CVE-2026-34391

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{}

{"affected": [{"configurations": [{"platform": null, "status": "affected", "versions": {"scheme": "semver", "value": "[0,4.81.1)"}}], "enrichment": {"confidence": 100.0, "confidence_source": "matching", "scores": [{"score": 100.0, "source": "matching"}]}, "original": {"product": "fleet", "source": "cna", "vendor": "fleetdm"}, "product": "fleet", "vendor": "fleetdm"}], "analysis": {"en": {"generated_at": "2026-04-02T22:44:17.750781+00:00", "value": {"mitigation_remediation": ["Upgrade Fleet to version\u202f4.81.1 or later", "Ensure all Windows fleet devices run the updated Fleet version", "Review MDM logs for anomalous command requests"], "summary": {"action": "Patch immediately", "impact": "Sensitive data disclosure"}, "threat_synthesis": {"affected_systems": "The issue affects Fleet deployments of any version earlier than 4.81.1, impacting all Windows endpoints managed by Fleet on those installations. The vendor identifies the problem as CWE\u2011488, Information Exposure After Error.", "description_and_impact": "Fleet, an open\u2011source device\u2011management platform, contains a flaw in its Windows MDM command processor that permits a malicious device enrolled in a fleet to read commands meant for other devices. The result is an unauthorized disclosure of sensitive configuration information\u2014including Wi\u2011Fi credentials, VPN secrets, and certificate payloads\u2014across the entire Windows fleet.", "risk_and_exploitability": "The vulnerability is scored 6.6 on CVSS, indicating moderate severity, and has an EPSS score of less than 1\u202f%, suggesting low exploitation probability. It is not listed in CISA\u2019s KEV catalog. Exploitation requires control over an enrolled device, meaning the attack vector is internal; an attacker would need to enroll a device that can query the MDM command service and obtain data for other devices. Because no public exploit is documented, the risk is lower than for publicly exploited flaws, but the potential for hidden data leakage across a fleet remains significant if an attacker gains device foothold."}}}}, "created": "2026-03-27T20:27:36.369075+00:00", "updated": "2026-04-03T09:38:34.655312+00:00", "vendors": ["fleetdm", "fleetdm$PRODUCT$fleet"]}