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Vulnerability record · CVE-2026-27512 · published 23 February 2026

CVE-2026-27512: Tenda f3 firmware cross-site scripting vulnerability

Tenda · F3 Firmware

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.

5.1 CVSS 4.0 Medium EPSS 0.33% · top 76.8% CWE-79 · Cross-site scriptingCWE-116 · CWE-116
5.1CVSS 4.0 base score
0.33%EPSS exploitation probability, 30 days
NoNot in CISA KEV
1Affected product versions listed by NVD
2References
17 Jun 2026Last modified by NVD

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.

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/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:

Affected products

1 vulnerable configurations from NVD's CPE data, grouped by vendor and product.

References

LinkTags
https://www.tendacn.com/product/F3 Product
https://www.vulncheck.com/advisories/tenda-f3-reflected-script-execution-via-missing-nosniff-header Third Party Advisory

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Related vulnerabilities

Same products first, then exploited flaws of the same weakness class.

7.1CVE-2026-27514Tenda f3 firmware vulnerabilityShenzhen Tenda F3 Wireless Router firmware V12.01.01.55_multi contains a sensitive information exposure vulnerability in the configuration download f…EPSS 0.39%6.5CVE-2020-35391Tenda f3 firmware vulnerabilityTenda N300 F3 12.01.01.48 devices allow remote attackers to obtain sensitive information (possibly including an http_passwd line) via a direct reques…EPSS 35%5.6CVE-2025-57569Tenda f3 firmware classic buffer overflow vulnerabilityTenda F3 V12.01.01.48_multi and after is vulnerable to Buffer Overflow via the portList parameter in /goform/setNAT.EPSS 0.20%5.6CVE-2025-57570Tenda f3 firmware classic buffer overflow vulnerabilityTenda F3 V12.01.01.48_multi and after is vulnerable to Buffer Overflow via the QosList parameter in goform/setQoS.EPSS 0.20%5.6CVE-2025-57571Tenda f3 firmware classic buffer overflow vulnerabilityTenda F3 V12.01.01.48_multi and after is vulnerable to Buffer Overflow. via the macFilterList parameter in goform/setNAT.EPSS 0.20%5.6CVE-2025-57572Tenda f3 firmware classic buffer overflow vulnerabilityTenda F3 V12.01.01.48_multi and after is vulnerable to Buffer Overflow via the onlineList parameter in goform/setParentControl.EPSS 0.22%5.6CVE-2025-57573Tenda f3 firmware classic buffer overflow vulnerabilityTenda F3 V12.01.01.48_multi and after is vulnerable to Buffer Overflow via the wifiTimeClose parameter in goform/setWifi.EPSS 0.22%5.1CVE-2026-27511Tenda f3 firmware clickjacking vulnerabilityShenzhen Tenda F3 Wireless Router firmware V12.01.01.55_multi contains a clickjacking vulnerability in the web-based administrative interface. The in…EPSS 0.33%

Source: NIST National Vulnerability Database (record CVE-2026-27512), CISA KEV, FIRST EPSS (scores of 2026-09-27). This page is refreshed as NVD updates the record.