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CVE-2025-6400— TOTOLINK N300RH HTTP POST Message formPortFw buffer overflow

Quick assessment

Affected
TOTOLINK N300RH
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.

TOTOLINK N300RH是中国吉翁电子（TOTOLINK）公司的一款长距离无线路由器。 TOTOLINK N300RH 6.1c.1390_B20191101版本存在安全漏洞，该漏洞源于文件/boafrm/formPortFw中参数service_type的错误操作导致缓冲区溢出。

CVSS 8.8 · High EPSS 0.96% · P60
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I. Basic Information for CVE-2025-6400

Vulnerability Information
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Vulnerability Title
TOTOLINK N300RH HTTP POST Message formPortFw buffer overflow
Source: CVE Program / CVE List V5
Vulnerability Description
A vulnerability was found in TOTOLINK N300RH 6.1c.1390_B20191101 and classified as critical. Affected by this issue is some unknown functionality of the file /boafrm/formPortFw of the component HTTP POST Message Handler. The manipulation of the argument service_type leads to buffer overflow. The attack may be launched remotely. The exploit has been disclosed to the public and may be used.
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
TOTOLINK N300RH 安全漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
TOTOLINK N300RH是中国吉翁电子（TOTOLINK）公司的一款长距离无线路由器。 TOTOLINK N300RH 6.1c.1390_B20191101版本存在安全漏洞，该漏洞源于文件/boafrm/formPortFw中参数service_type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
TOTOLINK N300RH 6.1c.1390_B20191101 -

II. Public POCs for CVE-2025-6400

# POC Description Source Link Shenlong Link
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Qwen3.6-35B-A3B · 7969 chars
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III. Intelligence Information for CVE-2025-6400

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Security Blog Posts for CVE-2025-6400 (1)

Other References for CVE-2025-6400 (1)

Same Patch Batch · TOTOLINK · 2025-06-21 · 5 CVEs total

CVE-2025-6402 8.8 HIGH TOTOLINK X15 HTTP POST Request formIpv6Setup buffer overflow
CVE-2025-6399 8.8 HIGH TOTOLINK X15 HTTP POST Request formIPv6Addr buffer overflow
CVE-2025-6393 8.8 HIGH TOTOLINK A702R/A3002R/A3002RU/EX1200T HTTP POST Request formIPv6Addr buffer overflow
CVE-2025-6401 3.5 LOW TOTOLINK N300RH HTTP POST Message formFilter denial of service

IV. Related Vulnerabilities

Same product: N300RH
Same vendor: TOTOLINK
Same weakness: CWE-120

V. Comments for CVE-2025-6400

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