CVE-2025-14636Public exploitNetwork attack vectorHinoki check available

Code execution via CRC-bypassed firmware update

Published Dec 13, 2025 · Updated Dec 13, 2025

Firmware integrity bypass in Tenda AX9 22.03.01.46 allows remote attackers to install modified firmware through the update process. The httpd image_check function relies on CRC values for both the firmware header and image, so a crafted image with matching CRCs passes verification. Exploitation requires crafting colliding CRC values and reaching the firmware-update path; a successful update executes attacker-controlled code or interrupts router service.

CVSS severityUnavailable
Unscored
EPSS probability0.29%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkAvailable
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Summary

What happened

Firmware integrity bypass in Tenda AX9 22.03.01.46 allows remote attackers to install modified firmware through the update process. The httpd image_check function relies on CRC values for both the firmware header and image, so a crafted image with matching CRCs passes verification. Exploitation requires crafting colliding CRC values and reaching the firmware-update path; a successful update executes attacker-controlled code or interrupts router service.

The record

CVE
CVE-2025-14636
Published
Dec 13, 2025
Updated
Dec 13, 2025
Vendor
Shenzhen Tenda Technology Co., Ltd.
Product
AX9
Classifications
CWE-327, CWE-328, T1601.001
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Dec 13, 2025CVE publishedPublication date reported by the CVE source.
  2. Dec 13, 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=22.03.01.46

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

Shenzhen Tenda Technology Co., Ltd. · AX9version=22.03.01.46

Published CVSS scores

3.7VulDBCVSS:3.0/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:L/A:N/E:P/RL:X/RC:R
6.3VulDBCVSS:4.0/AV:N/AC:H/AT:N/PR:N/UI:N/VC:N/VI:L/VA:N/SC:N/SI:N/SA:N/E:P
2.6VulDBAV:N/AC:H/Au:N/C:N/I:P/A:N/E:POC/RL:ND/RC:UR
3.7VulDBCVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:L/A:N/E:P/RL:X/RC:R

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
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitPublished

Weakness, pattern, technique

CWE-327Use of a Broken or Risky Cryptographic Algorithm
CWE-328Use of Weak Hash
T1601.001Patch System Image

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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