PT-2026-21530 · Tenda · Tenda F3 Wireless Router

Kazuma Matsumoto · Published 2026-02-23 · Updated 2026-02-24 · CVE-2026-27512

Positive Technologies (AI Summary)

CVSS v3.1

6.1

Medium

Base vector

AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N

Name of the Vulnerable Software and Affected Versions Shenzhen Tenda F3 Wireless Router firmware version V12.01.01.55 multi

Description The administrative interface of the software lacks the X-Content-Type-Options: nosniff header in responses and includes attacker-influenced content that can be reflected in the response body. MIME sniffing may cause the response to be interpreted as active HTML, potentially allowing script execution within the administrative interface.

Recommendations At the moment, there is no information about a newer version that contains a fix for this vulnerability.

Improper Encoding or Escaping of Output

XSS

Weakness Enumeration

CWE-116

CWE-79

Related Identifiers

CVE-2026-27512

Affected Products

Tenda F3 Wireless Router

References · 6

• https://osv.dev/vulnerability/CVE-2026-27512 · Vendor Advisory
• https://nvd.nist.gov/vuln/detail/CVE-2026-27512 · Security Note
• https://twitter.com/CVEnew/status/2026265034779717678 · Twitter Post
• https://t.me/CVEtracker/45509 · Telegram Post
• https://vulncheck.com/advisories/tenda-f3-reflected-script-execution-via-missing-nosniff-header · Note
• https://tendacn.com/product/F3 · Note