CVE-2025-5527Public exploitNetwork attack vector

Authenticated code execution via unbounded route parsing

Published Jun 3, 2025 · Updated Jun 4, 2025

Stack-based buffer overflow in Tenda RX3 16.03.13.11_multi_TDE01 allows remote authenticated users to execute code via a crafted route list. The save_staticroute_data function parses the list parameter with unbounded sscanf conversions into four 16-byte stack buffers, overwriting the return address. A logged-in web session or same-LAN CSRF position reaches the handler; exploitation grants a root shell, while one request can crash httpd.

CVSS severity8.7
High
EPSS probability11.86%
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 RX3 16.03.13.11_multi_TDE01 allows remote authenticated users to execute code via a crafted route list. The save_staticroute_data function parses the list parameter with unbounded sscanf conversions into four 16-byte stack buffers, overwriting the return address. A logged-in web session or same-LAN CSRF position reaches the handler; exploitation grants a root shell, while one request can crash httpd.

The record

CVE
CVE-2025-5527
Published
Jun 3, 2025
Updated
Jun 4, 2025
Vendor
Shenzhen Tenda Technology Co., Ltd.
Product
RX3
Classifications
CWE-121, CWE-119, CWE-787, T1190
Attack vector
network
Privileges
authenticated

Timeline

How it unfolded

  1. Jun 3, 2025CVE publishedPublication date reported by the CVE source.
  2. Jun 4, 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=16.03.13.11_multi_TDE01

What conditions does exploitation require?

Attack vectornetwork
Required privilegesauthenticated

What is affected?

Shenzhen Tenda Technology Co., Ltd. · RX3version=16.03.13.11_multi_TDE01

Published CVSS scores

8.7VulDBCVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N
8.8VulDBCVSS:3.0/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
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
CWE-787Out-of-bounds Write
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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