CVE-2025-12233: A flaw has been found in Tenda CH22 1.0.0.1. Affected by this issue is the function fromSafeUrlFilter of the file /goform/SafeUrlFilter. Executing a…

PriorityP268high8.8CVSS 3.1

AVNACLPRLUINSUCHIHAH

EPSS

4.38%

90.2th percentile

A flaw has been found in Tenda CH22 1.0.0.1. Affected by this issue is the function fromSafeUrlFilter of the file /goform/SafeUrlFilter. Executing a manipulation of the argument page can lead to buffer overflow. The attack can be launched remotely. The exploit has been published 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/SafeUrlFilter

snort

alert http any any -> $HOME_NET any (msg:"ET WEB_SPECIFIC_APPS Tenda SafeUrlFilter page Parameter Buffer Overflow Attempt (CVE-2025-12233)"; flow:established,to_server; http.method; content:"POST"; http.uri; bsize:21; content:"/goform/SafeUrlFilter"; fast_pattern; http.request_body; content:"page|3d|"; pcre:"/^[^&]{100,}(?:&|$)/R"; reference:url,github.com/QIU-DIE/CVE/issues/14; reference:cve,2025-12233; classtype:web-application-attack; sid:2065419; rev:1; metadata:affected_product Tenda, attack_target Networking_Equipment, tls_state plaintext, created_at 2025_10_27, cve CVE_2025_12233, 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 exact URI /goform/SafeUrlFilter with a URI length of exactly 21 bytes.
→The overflow is triggered via the `page` parameter in the POST body; look for `page=` (encoded as `page|3d|`) followed by 100 or more non-ampersand characters.
→Attack is plaintext (non-TLS) and targets networking equipment on the internal or perimeter network; monitor inbound HTTP to Tenda CH22 devices.
→MITRE mapping: Initial Access (TA0001) via Exploit Public-Facing Application (T1190).

·Affected product is Tenda CH22 firmware version 1.0.0.1 only; the vulnerable function is `fromSafeUrlFilter` in the `/goform/SafeUrlFilter` endpoint. ↗
·Public exploit code is available; treat any matching traffic as high-confidence malicious activity. ↗

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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