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CVE-2025-6121— D-Link DIR-632 HTTP POST Request get_pure_content stack-based overflow

Quick assessment

Affected
D-Link DIR-632
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.

D-Link DIR-632是中国友讯（D-Link）公司的一款路由器。 D-Link DIR-632 FW103B08版本存在安全漏洞，该漏洞源于对组件HTTP POST Request Handler中函数get_pure_content的参数Content-Length的错误操作导致栈缓冲区溢出。

CVSS 9.8 · Critical EPSS 1.99% · P79

Possible ATT&CK Techniques 1 AI

T1190 · Exploit Public-Facing Application
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I. Basic Information for CVE-2025-6121

Vulnerability Information
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Vulnerability Title
D-Link DIR-632 HTTP POST Request get_pure_content stack-based overflow
Source: CVE Program / CVE List V5
Vulnerability Description
A vulnerability, which was classified as critical, has been found in D-Link DIR-632 FW103B08. Affected by this issue is the function get_pure_content of the component HTTP POST Request Handler. The manipulation of the argument Content-Length leads to stack-based buffer overflow. The attack may be launched remotely. The exploit has been disclosed to the public and may be used. This vulnerability only affects products that are no longer supported by the maintainer.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Source: CVE Program / CVE List V5
Vulnerability Type
栈缓冲区溢出
Source: CVE Program / CVE List V5
Vulnerability Title
D-Link DIR-632 安全漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
D-Link DIR-632是中国友讯（D-Link）公司的一款路由器。 D-Link DIR-632 FW103B08版本存在安全漏洞，该漏洞源于对组件HTTP POST Request Handler中函数get_pure_content的参数Content-Length的错误操作导致栈缓冲区溢出。
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)

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Affected Products

Vendor Product Affected Versions CPE Subscribe
D-Link DIR-632 FW103B08 -

II. Public POCs for CVE-2025-6121

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Qwen3.6-35B-A3B · 11435 chars
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III. Intelligence Information for CVE-2025-6121

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Vendor Pages for CVE-2025-6121 (1)

Same Patch Batch · D-Link · 2025-06-16 · 3 CVEs total

CVE-2025-6115 8.8 HIGH D-Link DIR-619L form_macfilter stack-based overflow
CVE-2025-6114 8.8 HIGH D-Link DIR-619L form_portforwarding stack-based overflow

IV. Related Vulnerabilities

Same product: DIR-632
Same vendor: D-Link
Same weakness: CWE-121

V. Comments for CVE-2025-6121

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