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CVE-2025-3346
published 2025-04-07

CVE-2025-3346: A vulnerability was found in Tenda AC7 15.03.06.44. It has been rated as critical. Affected by this issue is the function formSetPPTPServer of the file…

PriorityP269high8.8CVSS 3.1
AVNACLPRLUINSUCHIHAH
EPSS
5.48%
91.8th percentile
A vulnerability was found in Tenda AC7 15.03.06.44. It has been rated as critical. Affected by this issue is the function formSetPPTPServer of the file /goform/SetPptpServerCfg. The manipulation of the argument pptp_server_start_ip/pptp_server_end_ip leads to buffer overflow. The attack may be launched remotely. The exploit has been disclosed to the public and may be used.

Affected

2 ranges
VendorProductVersion rangeFixed in
tendaac7——
tendaac7_firmware——

Detection & IOCsextracted from sources · hover to see the quote

url/goform/SetPptpServerCfg↗
snort
alert http any any -> $HOME_NET any (msg:"ET WEB_SPECIFIC_APPS Tenda AC7 SetPptpServerCfg Buffer Overflow Attempt (CVE-2025-3346, CVE-2025-10803, CVE-2025-10815)"; flow:established,to_server; http.method; content:"POST"; http.uri; bsize:24; content:"/goform/SetPptpServerCfg"; fast_pattern; http.request_body; content:"startIp|3d|"; content:"endIp|3d|"; pcre:"/(?:start|end)Ip\x3d.{200}/P"; reference:url,github.com/CH13hh/tmp_store_cc/blob/main/AC7formSetPPTPServer/formSetPPTPServer.md; reference:cve,2025-3346; reference:cve,2025-10803; reference:cve,2025-10815; classtype:attempted-admin; sid:2061337; rev:1; metadata:affected_product Tenda, attack_target Networking_Equipment, tls_state plaintext, created_at 2025_04_07, cve CVE_2025_3346, deployment Perimeter, deployment Internal, performance_impact Low, confidence High, signature_severity Major, tag Exploit, updated_at 2025_04_07, mitre_tactic_id TA0001, mitre_tactic_name Initial_Access, mitre_technique_id T1190, mitre_technique_name Exploit_Public_Facing_Application; target:dest_ip;)
  • →Match HTTP POST requests to the exact URI /goform/SetPptpServerCfg (URI length exactly 24 bytes) as the primary fast-pattern trigger. ↗
  • →Inspect the HTTP request body for both 'startIp=' and 'endIp=' parameters being present simultaneously, as the overflow is triggered via pptp_server_start_ip / pptp_server_end_ip arguments. ↗
  • →Use a PCRE to detect oversized values (200+ characters) in either startIp or endIp body parameters, which indicates a buffer overflow payload. ↗
  • ·The Snort/Suricata rule (sid:2061337) also covers CVE-2025-10803 and CVE-2025-10815 which share the same endpoint; tune or split the rule if per-CVE attribution is required. ↗
  • ·The exploit has been publicly disclosed; treat any matching traffic as high-confidence exploitation attempt (confidence: High, signature_severity: Major). ↗

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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