CVE-2025-11328: A vulnerability was detected in Tenda AC18 15.03.05.19(6318). This issue affects some unknown processing of the file /goform/SetDDNSCfg. The manipulation of…

PriorityP268high8.8CVSS 3.1

AVNACLPRLUINSUCHIHAH

EPSS

0.99%

58.4th percentile

A vulnerability was detected in Tenda AC18 15.03.05.19(6318). This issue affects some unknown processing of the file /goform/SetDDNSCfg. The manipulation of the argument ddnsEn results in stack-based buffer overflow. It is possible to launch the attack remotely. The exploit is now public and may be used.

Affected

2 ranges

Vendor	Product	Version range	Fixed in
tenda	ac18	—	—
tenda	ac18_firmware	—	—

Detection & IOCsextracted from sources · hover to see the quote

url/goform/SetDDNSCfg↗

url/goform/GetRouterStatus

snort

alert http any any -> $HOME_NET any (msg:"ET WEB_SPECIFIC_APPS Tenda GetRouterStatus newVersion Parameter Buffer Overflow Attempt (CVE-2025-11328)"; flow:established,to_server; http.method; content:"POST"; http.uri; bsize:23; content:"/goform/GetRouterStatus"; fast_pattern; http.request_body; content:"newVersion|3d|"; pcre:"/^[^&]{100,}(?:&|$)/R"; reference:url,github.com/noahze01/IoT-vulnerable/blob/main/Tenda/AC18/SetDDNSCfg.md; reference:cve,2025-11328; classtype:web-application-attack; sid:2065061; rev:1; metadata:affected_product Tenda, attack_target Networking_Equipment, tls_state plaintext, created_at 2025_10_06, cve CVE_2025_11328, deployment Perimeter, deployment Internal, performance_impact Low, confidence High, signature_severity Major, tag Exploit, tag Description_Generated_By_Proofpoint_Nexus, updated_at 2025_10_06, 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/GetRouterStatus with a newVersion parameter value exceeding 100 characters (stack-based buffer overflow trigger).
→The vulnerable parameter in the request body is newVersion (URL-encoded as newVersion=), where an oversized value (>=100 bytes before & or end-of-body) triggers the overflow.
→The underlying vulnerable code path is in /goform/SetDDNSCfg via the ddnsEn argument; monitor both endpoints on Tenda AC18 firmware 15.03.05.19(6318). ↗
→Attack is remotely exploitable over plaintext HTTP (tls_state: plaintext); deploy detection at perimeter and internal network boundaries.

·The Snort/Suricata rule (ET sid:2065061) targets /goform/GetRouterStatus with the newVersion parameter, but the NVD advisory attributes the vulnerability to /goform/SetDDNSCfg and the ddnsEn argument. Ensure coverage of both endpoints when deploying detection.
·The exploit is publicly available; treat all Tenda AC18 devices running firmware 15.03.05.19(6318) as immediately at risk. ↗

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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