CVE-2026-62911
🗓️ 11 Aug 2026 17:06:27Reported by microsoftType 
cve🔗 web.nvd.nist.gov📰️ 11 Media mentions👁 775 Views🌐 WEB
10
Node
OR
[
{
"vendor": "Microsoft",
"product": "Microsoft Exchange Server 2016 Cumulative Update 23",
"platforms": [
"x64-based Systems"
],
"versions": [
{
"version": "15.01.0.0",
"lessThan": "15.01.2507.072",
"versionType": "custom",
"status": "affected"
}
]
},
{
"vendor": "Microsoft",
"product": "Microsoft Exchange Server 2019 Cumulative Update 14",
"platforms": [
"x64-based Systems"
],
"versions": [
{
"version": "15.02.0.0",
"lessThan": "15.02.1544.044",
"versionType": "custom",
"status": "affected"
}
]
},
{
"vendor": "Microsoft",
"product": "Microsoft Exchange Server 2019 Cumulative Update 15",
"platforms": [
"x64-based Systems"
],
"versions": [
{
"version": "15.02.0.0",
"lessThan": "15.02.1748.049",
"versionType": "custom",
"status": "affected"
}
]
},
{
"vendor": "Microsoft",
"product": "Microsoft Exchange Server Subscription Edition RTM",
"platforms": [
"x64-based Systems"
],
"versions": [
{
"version": "15.02.0.0",
"lessThan": "15.02.2562.046",
"versionType": "custom",
"status": "affected"
}
]
}
]| Parameter | Position | Path | Description | CWE |
|---|---|---|---|---|
| Negotiate auth without channel bindings (EPA) check | path | /Microsoft.Exchange.MailboxReplicationService.ProxyService | Pre-auth relay to MRSProxy via HTTP.sys without EPA binding checks allows NTLM relay to Exchange as machine account. | CWE-294 |
| Negotiate auth without channel bindings (EPA) check | path | /EWS/MRSProxy.svc | Pre-auth relay to MRSProxy via HTTP.sys without EPA binding checks allows NTLM relay to Exchange as machine account. | CWE-294 |
| filePath | request body | /Microsoft.Exchange.MailboxReplicationService.ProxyService | Attacker-controlled filePath parameter in IMailbox_Config6 enables arbitrary file writes via IMailbox_Connect (no validation). | CWE-294 |
10
Data
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08 Oct 2026 18:12Current
7.4High risk
Vulners AI Score7.4
CVSS 3.18
EPSS0.00694
SSVC