CVE-2025-0566: A vulnerability classified as critical has been found in Tenda AC15 15.13.07.13. This affects the function formSetDevNetName of the file /goform/SetDevNetName…

PriorityP270high8.8CVSS 3.1

AVNACLPRLUINSUCHIHAH

EPSS

8.65%

94.5th percentile

A vulnerability classified as critical has been found in Tenda AC15 15.13.07.13. This affects the function formSetDevNetName of the file /goform/SetDevNetName. The manipulation of the argument mac leads to stack-based buffer overflow. It is possible to initiate the attack remotely. The exploit has been disclosed to the public and may be used.

Affected

2 ranges

Vendor	Product	Version range	Fixed in
tenda	ac15	—	—
tenda	ac15_firmware	—	—

Detection & IOCsextracted from sources · hover to see the quote

path/goform/SetDevNetName

urlhttps://github.com/alc9700jmo/CVE/issues/18

snort

alert http any any -> $HOME_NET any (msg:"ET WEB_SPECIFIC_APPS Tenda SetDevNetName mac Parameter Buffer Overflow Attempt (CVE-2025-0566)"; flow:established,to_server; http.method; content:"POST"; http.uri; bsize:21; content:"/goform/SetDevNetName"; fast_pattern; http.request_body; content:"mac|3d|"; pcre:"/^[^&]{100,}(?:&|$)/R"; reference:url,github.com/alc9700jmo/CVE/issues/18; reference:cve,2025-0566; classtype:web-application-attack; sid:2066305; rev:1; metadata:affected_product Tenda, attack_target Networking_Equipment, tls_state plaintext, created_at 2025_12_12, cve CVE_2025_0566, deployment Perimeter, deployment Internal, performance_impact Low, confidence High, signature_severity Major, tag Exploit, tag Description_Generated_By_Proofpoint_Nexus, updated_at 2025_12_12, mitre_tactic_id TA0001, mitre_tactic_name Initial_Access, mitre_technique_id T1190, mitre_technique_name Exploit_Public_Facing_Application; target:dest_ip;)

→Exploit targets HTTP POST requests to the exact URI /goform/SetDevNetName (URI length is exactly 21 bytes); match on POST method + this URI path.
→The overflow is triggered via the 'mac' parameter in the POST body; look for 'mac=' followed by a value of 100 or more characters (not containing '&') as the overflow payload indicator.
→Attack is plaintext HTTP (not TLS); deploy detection at the network perimeter and internally on traffic destined to networking equipment.
→The vulnerable function is formSetDevNetName in the file /goform/SetDevNetName on Tenda AC15 firmware 15.13.07.13; stack-based buffer overflow via the 'mac' argument. ↗

·The Snort/Suricata rule (ET sid:2066305) uses a PCRE threshold of 100+ characters for the mac parameter value; tune this threshold if the environment sees legitimate long mac values, though standard MAC addresses are far shorter.
·Detection is scoped to plaintext HTTP only; if the Tenda management interface is ever proxied behind TLS, the rule will not fire.

CVSS provenance

nvdv3.18.8HIGHCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

nvdv4.08.7HIGHCVSS: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: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

nvdv2.09.0CRITICALAV:N/AC:L/Au:S/C:C/I:C/A:C

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