RCE in Totolink N600r
CVE-2025-9935
A vulnerability was determined in TOTOLINK N600R 4.3.0cu.7866_B20220506. This vulnerability affects the function sub_4159F8 of the file /web_cste/cgi-bin/cstecgi.cgi. Executing manipulation can lead to command injection. The attack can be…
EPSS: 0.021 (84.3th percentile) — read the EPSS interpretation.
CVSS v3 metric
CVSS v3 base score 7.3 (High). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:L.
Affected products
- Totolink N600r — versions 4.3.0cu.7866_B20220506
- Totolink N600r_firmware — versions 4.3.0cu.7866_b20220506
Weakness classification (CWE)
Public proof-of-concept exploits
References
- VDB-322337 | TOTOLINK N600R cstecgi.cgi sub_4159F8 command injection (technical-description, Third Party Advisory, VDB Entry, vdb-entry)
- VDB-322337 | CTI Indicators (IOB, IOC, TTP, IOA) (signature, Permissions Required, permissions-required, VDB Entry)
- Submit #643088 | Shenzhen Shengshi Zhongtang Technology Co., Ltd..(TOTOLINK) TOTOLINK N600R V4.3.0cu.7866_B20220506 Unauthorized Command Injection (Third Party Advisory, VDB Entry, third-party-advisory)
- cna@vuldb.com (Exploit, Third Party Advisory, exploit)
- cna@vuldb.com (Product, product)
Frequently asked questions
- What is CVE-2025-9935?
- CVE-2025-9935 is a high-severity vulnerability in Totolink N600r, classified under Improper Neutralization of Special Elements in Output Used by a Downstream Component (Injection). CVSS score: 7.3/10. Published 2025-09-04.
- How severe is CVE-2025-9935?
- High severity. CVSS v3 base score is 7.3 out of 10.
- Is CVE-2025-9935 known to be exploited?
- 1 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.