CVE-2025-12236: A vulnerability was determined in Tenda CH22 1.0.0.1. This issue affects the function fromDhcpListClient of the file /goform/DhcpListClient. This manipulation…

PriorityP267high8.8CVSS 3.1

AVNACLPRLUINSUCHIHAH

EPSS

3.18%

86.5th percentile

A vulnerability was determined in Tenda CH22 1.0.0.1. This issue affects the function fromDhcpListClient of the file /goform/DhcpListClient. This manipulation of the argument page causes buffer overflow. Remote exploitation of the attack is possible. The exploit has been publicly disclosed and may be utilized.

Affected

2 ranges

Vendor	Product	Version range	Fixed in
tenda	ch22	—	—
tenda	ch22_firmware	—	—

Detection & IOCsextracted from sources · hover to see the quote

path/goform/DhcpListClient

urlgithub.com/WhereisDoujo/CVE/issues/1

urlgithub.com/peris-navince/founded-0-days/blob/main/Tenda/ac500/fromDhcpListClient/1.md

snort

alert http any any -> $HOME_NET any (msg:"ET WEB_SPECIFIC_APPS Tenda DhcpListClient page Parameter Buffer Overflow Attempt (CVE,2025-12236, CVE-2024-32293, CVE-2024-41462)"; flow:established,to_server; http.method; content:"POST"; http.uri; bsize:22; content:"/goform/DhcpListClient"; fast_pattern; http.request_body; content:"page|3d|"; pcre:"/^[^&]{100,}(?:&|$)/R"; reference:cve,2024-32293; reference:url,github.com/WhereisDoujo/CVE/issues/1; reference:cve,2024-41462; reference:url,github.com/peris-navince/founded-0-days/blob/main/Tenda/ac500/fromDhcpListClient/1.md; reference:cve,2025-12236; classtype:web-application-attack; sid:2063028; rev:2; metadata:affected_product Tenda, attack_target Networking_Equipment, tls_state plaintext, created_at 2025_06_17, cve CVE_2024_32293, deployment Perimeter, deployment Internal, performance_impact Low, confidence High, signature_severity Major, tag Exploit, tag Description_Generated_By_Proofpoint_Nexus, updated_at 2025_10_10, 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 /goform/DhcpListClient with a 'page' parameter value exceeding 100 characters (buffer overflow trigger). Match on POST method, exact URI length of 22 bytes, body containing 'page=' followed by >=100 non-ampersand characters.
→Traffic is plaintext (no TLS); deploy detection at perimeter and internal network boundaries targeting inbound HTTP to networking equipment.
→The vulnerability resides in the function fromDhcpListClient of the file /goform/DhcpListClient; the 'page' argument is the manipulated parameter causing the stack/heap overflow. ↗
→Public exploit PoCs are available on GitHub; threat actors may directly weaponize disclosed code. Monitor for scanning/exploitation attempts against Tenda CH22 1.0.0.1 devices. ↗

·The Snort/Suricata rule (sid:2063028) covers three CVEs simultaneously (CVE-2025-12236, CVE-2024-32293, CVE-2024-41462); tune alerting context accordingly to avoid attribution confusion across different Tenda device models.
·The PCRE threshold of 100 characters for the 'page' parameter is the detection boundary; legitimate traffic with long page values could produce false positives — validate against baseline traffic before deploying in block mode.

CVSS provenance

nvdv3.18.8HIGHCVSS:3.1/AV:N/AC:L/PR:L/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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