CVE-2026-111854 Path traversal in 3 Series MDO
Remote attackers can read or modify arbitrary files on Tektronix 3 Series MDO devices via path traversal in the SCPI interface.
- Exploited in the wild
- Not known
- Login needed
- Any signed-in user
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- None listed
What is CVE-2026-111854?
CVE-2026-111854 is a high-severity path traversal vulnerability in Tektronix 3 Series MDO, published on 17 Oct 2026. Any signed-in user can exploit it over the network, with no action from the victim.
Official description
An issue was discovered on Tektronix 3 Series MDO devices before 1.21.1. A path traversal vulnerability in the SCPI FILESystem command interface allows remote attackers to read or modify arbitrary files on the device through insufficient validation of file paths supplied to filesystem access commands.
Weakness: CWE-22
Which versions are affected by CVE-2026-111854?
How do I fix CVE-2026-111854?
No fix has been published for CVE-2026-111854 yet. Limit exposure of the affected software until one is available.
Upgrade, and resolve every user-supplied path against an allowed base folder before opening it. More about Path traversal.
Is CVE-2026-111854 being exploited?
There is no known exploitation of CVE-2026-111854 in the wild and no public exploit code.
Sources
Also known as GHSA-wr4m-ffvp-986p.