What’s Vulnerable › Vulnerabilities

CVE-2026-27512: Tenda F3 Reflected Script Execution via Missing nosniff Header

• Severity: medium (CVSS 6.1 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 0.2% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2026-02-23 · updated 2026-06-17
• Weakness: CWE-79

Description

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.

Affected products

• Shenzhen Tenda Technology Co., Ltd. Tenda F3: through 12.01.01.55_multi

References

• https://www.tendacn.com/product/F3
• https://www.vulncheck.com/advisories/tenda-f3-reflected-script-execution-via-missing-nosniff-header

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