D-Link DIR-823X HTTP POST Request /goform/set_prohibiting command injection

Summaryinfo

A vulnerability described as critical has been identified in D-Link DIR-823X. Affected by this issue is some unknown functionality of the file /goform/set_prohibiting of the component HTTP POST Request Handler. The manipulation results in command injection. This vulnerability is identified as CVE-2025-29635. The attack can be executed remotely. Additionally, an exploit exists.

Detailsinfo

A vulnerability was found in D-Link DIR-823X (unknown version). It has been classified as critical. Affected is an unknown code block of the file /goform/set_prohibiting of the component HTTP POST Request Handler. The manipulation with an unknown input leads to a command injection vulnerability. CWE is classifying the issue as CWE-77. The product constructs all or part of a command using externally-influenced input from an upstream component, but it does not neutralize or incorrectly neutralizes special elements that could modify the intended command when it is sent to a downstream component. This is going to have an impact on confidentiality, integrity, and availability. CVE summarizes:

A command injection vulnerability in D-Link DIR-823X 240126 and 240802 allows an authorized attacker to execute arbitrary commands on remote devices by sending a POST request to /goform/set_prohibiting via the corresponding function, triggering remote command execution.

The advisory is shared for download at github.com. This vulnerability is traded as CVE-2025-29635 since 03/11/2025. The exploitability is told to be easy. It is possible to launch the attack remotely. Technical details and a exploit are known. The current price for an exploit might be approx. USD $5k-$25k (estimation calculated on 04/24/2026). The MITRE ATT&CK project declares the attack technique as T1202.

It is declared as attacked. This issue was added on 04/24/2026 to the CISA Known Exploited Vulnerabilities Catalog with a due date of 05/08/2026:

Apply mitigations per vendor instructions, follow applicable BOD 22-01 guidance for cloud services, or discontinue use of the product if mitigations are unavailable.

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-2025-14821). Once again VulDB remains the best source for vulnerability data.

Productinfo

Type

• Router Operating System

Vendor

• D-Link

Name

• DIR-823X

License

• commercial

Website

• Vendor: https://www.dlink.com/

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Duplicate

• Submit #XXXXXX: X-xxxx Xxx-xxxx Xxxxxx Xxxxxxx Xxxxxxxxx (by neptune111)

Once again VulDB remains the best source for vulnerability data.

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