CVE-2019-3943 Path traversal in RouterOS
Authenticated attackers can traverse directories to read and write files outside the sandbox via HTTP or Winbox interfaces.
- 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-2019-3943?
CVE-2019-3943 is a high-severity path traversal vulnerability in Mikrotik Routeros, published on 10 Apr 2019. Any signed-in user can exploit it over the network, with no action from the victim.
Official description
MikroTik RouterOS versions Stable 6.43.12 and below, Long-term 6.42.12 and below, and Testing 6.44beta75 and below are vulnerable to an authenticated, remote directory traversal via the HTTP or Winbox interfaces. An authenticated, remote attack can use this vulnerability to read and write files outside of the sandbox directory (/rw/disk).
Which versions are affected by CVE-2019-3943?
It affects 1 product.
Products include Mikrotik Routeros.
How do I fix CVE-2019-3943?
No fix has been published for CVE-2019-3943 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-2019-3943 being exploited?
There is no known exploitation of CVE-2019-3943 in the wild and no public exploit code.
Other vulnerabilities in Mikrotik Routeros
- CVE-2018-7445 MikroTik RouterOS Stack-Based Buffer Overflow
- CVE-2026-86060 MikroTik RouterOS Improper Neutralization of Argument Delimiters in a Command
- CVE-2018-14847 MikroTik Router OS Directory Traversal
- CVE-2026-67277 MikroTik RouterOS Missing Authentication for Critical Function
- CVE-2026-67279 Mikrotik RouterOS Improper Enforcement of Behavioral Workflow
Sources
Also known as GHSA-5qg2-wqx5-pq26.