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CVE-2025-2094
published 2025-03-07

CVE-2025-2094: A vulnerability was found in TOTOLINK EX1800T 9.1.0cu.2112_B20220316. It has been rated as critical. Affected by this issue is the function…

PriorityP274critical9.8CVSS 3.1
AVNACLPRNUINSUCHIHAH
EPSS
11.00%
95.3th percentile
A vulnerability was found in TOTOLINK EX1800T 9.1.0cu.2112_B20220316. It has been rated as critical. Affected by this issue is the function setWiFiExtenderConfig of the file /cgi-bin/cstecgi.cgi. The manipulation of the argument apcliKey/key leads to os command injection. The attack may be launched remotely. The exploit has been disclosed to the public and may be used.

Affected

2 ranges
VendorProductVersion rangeFixed in
totolinkex1800t——
totolinkex1800t_firmware——

Detection & IOCsextracted from sources · hover to see the quote

path/cgi-bin/cstecgi.cgi↗
snort
alert http any any -> $HOME_NET any (msg:"ET WEB_SPECIFIC_APPS Totolink EX1800T setWiFiExtenderConfig apcliKey/key command injection attempt (CVE-2025-2094)"; flow:established,to_server; http.method; content:"POST"; http.uri; bsize:20; content:"/cgi-bin/cstecgi.cgi"; http.request_body; content:"|22|topicurl|22 3a|"; content:"setting/setWifiExtenderConfig"; within:40; fast_pattern; pcre:"/\x22(?:key|apcliKey)\x22\x3a[^\x26\x2c\x7d]*?(?:(?:\x3b|%3[Bb])|(?:\x0a|%0[Aa])|(?:\x60|%60)|(?:\x7c|%7[Cc])|(?:\x24|%24))+/R"; reference:cve,2025-2094; reference:url,github.com/xiaoxiao78217821/cve-TOTOLINK-EX1800T/tree/main/TOTOLINK%20EX1800T; classtype:attempted-admin; sid:2062209; rev:1; metadata:affected_product TOTOLINK, attack_target Networking_Equipment, tls_state plaintext, created_at 2025_05_08, cve CVE_2025_2094, deployment Perimeter, deployment Internal, performance_impact Low, confidence High, signature_severity Major, tag Exploit, updated_at 2025_05_08, mitre_tactic_id TA0001, mitre_tactic_name Initial_Access, mitre_technique_id T1190, mitre_technique_name Exploit_Public_Facing_Application; target:dest_ip;)
  • →Target HTTP POST requests to /cgi-bin/cstecgi.cgi with a request body containing the topicurl field set to 'setting/setWifiExtenderConfig'
  • →Detect OS command injection characters (semicolon, newline, backtick, pipe, dollar sign — both raw and URL-encoded) in the 'key' or 'apcliKey' JSON parameters of the request body
  • →The vulnerability is in the function setWiFiExtenderConfig of /cgi-bin/cstecgi.cgi; the manipulated arguments are 'apcliKey' and 'key', enabling remote OS command injection ↗
  • →Traffic is expected in plaintext (not TLS); deploy detection at perimeter and internal network boundaries
  • ·The Snort/Suricata rule uses a fixed URI bsize of 20 bytes for /cgi-bin/cstecgi.cgi; ensure your sensor is configured to inspect HTTP request bodies (not just headers) for the body-based content matches to fire
  • ·Affected firmware version is TOTOLINK EX1800T 9.1.0cu.2112_B20220316; scope detection to this specific device/firmware where possible ↗

CVSS provenance

nvdv3.19.8CRITICALCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
nvdv4.05.3MEDIUMCVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:L/VI:L/VA:L/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
nvdv2.06.5MEDIUMAV:N/AC:L/Au:S/C:P/I:P/A:P
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