How severe is CVE-2026-35433?

CVE-2026-35433 has a CVSS 3.x base score of 7.3, rated high severity. It is exploitable over local access with low attack complexity, requires no privileges and user interaction. Impact on confidentiality is high, integrity high, and availability low.

Is CVE-2026-35433 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (47th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2026-35433?

CVE-2026-35433 primarily affects Microsoft .net Framework. In total, 5 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.

How do I fix CVE-2026-35433?

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-2026-35433 have an EU (EUVD) identifier?

Yes. CVE-2026-35433 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2026-29634.

When was CVE-2026-35433 published?

CVE-2026-35433 was published on 2026-05-12 and last updated on 2026-06-30.

CVE-2026-35433

CVE-2026-35433 is a high-severity vulnerability in Microsoft .net Framework with a CVSS 3.x base score of 7.3. 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-20.

Key facts

Severity: High (CVSS 3.x base score 7.3)
EPSS exploit prediction: 1% (47th percentile)
Actively exploited: Not listed in CISA KEV
EU (EUVD) id: EUVD-2026-29634
Weakness: CWE-20
Affected product: Microsoft .net Framework
Published: 2026-05-12
Last modified: 2026-06-30

Description

Improper input validation in .NET allows an unauthorized attacker to elevate privileges locally.

Frequently asked questions

What is CVE-2026-35433?: Improper input validation in .NET allows an unauthorized attacker to elevate privileges locally.
How severe is CVE-2026-35433?: CVE-2026-35433 has a CVSS 3.x base score of 7.3, rated high severity. It is exploitable over local access with low attack complexity, requires no privileges and user interaction. Impact on confidentiality is high, integrity high, and availability low.
Is CVE-2026-35433 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (47th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2026-35433?: CVE-2026-35433 primarily affects Microsoft .net Framework. In total, 5 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.
How do I fix CVE-2026-35433?: 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-2026-35433 have an EU (EUVD) identifier?: Yes. CVE-2026-35433 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2026-29634.
When was CVE-2026-35433 published?: CVE-2026-35433 was published on 2026-05-12 and last updated on 2026-06-30.

References

Affected products (5)

cpe:2.3:a:microsoft:.net_framework:4.8:*:*:*:*:*:*:*
cpe:2.3:a:microsoft:.net_framework:3.5:*:*:*:*:*:*:*
cpe:2.3:a:microsoft:.net:*:*:*:*:*:*:*:*
cpe:2.3:a:microsoft:.net_framework:4.8.1:*:*:*:*:*:*:*
cpe:2.3:a:microsoft:.net_framework:4.7.2:*:*:*:*:*:*:*

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