CVE-2026-31851

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{"affected": [{"configurations": [{"platform": null, "status": "affected", "versions": {"scheme": "generic", "value": "[0,12.01.01.37]"}}], "enrichment": {"confidence": 100.0, "confidence_source": "manual", "scores": [{"score": 100.0, "source": "manual"}]}, "original": {"product": "Nebula 300+", "source": "cna", "vendor": "Nexxt Solutions"}, "product": "nebula300+", "vendor": "nexxtsolutions"}], "analysis": {"en": {"generated_at": "2026-03-26T12:22:05.421505+00:00", "value": {"mitigation_remediation": ["Apply the latest Nebula\u00a0300+ firmware update (version\u00a012.01.01.38 or later).", "Restrict network access to the device\u2019s authentication interfaces using ACLs or firewall rules to limit potential attackers.", "Enable multi\u2011factor authentication on administrative accounts if the firmware supports it.", "Implement external rate\u2011limiting or intrusion\u2011prevention controls to mitigate brute\u2011force attempts if updates are unavailable."], "summary": {"action": "Patch immediately", "impact": "Unrestricted brute\u2011force authentication"}, "threat_synthesis": {"affected_systems": "Known affected vendor is Nexxt Solutions, product Nebula 300+. All firmware releases up to and including version 12.01.01.37 are impacted. No other product or version information is listed. End\u2011points that use the device\u2019s credential validation services are vulnerable.", "description_and_impact": "The firmware for Nexxt Solutions Nebula 300+ up to version 12.01.01.37 lacks any mechanism to limit the number of authentication attempts or lock accounts after repeated failures, creating a brute\u2011force vulnerability. An attacker who can reach the device\u2019s credential validation endpoints can try an arbitrary number of username/password combinations, potentially discovering administrative credentials. This weakness is described by CWE\u2011307, which deals with missing or ineffective authentication rate\u2011limiting controls. The primary effect is the compromise of account confidentiality and integrity, as attackers may gain full administrative access without detection.", "risk_and_exploitability": "The CVSS score is 7.7, indicating a high risk severity. The EPSS score is below 1\u202f%, suggesting low overall exploitation likelihood in the general threat landscape, and the issue is not listed in the CISA Known Exploited Vulnerabilities catalog. The likely attack vector is a network\u2011based attempt against the device\u2019s authentication interfaces, requiring an attacker to reach the device and provide credential inputs. If successful, the attacker can obtain administrative access and control over the entire Nebula 300+ installation."}}}}, "created": "2026-03-24T10:34:36.624753+00:00", "updated": "2026-03-26T13:55:16.648260+00:00", "vendors": ["nexxtsolutions", "nexxtsolutions$PRODUCT$nebula300+"]}