How severe is CVE-2026-35436?

CVE-2026-35436 has a CVSS 3.x base score of 8.8, 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-2026-35436 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (12th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2026-35436?

CVE-2026-35436 primarily affects Microsoft 365 Apps. In total, 8 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.

How do I fix CVE-2026-35436?

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-2026-35436 have an EU (EUVD) identifier?

Yes. CVE-2026-35436 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2026-29635.

When was CVE-2026-35436 published?

CVE-2026-35436 was published on 2026-05-12 and last updated on 2026-06-17.

CVE-2026-35436

CVE-2026-35436 is a high-severity vulnerability in Microsoft 365 Apps with a CVSS 3.x base score of 8.8. 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-1220.

Key facts

Severity: High (CVSS 3.x base score 8.8)
EPSS exploit prediction: 0% (12th percentile)
Actively exploited: Not listed in CISA KEV
EU (EUVD) id: EUVD-2026-29635
Weakness: CWE-1220
Affected product: Microsoft 365 Apps
Published: 2026-05-12
Last modified: 2026-06-17

Description

Use after free in Microsoft Office allows an authorized attacker to elevate privileges locally.

Frequently asked questions

What is CVE-2026-35436?: Use after free in Microsoft Office allows an authorized attacker to elevate privileges locally.
How severe is CVE-2026-35436?: CVE-2026-35436 has a CVSS 3.x base score of 8.8, 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-2026-35436 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (12th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2026-35436?: CVE-2026-35436 primarily affects Microsoft 365 Apps. In total, 8 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.
How do I fix CVE-2026-35436?: 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-2026-35436 have an EU (EUVD) identifier?: Yes. CVE-2026-35436 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2026-29635.
When was CVE-2026-35436 published?: CVE-2026-35436 was published on 2026-05-12 and last updated on 2026-06-17.

References

https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-35436

Affected products (8)

cpe:2.3:a:microsoft:365_apps:-:*:*:*:enterprise:*:x64:*
cpe:2.3:a:microsoft:365_apps:-:*:*:*:enterprise:*:x86:*
cpe:2.3:a:microsoft:office:2019:*:*:*:*:*:x64:*
cpe:2.3:a:microsoft:office:2019:*:*:*:*:*:x86:*
cpe:2.3:a:microsoft:office_long_term_servicing_channel:2021:*:*:*:*:-:x64:*
cpe:2.3:a:microsoft:office_long_term_servicing_channel:2021:*:*:*:*:-:x86:*
cpe:2.3:a:microsoft:office_long_term_servicing_channel:2024:*:*:*:*:-:x64:*
cpe:2.3:a:microsoft:office_long_term_servicing_channel:2024:*:*:*:*:-:x86:*

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