CVE-2025-12271: A vulnerability was identified in Tenda CH22 1.0.0.1. This affects the function fromRouteStatic of the file /goform/RouteStatic. Such manipulation of the…

PriorityP263critical9.8CVSS 3.1

AVNACLPRNUINSUCHIHAH

EPSS

0.94%

56.6th percentile

A vulnerability was identified in Tenda CH22 1.0.0.1. This affects the function fromRouteStatic of the file /goform/RouteStatic. Such manipulation of the argument page leads to buffer overflow. The attack can be launched remotely. The exploit is publicly available and might 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/RouteStatic

urlhttps://github.com/QIU-DIE/CVE/issues/20

snort

alert http any any -> $HOME_NET any (msg:"ET WEB_SPECIFIC_APPS Tenda RouteStatic page Parameter Buffer Overflow Attempt (CVE-2025-12271)"; flow:established,to_server; http.method; content:"POST"; http.uri; bsize:19; content:"/goform/RouteStatic"; fast_pattern; http.request_body; content:"page|3d|"; pcre:"/^[^&]{100,}(?:&|$)/R"; reference:url,github.com/QIU-DIE/CVE/issues/20; reference:cve,2025-12271; classtype:web-application-attack; sid:2065415; rev:1; metadata:affected_product Tenda, attack_target Networking_Equipment, tls_state plaintext, created_at 2025_10_27, cve CVE_2025_12271, 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 traffic is HTTP POST only — filter on POST method to /goform/RouteStatic (exact URI length 19 bytes).
→The overflow is triggered via the `page` parameter in the POST body; look for `page=` (hex `page|3d|`) followed by 100 or more non-ampersand characters as the oversized payload.
→Traffic is expected in plaintext (no TLS); deploy detection at the network perimeter and internally.
→The vulnerability resides in function `fromRouteStatic` of the file `/goform/RouteStatic` on Tenda CH22 version 1.0.0.1; scope detection to that specific endpoint on networking equipment. ↗

·The exploit is publicly available; treat any matching traffic as high-confidence malicious activity rather than a probe. ↗
·The Snort/Suricata rule (sid:2065415) uses a PCRE match on the request body (`/^[^&]{100,}(?:&|$)/R`); ensure your IDS/IPS engine supports relative PCRE anchoring (`/R` flag) to avoid false negatives.

CVSS provenance

nvdv3.19.8CRITICALCVSS:3.1/AV:N/AC:L/PR:N/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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