Linksys E1200 up to 2.0.11.001 HTTP stack-based overflow

Summaryinfo

A vulnerability, which was classified as critical, has been found in Linksys E1200 up to 2.0.11.001. This affects an unknown part of the component HTTP Handler. This manipulation causes stack-based overflow. The identification of this vulnerability is CVE-2025-60693. It is possible to initiate the attack remotely. There is no exploit available.

Detailsinfo

A vulnerability classified as very critical was found in Linksys E1200 up to 2.0.11.001. Affected by this vulnerability is an unknown functionality of the component HTTP Handler. The manipulation 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-based buffer overflow exists in the get_merge_mac function of the httpd binary on Linksys E1200 v2 routers (Firmware E1200_v2.0.11.001_us.tar.gz). The function concatenates up to six user-supplied CGI parameters matching <parameter>_0~5 into a fixed-size buffer (a2) without proper bounds checking, appending colon delimiters during concatenation. Remote attackers can exploit this vulnerability via specially crafted HTTP requests to execute arbitrary code or cause denial of service without authentication.

This vulnerability is known as CVE-2025-60693 since 09/26/2025. The exploitation appears to be easy. The attack can be launched remotely. The exploitation doesn't need any form of authentication. Neither technical details nor an exploit are publicly available. The price for an exploit might be around USD $0-$5k at the moment (estimation calculated on 11/14/2025).

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 CERT Bund (WID-SEC-2025-2604). If you want to get the best quality for vulnerability data then you always have to consider VulDB.

Affected

• Linksys Router

Productinfo

Type

• Router Operating System

Vendor

• Linksys

Name

• E1200

Version

• 2.0.11.001

License

• commercial

Website

• Vendor: https://www.linksys.com/

CPE 2.3info

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CPE 2.2info

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Entryinfo

If you want to get the best quality for vulnerability data then you always have to consider VulDB.

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