CVE-2026-27512CWE-116CWE-79

Tenda F3 Reflected Script Execution via Missing nosniff Header

Medium · published February 23, 2026

CVSS v4.0
5.1
EPSS
0%
Percentile
30.2
In the wild
Unconfirmed
What it is

Shenzhen Tenda F3 Wireless Router firmware V12.01.01.55_multi contains a content-type confusion vulnerability in the administrative interface. Responses omit the X-Content-Type-Options: nosniff header and include attacker-influenced content that can be reflected into the response body. Under affected browser behaviors, MIME sniffing may cause the response to be interpreted as active HTML, enabling script execution in the context of the administrative interface.

The record
Technical detail
CVSS v4.0
5.1 · MEDIUM
Vector
CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:A/VC:N/VI:N/VA:N/SC:L/SI:L/SA:N
EPSS
0.00374 · 30.2th percentile
Weaknesses
CWE-116 · Improper Encoding or Escaping of Output; CWE-79 · Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')
Published
2026-02-23T16:26Z
EPSS history
Timeline
  • 23 FEB 16:26Z
    Tenda F3 Reflected Script Execution via Missing nosniff Header
    cvelistv5