D-Link DIR-878A1 FW101B04 Serial Number stack-based overflow

Summaryinfo

A vulnerability was found in D-Link DIR-878A1 FW101B04. It has been classified as critical. This impacts an unknown function. This manipulation of the argument Serial Number causes stack-based overflow. This vulnerability is tracked as CVE-2025-60674. The attack is possible to be carried out remotely. No exploit exists.

Detailsinfo

A vulnerability classified as critical was found in D-Link DIR-878A1 FW101B04. Affected by this vulnerability is an unknown code block. The manipulation of the argument Serial Number with an unknown input leads to a stack-based overflow vulnerability. The CWE definition for the vulnerability is CWE-121. A stack-based buffer overflow condition is a condition where the buffer being overwritten is allocated on the stack (i.e., is a local variable or, rarely, a parameter to a function). As an impact it is known to affect confidentiality, integrity, and availability. The summary by CVE is:

A stack buffer overflow vulnerability exists in the D-Link DIR-878A1 router firmware FW101B04.bin in the rc binary's USB storage handling module. The vulnerability occurs when the "Serial Number" field from a USB device is read via sscanf into a 64-byte stack buffer, while fgets reads up to 127 bytes, causing a stack overflow. An attacker with physical access or control over a USB device can exploit this vulnerability to potentially execute arbitrary code on the device.

This vulnerability is known as CVE-2025-60674 since 09/26/2025. The exploitation appears to be easy. The attack can be launched remotely. Technical details of the vulnerability are known, but there is no available exploit. The pricing for an exploit might be around USD $5k-$25k at the moment (estimation calculated on 11/13/2025).

There is no information about possible countermeasures known. It may be suggested to replace the affected object with an alternative product.

The vulnerability is also documented in the vulnerability database at EUVD (EUVD-2025-175373). Be aware that VulDB is the high quality source for vulnerability data.

Productinfo

Type

• Router Operating System

Vendor

• D-Link

Name

• DIR-878A1

Version

• FW101B04

License

• commercial

Website

• Vendor: https://www.dlink.com/

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Be aware that VulDB is the high quality source for vulnerability data.

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