CVE-2025-15391
Unknown Unknown - Not Provided
Remote Command Injection in D-Link DIR-806A SSDP Handler

Publication date: 2025-12-31

Last updated on: 2026-04-29

Assigner: VulDB

Description
A weakness has been identified in D-Link DIR-806A 100CNb11. Affected is the function ssdpcgi_main of the component SSDP Request Handler. This manipulation causes command injection. The attack can be initiated remotely. The exploit has been made available to the public and could be exploited. This vulnerability only affects products that are no longer supported by the maintainer.
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Meta Information
Published
2025-12-31
Last Modified
2026-04-29
Generated
2026-06-16
AI Q&A
2025-12-31
EPSS Evaluated
2026-06-15
NVD
CVE-2025-15391
Affected Vendors & Products
Showing 1 associated CPE
Vendor Product Version / Range
d-link dir-806a 100cnb11
Helpful Resources
Exploitability
CWE
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KEV
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CWE ID Description
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.
CWE-74 The product constructs all or part of a command, data structure, or record using externally-influenced input from an upstream component, but it does not neutralize or incorrectly neutralizes special elements that could modify how it is parsed or interpreted when it is sent to a downstream component.
Attack-Flow Graph
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Executive Summary

This vulnerability is a command injection flaw in the D-Link DIR-806A 100CNb11 router, specifically in the SSDP Request Handler's ssdpcgi_main function. It occurs because the router does not properly sanitize the HTTP_ST header in SSDP requests before using it in system commands. An attacker can send specially crafted SSDP requests with malicious payloads in this header, allowing them to execute arbitrary system commands remotely on the device. [1, 3]

Impact Analysis

Exploitation of this vulnerability can compromise the confidentiality, integrity, and availability of the affected router. An attacker can remotely execute arbitrary commands on the device without authentication, potentially taking full control of the router, disrupting network services, stealing sensitive information, or using the device as a foothold for further attacks. Since the product is no longer supported, no official mitigations are available. [3]

Detection Guidance

Detection can involve monitoring for unusual SSDP requests containing suspicious or malformed HTTP_ST headers that may indicate command injection attempts. Since the vulnerability involves the HTTP_ST header in SSDP requests, network traffic capture tools like tcpdump or Wireshark can be used to filter SSDP packets and inspect the HTTP_ST header for suspicious payloads. For example, using tcpdump: `tcpdump -i <interface> udp port 1900 -A | grep HTTP_ST` to capture and analyze SSDP traffic. Additionally, checking the router logs for unexpected system command executions or anomalies may help detect exploitation attempts. However, no specific detection commands or signatures are provided in the resources. [1, 3]

Mitigation Strategies

Immediate mitigation steps include discontinuing the use of the affected D-Link DIR-806A 100CNb11 router since it is no longer supported by the vendor and no known countermeasures or patches exist. Isolate the device from untrusted networks to prevent remote exploitation. Consider replacing the device with a supported model that receives security updates. Additionally, restrict SSDP traffic from untrusted sources and monitor network traffic for exploitation attempts. Since no official fixes or mitigations are available, these steps are critical to reduce risk. [3]

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