Arbitrary file access via arp-preinit symlink replacement
Published Jul 8, 2025 · Updated Jul 8, 2025
Link following in the arp-preinit script in Phoenix Contact PLCnext firmware before 2025.0.2 allows remote authenticated users to access any file. The script reads, writes, or executes a critical path after a low-privileged user replaces its target with a symbolic link, resolving the operation to an unintended file. Existing low-privileged file access is required; successful exploitation exposes or alters arbitrary device files and can execute their contents.
Summary
What happened
Link following in the arp-preinit script in Phoenix Contact PLCnext firmware before 2025.0.2 allows remote authenticated users to access any file. The script reads, writes, or executes a critical path after a low-privileged user replaces its target with a symbolic link, resolving the operation to an unintended file. Existing low-privileged file access is required; successful exploitation exposes or alters arbitrary device files and can execute their contents.
The record
- CVE
- CVE-2025-41667
- Published
- Jul 8, 2025
- Updated
- Jul 8, 2025
- Vendor
- Phoenix Contact
- Product
- BPC 9102S
- Classifications
- CWE-59, CAPEC-35, CAPEC-17, CAPEC-76, CAPEC-132, T0866
- Attack vector
- network
- Privileges
- authenticated
Timeline
How it unfolded
- Jul 8, 2025CVE publishedPublication date reported by the CVE source.
- Jul 8, 2025Record updatedLatest update available in the CVE record.
Exploitability
Present is not the same as exploitable
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Is a vulnerable build present?
Compare these published version ranges with your installed build and any vendor patches.
- Affected versionversion=0 <2025.0.2
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.
Weakness, pattern, technique
Public exploit references
No public exploit references are available in this record.
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Technologies
Your stack
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Your stack
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