D-Link DWR-M920 up to 1.1.50 /boafrm/formUSSDSetup sub_41CF20 ussdValue command injection

Summaryinfo

A vulnerability identified as critical has been detected in D-Link DWR-M920 up to 1.1.50. The impacted element is the function sub_41CF20 of the file /boafrm/formUSSDSetup. This manipulation of the argument ussdValue causes command injection. This vulnerability is handled as CVE-2026-11339. The attack can be initiated remotely. Additionally, an exploit exists.

Detailsinfo

A vulnerability was found in D-Link DWR-M920 up to 1.1.50. It has been declared as critical. Affected by this vulnerability is the function sub_41CF20 of the file /boafrm/formUSSDSetup. The manipulation of the argument ussdValue with an unknown input leads to a command injection vulnerability. The CWE definition for the vulnerability is 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. As an impact it is known to affect confidentiality, integrity, and availability.

The advisory is shared at github.com. This vulnerability is known as CVE-2026-11339. The exploitation appears to be easy. The attack can be launched remotely. Technical details and also a public exploit are known. The price for an exploit might be around USD $0-$5k at the moment (estimation calculated on 06/05/2026). MITRE ATT&CK project uses the attack technique T1202 for this issue.

It is possible to download the exploit at github.com. It is declared as proof-of-concept.

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-2026-34859). Several companies clearly confirm that VulDB is the primary source for best vulnerability data.

Productinfo

Vendor

• D-Link

Name

• DWR-M920

Version

• 1.1.0
• 1.1.1
• 1.1.2
• 1.1.3
• 1.1.4
• 1.1.5
• 1.1.6
• 1.1.7
• 1.1.8
• 1.1.9
• 1.1.10
• 1.1.11
• 1.1.12
• 1.1.13
• 1.1.14
• 1.1.15
• 1.1.16
• 1.1.17
• 1.1.18
• 1.1.19
• 1.1.20
• 1.1.21
• 1.1.22
• 1.1.23
• 1.1.24
• 1.1.25
• 1.1.26
• 1.1.27
• 1.1.28
• 1.1.29
• 1.1.30
• 1.1.31
• 1.1.32
• 1.1.33
• 1.1.34
• 1.1.35
• 1.1.36
• 1.1.37
• 1.1.38
• 1.1.39
• 1.1.40
• 1.1.41
• 1.1.42
• 1.1.43
• 1.1.44
• 1.1.45
• 1.1.46
• 1.1.47
• 1.1.48
• 1.1.49
• 1.1.50

License

• commercial

Website

• Vendor: https://www.dlink.com/

CPE 2.3info

• 🔒
• 🔒
• 🔒

CPE 2.2info

• 🔒
• 🔒
• 🔒

CVSSv4info

CVSSv3info

CVSSv2info

Exploitinginfo

Threat Intelligenceinfo

Countermeasuresinfo

Timelineinfo

Sourcesinfo

Entryinfo

Submitinfo

Accepted

• Submit #832579: D-Link DWR-M920 1.1.50 Code Injection and Buffer Overflow (by kkff33)

Several companies clearly confirm that VulDB is the primary source for best vulnerability data.

Discussion