CVE-2025-7505Public exploitNetwork attack vector

Authenticated code execution via unchecked sprintf

Published Jul 12, 2025 · Updated Jul 15, 2025

Stack-based buffer overflow in Tenda FH451 1.0.0.9 allows remote authenticated users to execute code via a crafted HTTP POST request. The frmL7ProtForm handler passes the unchecked page parameter to sprintf, overflowing a stack buffer at /goform/L7Prot. Access to the affected handler is required; successful exploitation can execute code, while malformed attempts can crash the management service.

CVSS severity8.8
High
EPSS probability0.86%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Stack-based buffer overflow in Tenda FH451 1.0.0.9 allows remote authenticated users to execute code via a crafted HTTP POST request. The frmL7ProtForm handler passes the unchecked page parameter to sprintf, overflowing a stack buffer at /goform/L7Prot. Access to the affected handler is required; successful exploitation can execute code, while malformed attempts can crash the management service.

The record

CVE
CVE-2025-7505
Published
Jul 12, 2025
Updated
Jul 15, 2025
Vendor
Shenzhen Tenda Technology Co., Ltd.
Product
FH451
Classifications
CWE-121, CWE-119, T1190
Attack vector
network
Privileges
authenticated

Timeline

How it unfolded

  1. Jul 12, 2025CVE publishedPublication date reported by the CVE source.
  2. Jul 15, 2025Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

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Is a vulnerable build present?

Compare these published version ranges with your installed build and any vendor patches.

  1. Affected versionversion=1.0.0.9

What conditions does exploitation require?

Attack vectornetwork
Required privilegesauthenticated

What is affected?

Shenzhen Tenda Technology Co., Ltd. · FH451version=1.0.0.9

Published CVSS scores

7.4VulDBCVSS: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
9.0VulDBAV:N/AC:L/Au:S/C:C/I:C/A:C
8.8VulDBCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.

Daily unique IPsNo honeypot observations are available for this CVE in the selected window.

No observations available

Sep 10, 2026Sep 16, 2026
Latest reporting daySep 16, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesauthenticated
Known exploitationUnconfirmed
Public exploitPublished

Weakness, pattern, technique

CWE-121Stack-based Buffer Overflow
CWE-119Improper Restriction of Operations within the Bounds of a Memory Buffer
T1190Exploit Public-Facing Application

Public exploit references

Labels summarize the accepted research assessment. They do not indicate a test against your environment.

Technologies

Your stack

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Your stack

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