CVE-2025-8980Public exploitNetwork attack vector

Authenticated code execution via forgeable firmware checks

Published Aug 14, 2025 · Updated Aug 14, 2025

Insufficient firmware verification in Tenda G1 16.01.7.8(3660) allows remote authenticated users to install crafted firmware. The check_upload_file path accepts images validated only by a hard-coded authentication value and a forgeable CRC, allowing tampered code to be written. Administrator access to the firmware update interface and a specially crafted image are required; successful exploitation executes arbitrary code or crashes the router.

CVSS severity7.5
High
EPSS probability0.34%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Insufficient firmware verification in Tenda G1 16.01.7.8(3660) allows remote authenticated users to install crafted firmware. The check_upload_file path accepts images validated only by a hard-coded authentication value and a forgeable CRC, allowing tampered code to be written. Administrator access to the firmware update interface and a specially crafted image are required; successful exploitation executes arbitrary code or crashes the router.

The record

CVE
CVE-2025-8980
Published
Aug 14, 2025
Updated
Aug 14, 2025
Vendor
Shenzhen Tenda Technology Co., Ltd.
Product
G1
Classifications
CWE-345, T1601.001
Attack vector
network
Privileges
admin

Timeline

How it unfolded

  1. Aug 14, 2025CVE publishedPublication date reported by the CVE source.
  2. Aug 14, 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=16.01.7.8(3660)

What conditions does exploitation require?

Attack vectornetwork
Required privilegesadmin

What is affected?

Shenzhen Tenda Technology Co., Ltd. · G1version=16.01.7.8(3660)

Published CVSS scores

7.5VulDBCVSS:4.0/AV:N/AC:H/AT:N/PR:H/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N
6.6VulDBCVSS:3.1/AV:N/AC:H/PR:H/UI:N/S:U/C:H/I:H/A:H
6.6VulDBCVSS:4.0/AV:N/AC:H/AT:N/PR:H/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:P
6.8VulDBAV:N/AC:H/Au:M/C:C/I:C/A:C
6.6VulDBCVSS:3.0/AV:N/AC:H/PR:H/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 9, 2026Sep 15, 2026
Latest reporting daySep 15, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesadmin
Known exploitationUnconfirmed
Public exploitPublished

Weakness, pattern, technique

CWE-345Insufficient Verification of Data Authenticity
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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