Authenticated command execution via unsanitized USSD input
Published Jun 5, 2026 · Updated Jun 5, 2026
Command injection in D-Link DWR-M920 1.1.0 through 1.1.50 allows remote authenticated users to execute shell commands via ussdValue. In sub_41CF20 at /boafrm/formUSSDSetup, sprintf inserts ussdValue without sanitization or a length check into an AT-command string that sub_41CDBC sends to system(). A valid web-management session is required; successful exploitation can read operating-system data and modify files in the router's execution context.
Summary
What happened
Command injection in D-Link DWR-M920 1.1.0 through 1.1.50 allows remote authenticated users to execute shell commands via ussdValue. In sub_41CF20 at /boafrm/formUSSDSetup, sprintf inserts ussdValue without sanitization or a length check into an AT-command string that sub_41CDBC sends to system(). A valid web-management session is required; successful exploitation can read operating-system data and modify files in the router's execution context.
The record
- CVE
- CVE-2026-11339
- Published
- Jun 5, 2026
- Updated
- Jun 5, 2026
- Vendor
- D-Link
- Product
- DWR-M920
- Classifications
- CWE-77, CWE-74, T1059.004
- Attack vector
- network
- Privileges
- authenticated
Timeline
How it unfolded
- Jun 5, 2026CVE publishedPublication date reported by the CVE source.
- Jun 5, 2026Record updatedLatest update available in the CVE record.
Exploitability
Present is not the same as exploitable
Compare your product and version with the public record. A matching version still requires validation against your environment.
Is a vulnerable build present?
Compare these published version ranges with your installed build and any vendor patches.
- Affected versionversion=1.1.0
- Affected versionversion=1.1.1
- Affected versionversion=1.1.10
- Affected versionversion=1.1.11
- Affected versionversion=1.1.12
- Affected versionversion=1.1.13
- Affected versionversion=1.1.14
- Affected versionversion=1.1.15
- Affected versionversion=1.1.16
- Affected versionversion=1.1.17
- Affected versionversion=1.1.18
- Affected versionversion=1.1.19
- Affected versionversion=1.1.2
- Affected versionversion=1.1.20
- Affected versionversion=1.1.21
- Affected versionversion=1.1.22
- Affected versionversion=1.1.23
- Affected versionversion=1.1.24
- Affected versionversion=1.1.25
- Affected versionversion=1.1.26
- Affected versionversion=1.1.27
- Affected versionversion=1.1.28
- Affected versionversion=1.1.29
- Affected versionversion=1.1.3
- Affected versionversion=1.1.30
- Affected versionversion=1.1.31
- Affected versionversion=1.1.32
- Affected versionversion=1.1.33
- Affected versionversion=1.1.34
- Affected versionversion=1.1.35
- Affected versionversion=1.1.36
- Affected versionversion=1.1.37
- Affected versionversion=1.1.38
- Affected versionversion=1.1.39
- Affected versionversion=1.1.4
- Affected versionversion=1.1.40
- Affected versionversion=1.1.41
- Affected versionversion=1.1.42
- Affected versionversion=1.1.43
- Affected versionversion=1.1.44
- Affected versionversion=1.1.45
- Affected versionversion=1.1.46
- Affected versionversion=1.1.47
- Affected versionversion=1.1.48
- Affected versionversion=1.1.49
- Affected versionversion=1.1.5
- Affected versionversion=1.1.50
- Affected versionversion=1.1.6
- Affected versionversion=1.1.7
- Affected versionversion=1.1.8
- Affected versionversion=1.1.9
What conditions does exploitation require?
What is affected?
Published CVSS scores
CVSS describes severity. EPSS estimates exploitation probability.
Attacks
What attackers are doing with it
Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.
Weakness, pattern, technique
Public exploit references
- DWR-M920 formUSSDSetup command-injection proof of conceptproof of concept · demonstrated
Labels summarize the accepted research assessment. They do not indicate a test against your environment.
Technologies
Your stack
See the directory against your own environment.
Your stack
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