Medium
Fleet Vulnerable to Windows MDM cross-device command disclosure
Type: advisorySources: OSV
Fleet is open source device management software. Prior to 4.81.1, a vulnerability in Fleet's Windows MDM command processing allows a malicious enrolled device to access MDM commands intended for other devices, potentially exposing sensitive configuration data such as WiFi credentials, VPN secrets, and certificate payloads across the entire Windows fleet. Version 4.81.1 patches the issue.
- Products
- Not specified
- Affected versions
- Not specified
- Fixed versions
- Not specified
- CVEs
- CVE-2026-34391
- Confirmed fixed CVEs
- Not specified
- Updated in this feed
- 4 Nov 2026, 19:29 UTC · Revision 1
Source evidence
Fleet Vulnerable to Windows MDM cross-device command disclosure
core-osv · Original sourcePublished 27 Mar 2026, 19:19 UTC
Fleet is open source device management software. Prior to 4.81.1, a vulnerability in Fleet's Windows MDM command processing allows a malicious enrolled device to access MDM commands intended for other devices, potentially exposing sensitive configuration data such as WiFi credentials, VPN secrets, and certificate payloads across the entire Windows fleet. Version 4.81.1 patches the issue.
osv:CVE-2026-34391
Complete source record
{
"id": "1e5731d384c8ddb0eef25e0cbb64fbc7d6b02b19c70390bf4cf57b7843316c32",
"url": "https://osv.dev/vulnerability/CVE-2026-34391",
"method": "structured",
"payload": {
"kind": "advisory",
"title": "Fleet Vulnerable to Windows MDM cross-device command disclosure",
"summary": "Fleet is open source device management software. Prior to 4.81.1, a vulnerability in Fleet's Windows MDM command processing allows a malicious enrolled device to access MDM commands intended for other devices, potentially exposing sensitive configuration data such as WiFi credentials, VPN secrets, and certificate payloads across the entire Windows fleet. Version 4.81.1 patches the issue.",
"evidence": "osv:CVE-2026-34391",
"products": [],
"severity": "medium",
"structured": {
"id": "CVE-2026-34391",
"aliases": [
"CVE-2026-34391",
"GHSA-wg7j-pcc3-h4rh"
],
"metrics": [
{
"type": "CVSS_V4",
"score": "CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:N/VA:N/SC:N/SI:N/SA:N/E:U"
}
],
"affected": [
{
"ranges": [
{
"repo": "https://github.com/fleetdm/fleet",
"type": "GIT",
"events": [
{
"introduced": "0"
},
{
"fixed": "729c324074c34d33e7f039991bdad05cef6c3b90"
}
],
"database_specific": {
"extracted_events": [
{
"range": [
{
"introduced": "0"
},
{
"fixed": "4.81.1"
}
],
"source": "AFFECTED_FIELD",
"strategy": "StringRangeExpression"
},
{
"cpe": "cpe:2.3:a:fleetdm:fleet:*:*:*:*:*:*:*:*",
"range": [
{
"introduced": "0"
},
{
"fixed": "4.81.1"
}
],
"source": "CPE_RANGE"
}
]
}
}
],
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],
"database_specific": {
"source": "https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-34391.json"
}
}
],
"modified": "2026-10-28T02:30:38.937430737Z",
"provider": "osv",
"references": [
"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/34xxx/CVE-2026-34391.json",
"https://github.com/fleetdm/fleet/security/advisories/GHSA-wg7j-pcc3-h4rh",
"https://nvd.nist.gov/vuln/detail/CVE-2026-34391"
],
"provider_metadata": {
"cwe_ids": [
"CWE-488"
],
"cna_assigner": "GitHub_M",
"osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/34xxx/CVE-2026-34391.json"
}
},
"related_cves": [
{
"value": "CVE-2026-34391",
"evidence": "/id"
}
],
"security_relevant": true,
"severity_evidence": "/severity/0/score"
},
"source_id": "core-osv",
"document_id": 506177,
"published_at": "2026-03-27T19:19:48.229+00:00"
}