Low severity · published Feb 4, 2026
CVE-2026-1791
Arbitrary File Upload Vulnerability in Operation and Maintenance Security Gateway
2.7
CVSS
0.4%
EPSS
No
On KEV
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.
CVSS vector
CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:N/I:N/A:L
Attack vector
Network
Complexity
Low
Privileges
High
User interaction
None
Confidentiality
None
Integrity
None
Availability
Low
Scope
Unchanged
Exploitation
Is it being used?
Exploit prediction (EPSS)0.4% · higher than 29% of CVEs
Exploited in the wildNo evidence yet
CISA KEVNot listed
Ransomware campaign useNot known
Affected products
Which versions
OA
Operation and Maintenance Security Gateway · Hillstone Networks
V5.5ST00001B113 · source: vendor
Affected product
OA
Operation and Maintenance Security Gateway
Hillstone Networks