CVE-2022-21911
mediumpriority · track · 21EPSS 0.031 · 88 %ileEUUSEPSS · scored 2026-10-27
.NET Framework Denial of Service Vulnerability
remediations
Vendor fix, mitigation, or workaround guidance, as published by each source.
A vendor fix is available.
- FixedMicrosoft .NET Framework 2.0 Service Pack 2msrc_csaf
2.0.50727.8955:Security Only:https://support.microsoft.com/help/5009714
https://support.microsoft.com/help/5009714 - FixedMicrosoft .NET Framework 3.5msrc_csaf
2.0.50727.8955:Security Only:https://support.microsoft.com/help/5009712
https://support.microsoft.com/help/5009712 - FixedMicrosoft .NET Framework 3.5 AND 4.6.2/4.7/4.7.1/4.7.2msrc_csaf
10.0.14393.4886:Security Update:https://support.microsoft.com/help/5009546
https://support.microsoft.com/help/5009546 - FixedMicrosoft .NET Framework 3.5 AND 4.7.2msrc_csaf
10.0.10240.19177:Security Update:https://support.microsoft.com/help/5009585
https://support.microsoft.com/help/5009585 - FixedMicrosoft .NET Framework 3.5 AND 4.8msrc_csaf
4.8.4465.0:Security Update:https://support.microsoft.com/help/5008876
https://support.microsoft.com/help/5008876 - FixedMicrosoft .NET Framework 3.5.1msrc_csaf
2.0.50727.8955:Security Only:https://support.microsoft.com/help/5009711
https://support.microsoft.com/help/5009711 - FixedMicrosoft .NET Framework 4.5.2msrc_csaf
4.0.30319.36720:Security Only:https://support.microsoft.com/help/5009711
https://support.microsoft.com/help/5009711 - FixedMicrosoft .NET Framework 4.6msrc_csaf
4.7.3905.0:Security Only:https://support.microsoft.com/help/5009714
https://support.microsoft.com/help/5009714 - FixedMicrosoft .NET Framework 4.6/4.6.1/4.6.2/4.7/4.7.1/4.7.2msrc_csaf
4.7.3905.0:Security Only:https://support.microsoft.com/help/5009711
https://support.microsoft.com/help/5009711 - FixedMicrosoft .NET Framework 4.8msrc_csaf
4.8.4465.0:Security Update:https://support.microsoft.com/help/5008877
https://support.microsoft.com/help/5008877
cvss
Technical severity, 0–10. One row per scoring source.
base score 0–10 · higher = more severe · hover a vector to decode⚠ sources disagree · medium–high · 5–7.5
weaknesses
The CWE weakness classes this flaw belongs to.
affected products (41)
Products and version ranges known to be affected.
- Microsoft Microsoft .NET Framework 3.5 AND 4.6.2/4.7/4.7.1/4.7.23.0.0.0 → 10.0.14393.4886enisa_euvdEU
advisories (1)
Vendor and ecosystem advisories describing this.
- msrc_CVE-2022-21911.NET Framework Denial of Service Vulnerability2022-01-11csaf · msrc_csafUS
To determine the support lifecycle for your software, see the Microsoft Support Lifecycle: https://support.microsoft.com/lifecycle
also known as (3)
Other names and identifiers for this entity.
sources
Which sources assert this record, and when.
references (8)
External citations — patches, advisories, analysis.
- https://msrc.microsoft.com/update-guide/vulnerability/CVE-2022-21911cnnvd
- https://nvd.nist.gov/vuln/detail/CVE-2022-21911cnnvd
- https://portal.msrc.microsoft.com/en-US/security-guidance/advisory/CVE-2022-21911cnnvd
- https://vigilance.fr/vulnerability/Microsoft-NET-denial-of-service-37214cnnvd
- https://www.cybersecurity-help.cz/vdb/SB2022011170cnnvd
- https://msrc.microsoft.com/update-guide/vulnerability/CVE-2022-21911enisa_euvd
- https://msrc.microsoft.com/update-guide/vulnerability/CVE-2022-21911nvd
- https://portal.msrc.microsoft.com/en-US/security-guidance/advisory/CVE-2022-21911nvd
Attackers weaponise vulnerabilities like this against internet-exposed services. See what is exposed on your perimeter with a free passive scan.
Free scan