UNIX symbolic link following in Century Systems products - CVE-2025-30485

Vulnerability identifier: #VU106237

CSH Severity: Low

CVSS v4: 7 [CVSS:4.0/AV:P/AC:L/AT:N/PR:H/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N]

CVE-ID: CVE-2025-30485

CWE-ID: CWE-61

Exploitation vector: Local access

Exploit availability: No public exploit available

The vulnerability allows a local user to escalate privileges on the system.

The vulnerability exists due to a symlink following issue. An administrator with physical access can create a specially crafted symbolic link to a critical file on the system and obtain or destroy internal files.

FutureNet NXR-230/C
FutureNet NXR-G120
FutureNet NXR-G180/L-CA
FutureNet NXR-G110
FutureNet NXR-G240
FutureNet NXR-G100
FutureNet NXR-G260
FutureNet NXR-G540
FutureNet NXR-G060
FutureNet NXR-160/LW
FutureNet NXR-350/C
FutureNet NXR-G050
FutureNet NXR-530
FutureNet VXR-x64
FutureNet NXR-610X
FutureNet VXR-x86
FutureNet NXR-650
FutureNet NXR-1300
FutureNet NXR-1420

Install updates from vendor's website.

FutureNet NXR-230/C - update to 5.30.14
FutureNet NXR-G120 - update to 21.15.2C2
FutureNet NXR-G180/L-CA - update to 21.7.34
FutureNet NXR-G110 - update to 21.15.11
FutureNet NXR-G240 - update to 9.12.18
FutureNet NXR-G100 - update to 6.23.12
FutureNet NXR-G260 - update to 9.12.18
FutureNet NXR-G540 - update to 21.17.1
FutureNet NXR-G060 - update to 21.15.6C3
FutureNet NXR-160/LW - update to 21.8.5
FutureNet NXR-350/C - update to 5.30.9D
FutureNet NXR-G050 - update to 21.12.12
FutureNet NXR-530 - update to 21.11.16
FutureNet VXR-x64 - update to 21.7.34
FutureNet NXR-610X - update to 21.14.11F
FutureNet VXR-x86 - update to 10.1.6
FutureNet NXR-650 - update to 21.16.6
FutureNet NXR-1420 - update to 31.0.2

• https://jvn.jp/en/vu/JVNVU92821536/index.html
• https://www.centurysys.co.jp/backnumber/common/jvnvu92821536.html

• UNIX symbolic link following in FutureNet NXR series and VXR series routers