VulnerabilityModified

CVE-2026-25656

A vulnerability has been identified in SINEC NMS (All versions < V4.0 SP3), User Management Component (UMC) (All versions < V2.15.2.1).

HIGH 8.5EPSS 0.25%

Does this matter?

High impact if exploited, but EPSS currently rates exploitation as unlikely (0.25%). Schedule it in the normal patch cycle and watch for a rise in EPSS or a public exploit.

Description

A vulnerability has been identified in SINEC NMS (All versions < V4.0 SP3), User Management Component (UMC) (All versions < V2.15.2.1). The affected application permits improper modification of a configuration file by a low-privileged user. This could allow an attacker to load malicious DLLs, potentially leading to arbitrary code execution with SYSTEM privileges.(ZDI-CAN-28108)

CVSS 4.0: 8.5 HIGHCVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/M
EPSS: 0.25% probability · 16th percentile
CISA KEV: Not listed
Weakness: CWE-427
Affected: siemens/sinec nms · siemens/user management component
Source: productcert@siemens.com

References

https://cert-portal.siemens.com/productcert/html/ssa-311973.htmlVendor Advisory

Source: NVD record, EPSS from FIRST.org, KEV from CISA. Refreshed daily.