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CVE-2025-6733— UTT HiPER 840G API formConfigDnsFilterGlobal sub_416928 buffer overflow

Quick assessment

Affected
UTT HiPER 840G
Exploitation
Public or AI PoC available; prioritize validation
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.

UTT HiPER 840G是中国艾泰（UTT）公司的一款千兆企业级高性能路由器。 UTT HiPER 840G 3.1.1-190328及之前版本存在安全漏洞，该漏洞源于对文件/goform/formConfigDnsFilterGlobal中参数GroupName的错误操作,导致缓冲区溢出。

CVSS 8.8 · High EPSS 0.85% · P56

Possible ATT&CK Techniques 1 AI

T1190 · Exploit Public-Facing Application
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I. Basic Information for CVE-2025-6733

Vulnerability Information
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Vulnerability Title
UTT HiPER 840G API formConfigDnsFilterGlobal sub_416928 buffer overflow
Source: CVE Program / CVE List V5
Vulnerability Description
A vulnerability was found in UTT HiPER 840G up to 3.1.1-190328. It has been declared as critical. This vulnerability affects the function sub_416928 of the file /goform/formConfigDnsFilterGlobal of the component API. The manipulation of the argument GroupName leads to buffer overflow. The attack can be initiated remotely. The exploit has been disclosed to the public and may be used. The vendor was contacted early about this disclosure but did not respond in any way.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
Source: CVE Program / CVE List V5
Vulnerability Type
未进行输入大小检查的缓冲区拷贝(传统缓冲区溢出)
Source: CVE Program / CVE List V5
Vulnerability Title
UTT HiPER 840G 安全漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
UTT HiPER 840G是中国艾泰（UTT）公司的一款千兆企业级高性能路由器。 UTT HiPER 840G 3.1.1-190328及之前版本存在安全漏洞，该漏洞源于对文件/goform/formConfigDnsFilterGlobal中参数GroupName的错误操作,导致缓冲区溢出。
Source: CNNVD (China National Vulnerability Database)
CVSS Information
N/A
Source: CNNVD (China National Vulnerability Database)
Vulnerability Type
N/A
Source: CNNVD (China National Vulnerability Database)

Affected Products

Vendor Product Affected Versions CPE Subscribe
UTT HiPER 840G 3.1.1-190328 -

II. Public POCs for CVE-2025-6733

# POC Description Source Link Shenlong Link
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Qwen3.6-35B-A3B · 8372 chars
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III. Intelligence Information for CVE-2025-6733

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News Coverage for CVE-2025-6733 (1)

Other References for CVE-2025-6733 (1)

Same Patch Batch · UTT · 2025-06-26 · 3 CVEs total

CVE-2025-6732 8.8 HIGH UTT HiPER 840G API setSysAdm strcpy buffer overflow
CVE-2025-6734 8.8 HIGH UTT HiPER 840G API formP2PLimitConfig sub_484E40 buffer overflow

IV. Related Vulnerabilities

Same product: HiPER 840G
Same vendor: UTT
Same weakness: CWE-120

V. Comments for CVE-2025-6733

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