Microsoft

CVE-2023-36899: ASP.NET Elevation of Privilege Vulnerability

Is it exploited?

Reported, not confirmed by CISA. VulnCheck KEV lists it as exploited in the wild. CISA has not added it to its Known Exploited Vulnerabilities catalog as of 29 Oct 2026.

VulnCheck KEV lists it since 31 Mar 2026. It cites 1 public report, the first from 31 Mar 2026.

fortiguard.fortinet.com

How likely is exploitation in the next 30 days?

76.7%

EPSS score, percentile 99.5 of all scored records. A probability estimated by FIRST, not a report of exploitation.

How severe?

8.8 High

CVSS v3.1 base score, given by the CNA

What should I do?

CISA has set no required action, because the vulnerability is not in KEV.

Advisories and patches (1)

Which versions are affected?

Affected

from 2.0.0 to before 2.0.50727.8974
from 4.7.0 to before 10.0.10240.20107
from 3.0.0.0 to before 10.0.14393.6167
from 4.7.0 to before 4.7.4057.05
from 4.8.0 to before 4.8.04654.06
from 4.8.1 to before 4.8.09176.01

and 3 more in the table below

Versions by product

Source: CISA KEV 2026.10.29, as of 29 Oct 2026; VulnCheck KEV, as of 30 Oct 2026; FIRST EPSS, as of 29 Oct 2026; CVE List, as of 30 Oct 2026. About the data.

Description

ASP.NET Elevation of Privilege Vulnerability

ASP.NET Elevation of Privilege Vulnerability

Source: CVE List, as of 30 Oct 2026. About the data.

What to do

Advisories and patches

ASP.NET Elevation of Privilege Vulnerability (Vendor advisory, Patch)

This summary is based on the CVE record as of 30 Oct 2026. Check the vendor's advisory before you act: affected versions and fixes can change.

Affected products and versions

Versions by product, as listed in the CVE record (9 products)

Microsoft Microsoft .NET Framework 2.0 Service Pack 2
Status	Versions
Affected	from 2.0.0 to before 2.0.50727.8974

Microsoft Microsoft .NET Framework 3.5 and 4.6.2
Status	Versions
Affected	from 4.7.0 to before 10.0.10240.20107

Microsoft Microsoft .NET Framework 3.5 AND 4.6.2/4.7/4.7.1/4.7.2
Status	Versions
Affected	from 3.0.0.0 to before 10.0.14393.6167

Microsoft Microsoft .NET Framework 3.5 AND 4.7.2
Status	Versions
Affected	from 4.7.0 to before 4.7.4057.05

Microsoft Microsoft .NET Framework 3.5 AND 4.8
Status	Versions
Affected	from 4.8.0 to before 4.8.04654.06

Microsoft Microsoft .NET Framework 3.5 AND 4.8.1
Status	Versions
Affected	from 4.8.1 to before 4.8.09176.01

Microsoft Microsoft .NET Framework 4.6.2
Status	Versions
Affected	from 4.7.0 to before 4.7.04057.05

Microsoft Microsoft .NET Framework 4.6.2/4.7/4.7.1/4.7.2
Status	Versions
Affected	from 4.7.0 to before 4.7.04057.05

Microsoft Microsoft .NET Framework 4.8
Status	Versions
Affected	from 4.8.0 to before 4.8.4654.06

Source: CVE List, as of 30 Oct 2026. About the data.

Weakness

CWE-20

CWE-20: Improper Input Validation

CWE and CAPEC are maintained by MITRE; the entries are those named in the CVE record.

Timeline

Date	Event
8 Aug 2023	CVE record published
10 Aug 2026	CVE record last updated

Known exploited Microsoft vulnerabilities

CVE-2026-96951: Microsoft Windows Command Injection Vulnerability (added 13 Oct 2026)
CVE-2026-65660: Microsoft SharePoint Code Injection Vulnerability (added 25 Sep 2026)
CVE-2026-81963: Microsoft Windows Link Following Vulnerability (added 8 Sep 2026)
CVE-2026-85880: Microsoft Windows Heap-Based Buffer Overflow Vulnerability (added 8 Sep 2026)
CVE-2019-1068: Microsoft SQL Server Remote Code Execution Vulnerability (added 26 Aug 2026)