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Vulnerability details

CVE-2026-45490

Microsoft NET

.NET SDK Elevation of Privilege Vulnerability

CVSS 3.1

7.8High

Official description

Improper authorization in .NET allows an authorized attacker to elevate privileges locally.

CVSS scores

Score	Version	Source	Vector
7.8High	3.1	CVEProject cvelistV5 (CNA) (microsoft)	`CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H/E:U/RL:O/RC:C`
7.8High	3.1	CVEProject cvelistV5 (CNA) (redhat-SADP)	`CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H`

Affected products

Vendor	Product	Versions	Source
Microsoft	.NET 10.0	10.0.0 ≤ v < 10.0.9	CVEProject cvelistV5 (CNA)
Microsoft	.NET 8.0	8.0.0 ≤ v < 8.0.28	CVEProject cvelistV5 (CNA)
Microsoft	.NET 9.0	9.0.0 ≤ v < 9.0.17	CVEProject cvelistV5 (CNA)

References and advisories

4

https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-45490 vendor-advisorypatch
https://access.redhat.com/security/cve/CVE-2026-45490 vdb-entryx_refsource_REDHAT
https://bugzilla.redhat.com/show_bug.cgi?id=2487184 issue-trackingx_refsource_REDHAT
https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-45490.json x_sadp-csaf-vex

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Details

Published: 2026-06-09
Last updated: 2026-09-24
State: Published
Assigner (CNA): microsoft

Exploit prediction (EPSS)

0.38%

Probability of exploitation in 30 days

32.6%

Percentile (among all CVEs)

SSVC assessment (CISA)

Automatable: No
Exploitation: None
Technical impact: Total

Weaknesses (CWE)

CWE-285
Improper Authorization
CWE-266
Incorrect Privilege Assignment