EUVD-2026-35077
GHSA-3fr6-p7vj-gvw2
CVSS VectorNVD
CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:P/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
Lifecycle Timeline
5DescriptionNVD
A vulnerability was detected in Tenda W20E 15.11.0.6. This vulnerability affects the function formSetPortMirror of the file /goform/setPortMirror. Performing a manipulation of the argument portMirrorMirroredPorts results in stack-based buffer overflow. The attack can be initiated remotely. The exploit is now public and may be used.
AnalysisAI
Stack-based buffer overflow in the Tenda W20E router (firmware 15.11.0.6) allows remote authenticated attackers to corrupt memory via the portMirrorMirroredPorts parameter handled by formSetPortMirror in /goform/setPortMirror. Publicly available exploit code exists, raising the practical risk for exposed management interfaces, though no CISA KEV listing or EPSS data is provided to confirm widespread exploitation. …
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Attack ChainAIDerived
Hypothetical attack flow derived from CVE metadata
Vulnerability AssessmentAI
| Exploitation | Attacker must reach the router's HTTP management interface (typically TCP/80 or /443 on the LAN side, and on the WAN side only if remote management is enabled) and must hold valid credentials of at least low privilege per CVSS PR:L - exploitation is not achievable fully unauthenticated. … Additional conditions and limiting factors are described in the full assessment. |
| Risk Assessment | CVSS 4.0 scores this 7.4 (High) with vector AV:N/AC:L/AT:N/PR:L/UI:N - network-reachable, low complexity, but requiring some level of authentication (PR:L) and no user interaction, with high VC/VI/VA impact and unchanged subsequent system scope. … Full risk analysis with EPSS, KEV, and SSVC signal comparison available after sign-in. |
| Exploit Scenario | An attacker who has obtained valid (potentially low-privilege or default) credentials to the Tenda W20E web interface sends a crafted HTTP POST to /goform/setPortMirror with an oversized portMirrorMirroredPorts argument. The stack buffer overflow corrupts the saved return address in formSetPortMirror, redirecting execution to attacker-supplied shellcode and yielding command execution as root on the router, enabling traffic interception, DNS hijacking, or recruitment into an IoT botnet. … |
| Remediation | No vendor-released patch identified at time of analysis - Tenda has not published a fixed firmware version in the available references. … Detailed patch versions, workarounds, and compensating controls in full report. |
Recommended ActionAI
24 hours: Identify and inventory all Tenda W20E routers (firmware 15.11.0.6) in production; immediately restrict management interface access (/goform/setPortMirror) to authorized administrators only via isolated administrative VLANs. …
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