CVE-2025-8978Public exploitNetwork attack vector

Code execution via reusable firmware verification marker

Published Aug 14, 2025 · Updated Aug 14, 2025

Insufficient firmware authentication in D-Link DIR-619L 6.02CN02 allows remote authenticated users to execute code via a crafted image. The boa FirmwareUpgrade function checks uploaded images for reusable hard-coded markers such as F69B instead of cryptographically authenticating their contents. Administrative access to the firmware-upload interface is required; a tampered image bearing those markers can run arbitrary code or interrupt the router.

CVSS severity8.1
High
EPSS probability0.50%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Insufficient firmware authentication in D-Link DIR-619L 6.02CN02 allows remote authenticated users to execute code via a crafted image. The boa FirmwareUpgrade function checks uploaded images for reusable hard-coded markers such as F69B instead of cryptographically authenticating their contents. Administrative access to the firmware-upload interface is required; a tampered image bearing those markers can run arbitrary code or interrupt the router.

The record

CVE
CVE-2025-8978
Published
Aug 14, 2025
Updated
Aug 14, 2025
Vendor
D-Link
Product
DIR-619L
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=6.02CN02

What conditions does exploitation require?

Attack vectornetwork
Required privilegesadmin

What is affected?

D-Link · DIR-619Lversion=6.02CN02

Published CVSS scores

6.8VulDBAV:N/AC:H/Au:M/C:C/I:C/A:C/E:POC/RL:ND/RC:UR
6.6VulDBCVSS:3.0/AV:N/AC:H/PR:H/UI:N/S:U/C:H/I:H/A:H/E:P/RL:X/RC:R
6.6VulDBCVSS:3.1/AV:N/AC:H/PR:H/UI:N/S:U/C:H/I:H/A:H/E:P/RL:X/RC:R
8.1NIST NVDCVSS:3.1/AV:N/AC:H/PR:N/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

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
Privilegesadmin
Known exploitationUnconfirmed
Public exploitPublished

Weakness, pattern, technique

CWE-345Insufficient Verification of Data Authenticity
T1601.001Modify System Image: Patch 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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