RCE in Shenzhen Tenda Technology G300-F
CVE-2026-25857
Tenda G300-F router firmware version 16.01.14.2 and prior contain an OS command injection vulnerability in the WAN diagnostic functionality (formSetWanDiag). The implementation constructs a shell command that invokes curl and incorporates attacker-controlled input into the command line without adequate neutralization. As a result, a remote attacker with access to the affected management interface can inject additional shell syntax and execute arbitrary commands on the device with the privileges of the management process.
Vulnerability class: Command Injection (OS Command Injection)
Published · last modified .
CVSS v3 metric
CVSS v3 base score 8.8 (High). Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H.
EPSS exploit prediction
EPSS: 0.029 (86.5th percentile), scored .
Low probability of exploitation in the next 30 days, but still tracked. 86th percentile — 86.5% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.028 · newest: 0.029 · change: +0.001
Affected products
- Shenzhen Tenda Technology G300-F — versions 0
- Tenda G300-F — versions 1.0
- Tenda G300-F Firmware
Weakness classification (CWE)
Public proof-of-concept exploits
References
- blog.evan.lat/blog/cve-2026-25857/ (Exploit, technical-description, Third Party Advisory, exploit)
- www.tendacn.com/material/show/736333682028613 (Product, product)
- www.vulncheck.com/advisories/tenda-g300-f-command-injection-via-formsetwandiag (VDB Entry, Third Party Advisory, third-party-advisory)
Frequently asked questions
- What is CVE-2026-25857?
- CVE-2026-25857 is a high-severity vulnerability in Shenzhen Tenda Technology G300-F, classified under OS Command Injection. CVSS score: 8.8/10. Published 2026-02-07.
- How severe is CVE-2026-25857?
- High severity. CVSS v3 base score is 8.8 out of 10.
- Is CVE-2026-25857 known to be exploited?
- 1 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.