CVE-2026-31849 Missing CSRF Protection on Administrative Endpoints in Nexxt Nebula 300+
Attackers can force authenticated administrators to execute unauthorized configuration changes via crafted web requests due to missing CSRF protections.
- Exploited in the wild
- Not known
- Login needed
- Not needed
- Attackable
- Over the internet
- Victim action needed
- A user has to click or open something
- Fix
- None listed
What is CVE-2026-31849?
CVE-2026-31849 is a high-severity vulnerability in Nexxt Solutions Nebula 300+, published on 23 Mar 2026. An attacker can exploit it over the internet without logging in, and only if a user opens a file or follows a link.
Official description
Nexxt Solutions Nebula 300+ firmware through version 12.01.01.37 does not implement CSRF protections on state-changing endpoints such as /goform/setSysTools and other administrative interfaces. As a result, an attacker can craft malicious web requests that are executed in the context of an authenticated administrator’s browser, leading to unauthorized configuration changes, including enabling services or modifying system settings.
Weakness: CWE-352
Which versions are affected by CVE-2026-31849?
It affects 1 product.
Products include Nexxtsolutions Nebula300plus Firmware.
How do I fix CVE-2026-31849?
No fix has been published for CVE-2026-31849 yet. Limit exposure of the affected software until one is available.
Is CVE-2026-31849 being exploited?
There is no known exploitation of CVE-2026-31849 in the wild and no public exploit code.
Other vulnerabilities in Nexxt Solutions Nebula 300+
- CVE-2026-31848 Reversible ecos_pw Cookie Allows Authentication Bypass in Nexxt Nebula 300+
- CVE-2026-31847 Hidden Functionality Enables Remote Telnet Activation via /goform/setSysTools in Nexxt Nebula 300+
- CVE-2026-31851 Nexxt Nebula 300+ - Lack of Rate Limiting Enables Brute-Force Attacks
- CVE-2026-31850 Plaintext Storage of Credentials in Configuration Backup in Nexxt Nebula 300+
Sources
Also known as GHSA-fgpp-3hfm-jqqh.