CVE-2026-27512
Tenda F3 Reflected Script Execution via Missing nosniff Header
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.
INFO
Published Date :
Feb. 23, 2026, 5:23 p.m.
Last Modified :
Feb. 23, 2026, 8:16 p.m.
Remotely Exploit :
Yes !
Source :
[email protected]
CVSS Scores
| Score | Version | Severity | Vector | Exploitability Score | Impact Score | Source |
|---|---|---|---|---|---|---|
| CVSS 3.1 | MEDIUM | 83251b91-4cc7-4094-a5c7-464a1b83ea10 | ||||
| CVSS 3.1 | MEDIUM | [email protected] | ||||
| CVSS 4.0 | MEDIUM | 83251b91-4cc7-4094-a5c7-464a1b83ea10 | ||||
| CVSS 4.0 | MEDIUM | [email protected] |
Solution
- Update the router firmware to the latest version.
- Configure the administrative interface to send security headers.
- Disable MIME sniffing in affected browsers.
- Validate and sanitize user inputs.
References to Advisories, Solutions, and Tools
Here, you will find a curated list of external links that provide in-depth
information, practical solutions, and valuable tools related to
CVE-2026-27512.
| URL | Resource |
|---|---|
| https://www.tendacn.com/product/F3 | Product |
| https://www.vulncheck.com/advisories/tenda-f3-reflected-script-execution-via-missing-nosniff-header | Third Party Advisory |
CWE - Common Weakness Enumeration
While CVE identifies
specific instances of vulnerabilities, CWE categorizes the common flaws or
weaknesses that can lead to vulnerabilities. CVE-2026-27512 is
associated with the following CWEs:
Common Attack Pattern Enumeration and Classification (CAPEC)
Common Attack Pattern Enumeration and Classification
(CAPEC)
stores attack patterns, which are descriptions of the common attributes and
approaches employed by adversaries to exploit the CVE-2026-27512
weaknesses.
We scan GitHub repositories to detect new proof-of-concept exploits. Following list is a collection of public exploits and proof-of-concepts, which have been published on GitHub (sorted by the most recently updated).
Results are limited to the first 15 repositories due to potential performance issues.
The following list is the news that have been mention
CVE-2026-27512 vulnerability anywhere in the article.
The following table lists the changes that have been made to the
CVE-2026-27512 vulnerability over time.
Vulnerability history details can be useful for understanding the evolution of a vulnerability, and for identifying the most recent changes that may impact the vulnerability's severity, exploitability, or other characteristics.
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Initial Analysis by [email protected]
Feb. 23, 2026
Action Type Old Value New Value Added CPE Configuration AND OR *cpe:2.3:o:tenda:f3_firmware:*:*:*:*:*:*:*:* versions up to (including) 12.01.01.55_multi OR cpe:2.3:h:tenda:f3:-:*:*:*:*:*:*:* Added Reference Type VulnCheck: https://www.tendacn.com/product/F3 Types: Product Added Reference Type VulnCheck: https://www.vulncheck.com/advisories/tenda-f3-reflected-script-execution-via-missing-nosniff-header Types: Third Party Advisory -
New CVE Received by [email protected]
Feb. 23, 2026
Action Type Old Value New Value Added 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. Added CVSS V4.0 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:X/V:X/RE:X/U:X Added CVSS V3.1 AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N Added CWE CWE-79 Added CWE CWE-116 Added Reference https://www.tendacn.com/product/F3 Added Reference https://www.vulncheck.com/advisories/tenda-f3-reflected-script-execution-via-missing-nosniff-header