How severe is CVE-2026-45490?

CVE-2026-45490 has a CVSS 3.x base score of 7.8, rated high severity. It is exploitable over local access with low attack complexity, requires low privileges and no user interaction. Impact on confidentiality is high, integrity high, and availability high.

Is CVE-2026-45490 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (30th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2026-45490?

CVE-2026-45490 affects Microsoft .net. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2026-45490?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its high severity, prioritise patching exposed systems.

Does CVE-2026-45490 have an EU (EUVD) identifier?

Yes. CVE-2026-45490 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2026-35674.

When was CVE-2026-45490 published?

CVE-2026-45490 was published on 2026-06-09 and last updated on 2026-06-30.

CVE-2026-45490

CVE-2026-45490 is a high-severity vulnerability in Microsoft .net with a CVSS 3.x base score of 7.8. It is not currently listed as actively exploited by CISA, and its EPSS exploit-prediction score is low. The underlying weakness is classified as CWE-285.

Key facts

Severity: High (CVSS 3.x base score 7.8)
EPSS exploit prediction: 0% (30th percentile)
Actively exploited: Not listed in CISA KEV
EU (EUVD) id: EUVD-2026-35674
Weakness: CWE-285
Affected product: Microsoft .net
Published: 2026-06-09
Last modified: 2026-06-30

Description

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

Frequently asked questions

What is CVE-2026-45490?: Improper authorization in .NET allows an authorized attacker to elevate privileges locally.
How severe is CVE-2026-45490?: CVE-2026-45490 has a CVSS 3.x base score of 7.8, rated high severity. It is exploitable over local access with low attack complexity, requires low privileges and no user interaction. Impact on confidentiality is high, integrity high, and availability high.
Is CVE-2026-45490 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (30th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2026-45490?: CVE-2026-45490 affects Microsoft .net. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2026-45490?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its high severity, prioritise patching exposed systems.
Does CVE-2026-45490 have an EU (EUVD) identifier?: Yes. CVE-2026-45490 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2026-35674.
When was CVE-2026-45490 published?: CVE-2026-45490 was published on 2026-06-09 and last updated on 2026-06-30.

References

Affected products (1)

cpe:2.3:a:microsoft:.net:*:*:*:*:*:*:*:*

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