CVE-2025-12234: A vulnerability has been found in Tenda CH22 1.0.0.1. This affects the function fromSafeMacFilter of the file /goform/SafeMacFilter. The manipulation of the…

PriorityP264high8.8CVSS 3.1

AVNACLPRLUINSUCHIHAH

EPSS

1.00%

58.5th percentile

A vulnerability has been found in Tenda CH22 1.0.0.1. This affects the function fromSafeMacFilter of the file /goform/SafeMacFilter. The manipulation of the argument page leads to buffer overflow. The attack may be initiated remotely. The exploit has been disclosed to the public and may be used.

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/SafeMacFilter↗

snort

alert http any any -> $HOME_NET any (msg:"ET WEB_SPECIFIC_APPS Tenda SafeMacFilter page Parameter Buffer Overflow Attempt (CVE-2025-12234)"; flow:established,to_server; http.method; content:"POST"; http.uri; bsize:21; content:"/goform/SafeMacFilter"; fast_pattern; http.request_body; content:"page|3d|"; pcre:"/^[^&]{100,}(?:&|$)/R"; reference:url,github.com/QIU-DIE/CVE/issues/15; reference:cve,2025-12234; classtype:web-application-attack; sid:2065418; rev:1; metadata:affected_product Tenda, attack_target Networking_Equipment, tls_state plaintext, created_at 2025_10_27, cve CVE_2025_12234, deployment Perimeter, deployment Internal, performance_impact Low, confidence High, signature_severity Major, tag Exploit, tag Description_Generated_By_Proofpoint_Nexus, updated_at 2025_10_27, mitre_tactic_id TA0001, mitre_tactic_name Initial_Access, mitre_technique_id T1190, mitre_technique_name Exploit_Public_Facing_Application; target:dest_ip;)

→Exploit uses HTTP POST method targeting the URI /goform/SafeMacFilter (exactly 21 bytes). Detection should match POST requests to this exact URI path.
→The overflow is triggered via the 'page' parameter in the POST request body. Look for 'page=' (encoded as page|3d|) followed by 100 or more non-ampersand characters, indicating an oversized value.
→Attack is plaintext (non-TLS) and targets networking equipment at the perimeter or internally. Scope detection to unencrypted HTTP traffic toward home/internal network devices.
→The vulnerability is remotely exploitable with no authentication implied; the exploit has been publicly disclosed. Prioritize detection on internet-facing Tenda CH22 devices. ↗

·The Snort/Suricata rule (sid:2065418) targets only plaintext HTTP. If the Tenda CH22 management interface is ever accessed over HTTPS or through a reverse proxy, this rule will not fire.
·The URI bsize match is set to exactly 21 bytes (/goform/SafeMacFilter). Any URL encoding or path prefix added by a proxy or WAF will cause the rule to miss.
·The PCRE threshold for the page parameter is 100+ non-ampersand characters. Payloads shorter than 100 characters that still cause overflow (e.g., due to stack layout differences in firmware variants) will evade this rule.

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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