.
Book a demo