CVE-2025-11117Public exploitNetwork attack vector

Authenticated router crash via unchecked parameter copy

Published Sep 28, 2025 · Updated Sep 28, 2025

Buffer overflow in Tenda CH22 Firmware 1.0.0.1 allows remote authenticated users to crash the router through a crafted dips parameter. formWrlExtraGet copies the user-controlled value into the fixed-size v9 buffer without an effective length bound, overflowing it above 32 bytes. Low-privileged access to the web-management endpoint is required; the demonstrated result is service interruption and loss of router access.

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

What happened

Buffer overflow in Tenda CH22 Firmware 1.0.0.1 allows remote authenticated users to crash the router through a crafted dips parameter. formWrlExtraGet copies the user-controlled value into the fixed-size v9 buffer without an effective length bound, overflowing it above 32 bytes. Low-privileged access to the web-management endpoint is required; the demonstrated result is service interruption and loss of router access.

The record

CVE
CVE-2025-11117
Published
Sep 28, 2025
Updated
Sep 28, 2025
Vendor
Shenzhen Tenda Technology Co., Ltd.
Product
CH22 Firmware
Classifications
CWE-120, CWE-119, T1499.004
Attack vector
network
Privileges
authenticated

Timeline

How it unfolded

  1. Sep 28, 2025CVE publishedPublication date reported by the CVE source.
  2. Sep 28, 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=1.0.0.1

What conditions does exploitation require?

Attack vectornetwork
Required privilegesauthenticated

What is affected?

Shenzhen Tenda Technology Co., Ltd. · CH22 Firmwareversion=1.0.0.1

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.

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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-120Buffer Copy without Checking Size of Input ('Classic 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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