CVE-2026-1791 Arbitrary File Upload Vulnerability in Operation and Maintenance Security Gateway
Attackers can upload malicious web shells to the Hillstone Operation and Maintenance Security Gateway, leading to remote code execution.
- Exploited in the wild
- Not known
- Login needed
- An administrator
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- None listed
What is CVE-2026-1791?
CVE-2026-1791 is a low-severity vulnerability in Hillstone Networks Operation and Maintenance Security Gateway, published on 4 Feb 2026. An attacker needs administrator access to exploit it, with no action from the victim.
Official description
Unrestricted Upload of File with Dangerous Type vulnerability in Hillstone Networks Operation and Maintenance Security Gateway on Linux allows Upload a Web Shell to a Web Server.This issue affects Operation and Maintenance Security Gateway: V5.5ST00001B113.
Weakness: CWE-434
Which versions are affected by CVE-2026-1791?
How do I fix CVE-2026-1791?
No fix has been published for CVE-2026-1791 yet. Limit exposure of the affected software until one is available.
Is CVE-2026-1791 being exploited?
There is no known exploitation of CVE-2026-1791 in the wild and no public exploit code.
Sources
Also known as GHSA-w3f6-336f-pxmh.