Content-Type Confusion Vulnerability in Tenda F3 Wireless Router
CVE-2026-27512

5.1MEDIUM

Key Information:

Vendor

Shenzhen Tenda Technology Co., Ltd.

Status
Tenda F3
Vendor
CVE Published:
23 February 2026

What is CVE-2026-27512?

The Tenda F3 Wireless Router firmware version V12.01.01.55_multi is susceptible to a content-type confusion vulnerability that arises from the administrative interface. This issue occurs due to the omission of the crucial X-Content-Type-Options: nosniff header, leading to potential risks where attacker-influenced content may be reflected in the response body. When combined with certain browser behaviors, this vulnerability could facilitate MIME sniffing, permitting the response to be misinterpreted as executable HTML. Such exploitation might allow unauthorized script execution, posing significant risks to the router's administrative controls.

Affected Version(s)

Tenda F3 0 <= 12.01.01.55_multi

References

https://www.tendacn.com/product/F3
product
https://www.vulncheck.com/advisories/tenda-f3-reflected-s...
third-party-advisory

CVSS V4

Score:
5.1
Severity:
MEDIUM
Confidentiality:
None
Integrity:
None
Availability:
None
Attack Vector:
Network
Attack Complexity:
Low
Attack Required:
None
Privileges Required:
Undefined
User Interaction:
Unknown

Timeline

  • Vulnerability published

  • Vulnerability Reserved

Credit

Kazuma Matsumoto, a security researcher at GMO Cybersecurity by IERAE, Inc.
.