CVE-2025-11527Public exploitNetwork attack vector

Authenticated router crash via oversized PPPoE password

Published Oct 9, 2025 · Updated Oct 9, 2025

Stack-based buffer overflow in Tenda AC7 firmware 15.03.06.44 allows remote authenticated users to crash the router via PPPoE setup. The fast_setting_pppoe_set handler saves an oversized password under wan1.ppoe.pwd, and fast_setting_get later copies it into a fixed-size stack buffer without validating its length. Low-privileged web-management access is required; the demonstrated consequence is a router crash, while code execution remains unproven.

CVSS severity8.8
High
EPSS probability0.80%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
Coverage for this vulnerability

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Summary

What happened

Stack-based buffer overflow in Tenda AC7 firmware 15.03.06.44 allows remote authenticated users to crash the router via PPPoE setup. The fast_setting_pppoe_set handler saves an oversized password under wan1.ppoe.pwd, and fast_setting_get later copies it into a fixed-size stack buffer without validating its length. Low-privileged web-management access is required; the demonstrated consequence is a router crash, while code execution remains unproven.

The record

CVE
CVE-2025-11527
Published
Oct 9, 2025
Updated
Oct 9, 2025
Vendor
Shenzhen Tenda Technology Co., Ltd.
Product
AC7
Classifications
CWE-121, CWE-119, T1499.004
Attack vector
network
Privileges
authenticated

Timeline

How it unfolded

  1. Oct 9, 2025CVE publishedPublication date reported by the CVE source.
  2. Oct 9, 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=15.03.06.44

What conditions does exploitation require?

Attack vectornetwork
Required privilegesauthenticated

What is affected?

Shenzhen Tenda Technology Co., Ltd. · AC7version=15.03.06.44

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
8.8VulDBCVSS:3.1/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

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.

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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
T1499.004Application or System Exploitation

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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