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F3 Firmware CVE-2026-27511

MEDIUM
Improper Restriction of Rendered UI Layers or Frames (CWE-1021)
2026-02-23 disclosure@vulncheck.com
XSS F3 Firmware
4.3
CVSS 3.1 · NVD
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Severity by source

NVD PRIMARY
4.3 MEDIUM
AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:L/A:N

Primary rating from NVD · only source for this CVE.

CVSS VectorNVD

CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:L/A:N
Attack Vector
Network
Attack Complexity
Low
Privileges Required
None
User Interaction
Required
Scope
Unchanged
Confidentiality
None
Integrity
Low
Availability
None

Lifecycle Timeline

3
Analysis Generated
Mar 12, 2026 - 21:55 vuln.today
PoC Detected
Feb 23, 2026 - 20:16 vuln.today
Public exploit code
CVE Published
Feb 23, 2026 - 17:23 nvd
MEDIUM 4.3

DescriptionCVE.org

Shenzhen Tenda F3 Wireless Router firmware V12.01.01.55_multi contains a clickjacking vulnerability in the web-based administrative interface. The interface does not set the X-Frame-Options header, allowing attacker-controlled sites to embed administrative pages in an iframe and trick an authenticated administrator into unintended interactions that may result in unauthorized configuration changes.

AnalysisAI

Tenda F3 Wireless Router firmware V12.01.01.55_multi lacks clickjacking protections in its web administrative interface, enabling attackers to embed configuration pages in iframes and manipulate authenticated administrators into making unauthorized changes. Public exploit code exists for this vulnerability, affecting administrators who access the router's management interface. …

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Vulnerability AssessmentAI

Risk Assessment CVSS 4.3 (MEDIUM). … Full risk analysis with EPSS, KEV, and SSVC signal comparison available after sign-in.
Exploit Scenario An attacker without authentication could exploit this vulnerability to unauthorized configuration changes.
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Within 30 days: Identify affected systems and apply vendor patches as part of regular patch cycle. …

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CVE-2026-27511 vulnerability details – vuln.today
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