CVE-2021-31196CISA KEV
Microsoft Exchange Server Information Disclosure Vulnerability
Severity unknownCVSS unknownCheck the vendor advisory for fixed versions
CISA lists this Microsoft vulnerability as known exploited. Its MSRC release detail is outside this installation's collected history.
CISA catalog record
Microsoft Exchange Server contains an information disclosure vulnerability that allows for remote code execution.
- Product
- Exchange Server
- Added to KEV
- 21 Aug 2024
- Federal remediation due
- 11 Sep 2024
- Known ransomware use
- Not reported
Page history
Changes are dated when recorded; day views use the last saved version from that UTC day, and citations stay fixed.
Cite this versionField-level log (2)
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- 23 Oct 2026 · 09:33:49 UTC
Source coverage: cisa-kevIncomplete → Current
- 23 Oct 2026 · 08:31:50 UTC
Source coverage: cisa-kevCurrent → Incomplete
Explore global source statements, affected packages and advisory history for CVE-2021-31196. The catalog has a separate collection scope from Microsoft release records.
More advisories, affected versions and source history
cve-program · CVE-2021-31196
PublishedMicrosoft Exchange Server 2013 Cumulative Update 23
Vendor product
Publisher's version information
Shown as published. These rules are not interpreted as NuGet package version ranges.
{
"vendor": "Microsoft",
"product": "Microsoft Exchange Server 2013 Cumulative Update 23",
"platforms": [
"x64-based Systems"
],
"versions": [
{
"version": "15.00.0",
"lessThan": "15.00.1497.023",
"versionType": "custom",
"status": "affected"
}
]
}Microsoft Exchange Server 2016 Cumulative Update 20
Vendor product
Publisher's version information
Shown as published. These rules are not interpreted as NuGet package version ranges.
{
"vendor": "Microsoft",
"product": "Microsoft Exchange Server 2016 Cumulative Update 20",
"platforms": [
"x64-based Systems"
],
"versions": [
{
"version": "15.01.0",
"lessThan": "15.01.2242.012",
"versionType": "custom",
"status": "affected"
}
]
}Microsoft Exchange Server 2016 Cumulative Update 21
Vendor product
Publisher's version information
Shown as published. These rules are not interpreted as NuGet package version ranges.
{
"vendor": "Microsoft",
"product": "Microsoft Exchange Server 2016 Cumulative Update 21",
"platforms": [
"x64-based Systems"
],
"versions": [
{
"version": "15.01.0",
"lessThan": "15.01.2308.014",
"versionType": "custom",
"status": "affected"
}
]
}Microsoft Exchange Server 2019 Cumulative Update 10
Vendor product
Publisher's version information
Shown as published. These rules are not interpreted as NuGet package version ranges.
{
"vendor": "Microsoft",
"product": "Microsoft Exchange Server 2019 Cumulative Update 10",
"platforms": [
"x64-based Systems"
],
"versions": [
{
"version": "15.02.0",
"lessThan": "15.02.0922.013",
"versionType": "custom",
"status": "affected"
}
]
}Microsoft Exchange Server 2019 Cumulative Update 9
Vendor product
Publisher's version information
Shown as published. These rules are not interpreted as NuGet package version ranges.
{
"vendor": "Microsoft",
"product": "Microsoft Exchange Server 2019 Cumulative Update 9",
"platforms": [
"x64-based Systems"
],
"versions": [
{
"version": "15.02.0",
"lessThan": "15.02.0858.015",
"versionType": "custom",
"status": "affected"
}
]
}Original source record · Cite this exact observation · Complete original publisher JSON