cbcvebase.
CVE-2025-11549
published 2025-10-09

CVE-2025-11549: A vulnerability has been found in Tenda W12 3.0.0.6(3948). The affected element is the function wifiMacFilterSet of the file /goform/modules of the component…

PriorityP276critical9.8CVSS 3.1
AVNACLPRNUINSUCHIHAH
EPSS
7.89%
94.0th percentile
A vulnerability has been found in Tenda W12 3.0.0.6(3948). The affected element is the function wifiMacFilterSet of the file /goform/modules of the component HTTP Request Handler. The manipulation of the argument mac leads to stack-based buffer overflow. The attack is possible to be carried out remotely. The exploit has been disclosed to the public and may be used.

Affected

2 ranges
VendorProductVersion rangeFixed in
tendaw12——
tendaw12_firmware——

Detection & IOCsextracted from sources · hover to see the quote

url/goform/modules↗
urlhttps://github.com/z472421519/BinaryAudit/blob/main/PoC/BOF/Tenda_W12/cgiWifiMacFilterSet/cgiWifiMacFilterSet.md
snort
alert http any any -> $HOME_NET any (msg:"ET WEB_SPECIFIC_APPS Tenda wifiMacFilterSet mac Parameter Buffer Overflow Attempt (CVE-2025-11549)"; flow:established,to_server; http.method; content:"POST"; http.uri; bsize:15; content:"/goform/modules"; http.request_body; content:"|22|wifiMacFilterSet|22|"; fast_pattern; content:"|22|mac|22|"; pcre:"/^(?:\x3a(?:\x20\x22|\x22))?[^\x2c\x7d$]{100,}(?:\x2c|\x7d|$)/R"; reference:url,github.com/z472421519/BinaryAudit/blob/main/PoC/BOF/Tenda_W12/cgiWifiMacFilterSet/cgiWifiMacFilterSet.md; reference:cve,2025-11549; classtype:web-application-attack; sid:2065121; rev:1; metadata:affected_product Tenda, attack_target Networking_Equipment, tls_state plaintext, created_at 2025_10_09, cve CVE_2025_11549, deployment Perimeter, deployment Internal, performance_impact Low, confidence High, signature_severity Major, tag Exploit, tag Description_Generated_By_Proofpoint_Nexus, updated_at 2025_10_09, 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/modules with a fixed URI length of 15 bytes; match on both URI and body content.
  • →Request body must contain the JSON key 'wifiMacFilterSet' (hex-encoded quotes: |22|wifiMacFilterSet|22|) — use as a fast-pattern anchor.
  • →Request body must also contain the JSON key 'mac' (|22|mac|22|), followed by a value of 100 or more characters not containing comma or closing brace — this oversized value triggers the stack-based buffer overflow.
  • →Attack is carried over plaintext HTTP (not TLS); deploy detection at the network perimeter and internally.
  • →The vulnerability is in the wifiMacFilterSet function within /goform/modules of Tenda W12 firmware 3.0.0.6(3948); a public PoC exists and active exploitation should be assumed.
  • ·The Snort/Suricata rule uses a PCRE with a minimum match length of 100 characters for the mac parameter value. Tune this threshold carefully — legitimate MAC address values are short (17 chars), so any value ≥100 chars is anomalous and strongly indicative of exploitation.
  • ·The URI buffer size is fixed at exactly 15 bytes (/goform/modules = 15 chars); the bsize:15 sticky buffer constraint means the rule will only fire on exact-length URI matches, reducing false positives but requiring the sensor to inspect the full HTTP URI.

CVSS provenance

nvdv3.19.8CRITICALCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
nvdv4.07.4HIGHCVSS: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
nvdv2.09.0CRITICALAV:N/AC:L/Au:S/C:C/I:C/A:C
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