CVE-2026-31846
MediumCVSS 6.5Exploitation Probability (EPSS)
Low risk16th percentile - higher than 16% of all known CVEs
Summary
Missing authentication in the /goform/ate endpoint in Nexxt Solutions Nebula 300+ firmware through version 12.01.01.37 allows an adjacent unauthenticated attacker to retrieve sensitive device information, including the administrator password. An attacker can decode this value to obtain valid administrative credentials and authenticate to the device.
Risk Assessment
The risk includes full device takeover by an unauthenticated attacker within network range, potentially leading to confidentiality and integrity breaches.
Recommendation
It is recommended to immediately update the firmware to a version newer than 12.01.01.37 and restrict access to the /goform/ate endpoint using a network firewall.
Other vulnerabilities in Nexxt Solutions Nebula 300+
See all- CVE-2026-31848Critical
Nexxt Solutions Nebula 300+ firmware through version 12.01.01.37 uses the ecos_pw cookie for authentication, which contains Base64-encoded credential data combined with a static suffix. Because the encoding is reversible and lacks integrity protection, an attacker can reconstruct or forge a valid cookie value without proper authentication.
- CVE-2026-31847High
Hidden functionality in the /goform/setSysTools endpoint in Nexxt Solutions Nebula 300+ firmware up to version 12.01.01.37 allows remote enablement of a Telnet service. An authenticated attacker can send a crafted POST request with parameters such as telnetManageEn=true and telnetPwd to activate Telnet on port 23.
Original NVD description (English source)
Missing authentication in the /goform/ate endpoint in Nexxt Solutions Nebula 300+ firmware through version 12.01.01.37 allows an adjacent unauthenticated attacker to retrieve sensitive device information, including the administrator password. An attacker can decode this value to obtain valid administrative credentials and authenticate to the device.