CVE-2025-8938

TOTOLINK N350R Telnet Service formSysTel backdoor

A vulnerability was found in TOTOLINK N350R 1.2.3-B20130826. This issue affects the function formSysTel of the file /boafrm/formSysTel of the component Telnet Service. The manipulation of the argument TelEnabled leads to backdoor. The attack may be initiated remotely. The exploit has been disclosed to the public and may be used.

Affected

TOTOLINK · N350R

CVSS v4.0 VULDB

2.1 LOWCVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:L/VI:L/VA:L/SC:N/SI:N/SA:N/E:P/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X

CVSS v3.1 VULDB

6.3 MEDIUMCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:L

CVSS v2.0 VULDB

6.5 MEDIUMAV:N/AC:L/Au:S/C:P/I:P/A:P

EPSS

0.33% chance of exploitation in the next 30 days, 25th percentile

Published

2025-08-14

Updated

2025-08-15

Proof-of-concept exploits (1)

• rew1X/CVE/blob/main/TOTOLINK/formSysTel/formSysTel.md#poc

Security advisories

• https://vuldb.com/?id.319901
• https://vuldb.com/?submit.631837
• https://www.totolink.net

References

• CVE Record
• NVD entry

Related

• CVE-2025-8937
• CVE-2025-9779
• CVE-2025-9780
• CVE-2025-9781
• CVE-2025-9782
• CVE-2025-9783