Local code execution via log filename overflow
Published Mar 22, 2026 · Updated Mar 22, 2026
Stack-based buffer overflow in LabF Axessh 4.2 allows local users to execute arbitrary code through an oversized log filename. The logging settings copy an excessively long log file name into a fixed-size stack buffer, allowing data beyond offset 214 to overwrite the instruction pointer. Access to the Windows client UI is required to enable session logging and submit the crafted value; successful exploitation runs shellcode with the application's system privileges.
Summary
What happened
Stack-based buffer overflow in LabF Axessh 4.2 allows local users to execute arbitrary code through an oversized log filename. The logging settings copy an excessively long log file name into a fixed-size stack buffer, allowing data beyond offset 214 to overwrite the instruction pointer. Access to the Windows client UI is required to enable session logging and submit the crafted value; successful exploitation runs shellcode with the application's system privileges.
The record
- CVE
- CVE-2019-25607
- Published
- Mar 22, 2026
- Updated
- Mar 22, 2026
- Vendor
- LabF
- Product
- Axessh
- Classifications
- CWE-787, T1203
- Attack vector
- local
- Privileges
- authenticated
Timeline
How it unfolded
- Mar 22, 2026CVE publishedPublication date reported by the CVE source.
- Mar 22, 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=4.2
What conditions does exploitation require?
What is affected?
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
- Axessh 4.2 Log file name Local Stack-based Buffer Overflowfunctional · demonstrated
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