Unauthorized configuration changes via forged administrative requests
Published Mar 23, 2026 · Updated Mar 23, 2026
Cross-site request forgery in Nexxt Solutions Nebula 300+ firmware 12.01.01.37 and earlier allows remote attackers to alter router settings. The /goform/setSysTools handler and other administrative endpoints accept state-changing browser requests without verifying their intended origin. Exploitation requires an authenticated administrator to load attacker-controlled content, which can enable services or modify system settings.
Summary
What happened
Cross-site request forgery in Nexxt Solutions Nebula 300+ firmware 12.01.01.37 and earlier allows remote attackers to alter router settings. The /goform/setSysTools handler and other administrative endpoints accept state-changing browser requests without verifying their intended origin. Exploitation requires an authenticated administrator to load attacker-controlled content, which can enable services or modify system settings.
The record
- CVE
- CVE-2026-31849
- Published
- Mar 23, 2026
- Updated
- Mar 23, 2026
- Vendor
- Nexxt Solutions
- Product
- Nebula 300+
- Classifications
- CWE-352, T1565.001
- Attack vector
- network
- Privileges
- unauthenticated
Timeline
How it unfolded
- Mar 23, 2026CVE publishedPublication date reported by the CVE source.
- Mar 23, 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=<= 12.01.01.37
What conditions does exploitation require?
What is affected?
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
No public exploit references are available in this record.
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
Check the software in your environment
Book a demo to see how Hinoki identifies affected software and validates exploitability in your environment.
Book a demo