What is the CVSS score of CVE-2026-27512?

CVE-2026-27512 has a CVSS 3.1 base score of 6.1 (Medium). CVSS vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N. EPSS exploitation probability: 0.0%.

Which versions of F3 Firmware are affected by CVE-2026-27512?

Organizations using Shenzhen Tenda F3 Wireless Router firmware V12.01.01.55_multi should be aware of moderate risk from CVE-2026-27512, a cross-site scripting vulnerability rated CVSS 6.1.

How to fix or mitigate CVE-2026-27512?

Within 30 days: Identify affected systems and apply vendor patches as part of regular patch cycle. Verify Content-Security-Policy and output encoding.

F3 Firmware CVE-2026-27512

MEDIUM

Cross-site Scripting (XSS) (CWE-79)

2026-02-23 disclosure@vulncheck.com

XSS Tenda F3 Firmware

6.1

CVSS 3.1 · NVD

Severity by source

NVD PRIMARY

6.1 MEDIUM

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

Primary rating from NVD · only source for this CVE.

CVSS VectorNVD

Attack Vector

Network

Attack Complexity

Low

Privileges Required

None

User Interaction

Required

Scope

Changed

Confidentiality

Low

Integrity

Low

Availability

None

Lifecycle Timeline

Analysis Generated

Mar 12, 2026 - 21:55 vuln.today

CVE Published

Feb 23, 2026 - 17:23 nvd

MEDIUM 6.1

DescriptionCVE.org

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.

AnalysisAI

Tenda F3 Wireless Router firmware V12.01.01.55_multi is vulnerable to reflected cross-site scripting (XSS) in its administrative interface due to missing MIME-sniffing protections and insufficient input validation. An unauthenticated attacker can inject malicious scripts that execute in the context of the admin interface when a user visits a crafted link, potentially leading to administrative account compromise. No patch is currently available for this vulnerability.

Technical ContextAI

Classified as CWE-79 (Cross-site Scripting (XSS)). Affects the administrative component of 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.

RemediationAI

Monitor vendor advisories for a patch. Implement output encoding and Content Security Policy headers. Restrict network access to the affected service where possible.