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CVE-2026-45490

31
FAUCET Score

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

First published: Jun 9, 2026Last modified: Jun 9, 2026

Impacted Technologies

VendorProductVersion(s)CPE
>= 8.0.0, < 8.0.28CPE matchmatch criteria
cpe:2.3:a:microsoft:.net:*:*:*:*:*:*:*:*
>= 9.0.0, < 9.0.17CPE matchmatch criteria
cpe:2.3:a:microsoft:.net:*:*:*:*:*:*:*:*
>= 10.0.0, < 10.0.9CPE matchmatch criteria
cpe:2.3:a:microsoft:.net:*:*:*:*:*:*:*:*

CVSS Data

CVSS version used by this source: 3.1

7.8HIGH

CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

Attack Vector
LOCAL
Attack Complexity
LOW
Privileges Required
LOW
User Interaction
NONE
Scope
UNCHANGED
Confidentiality Impact
HIGH
Integrity Impact
HIGH
Availability Impact
HIGH
Exploitability Score
1.8
Impact Score
5.9
CvssVersion
3.1

Exploit Intelligence

EPSS Score
0.38%
Probability of exploitation in next 30 days
EPSS Percentile
31.0%
Percentile rank of EPSS score among Peer Group
As of 2026-07-27
Model: v2026.06.15
This CVE's current EPSS score of 0.0038 is in the 70th percentile among its peer group of 17,070 CVEs.

Social Chatter

The average CVE in this peer group has 0.0 Twitter, 0.1 Reddit, 0.2 Bluesky, 0.1 Mastodon, and 0.2 GitHub mentions.

Media Mentions

The average CVE in this peer group has 0.3 InfoSec Media, 0.0 Vendor Blog, and 0.0 Security Researcher mentions.

Remediation

Patch Available

Vendor Patches (3)

microsoftpatch availablevia msrc
Product: .NET 10.0 installed on WindowsFixed in: 10.0.9
View patch
microsoftpatch availablevia msrc
Product: .NET 8.0 installed on WindowsFixed in: 8.0.28
View patch
microsoftpatch availablevia msrc
Product: .NET 9.0 installed on WindowsFixed in: 9.0.17
View patch

Vendor Advisories (1)

microsoft2026-Jun/CVE-2026-45490Important

.NET SDK Elevation of Privilege Vulnerability

Jun 9, 2026

References

access.redhat.com / security/cve/CVE-2026-45490
bugzilla.redhat.com / show_bug.cgi
security.access.redhat.com / data/csaf/v2/vex/2026/cve-2026-45490.json
msrc.microsoft.com / update-guide/vulnerability/CVE-2026-45490
Vendor Advisory