How severe is CVE-2026-42832?

CVE-2026-42832 has a CVSS 3.x base score of 7.7, rated high severity. It is exploitable over local access with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is high, integrity high, and availability none.

Is CVE-2026-42832 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (13th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2026-42832?

CVE-2026-42832 primarily affects Microsoft Excel. In total, 4 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.

How do I fix CVE-2026-42832?

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-2026-42832 have an EU (EUVD) identifier?

Yes. CVE-2026-42832 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2026-29712.

When was CVE-2026-42832 published?

CVE-2026-42832 was published on 2026-05-12 and last updated on 2026-06-17.

CVE-2026-42832

CVE-2026-42832 is a high-severity vulnerability in Microsoft Excel with a CVSS 3.x base score of 7.7. 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-284.

Key facts

Severity: High (CVSS 3.x base score 7.7)
EPSS exploit prediction: 0% (13th percentile)
Actively exploited: Not listed in CISA KEV
EU (EUVD) id: EUVD-2026-29712
Weakness: CWE-284
Affected product: Microsoft Excel
Published: 2026-05-12
Last modified: 2026-06-17

Description

Improper access control in Microsoft Office allows an unauthorized attacker to perform spoofing locally.

Frequently asked questions

What is CVE-2026-42832?: Improper access control in Microsoft Office allows an unauthorized attacker to perform spoofing locally.
How severe is CVE-2026-42832?: CVE-2026-42832 has a CVSS 3.x base score of 7.7, rated high severity. It is exploitable over local access with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is high, integrity high, and availability none.
Is CVE-2026-42832 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (13th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2026-42832?: CVE-2026-42832 primarily affects Microsoft Excel. In total, 4 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.
How do I fix CVE-2026-42832?: 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-2026-42832 have an EU (EUVD) identifier?: Yes. CVE-2026-42832 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2026-29712.
When was CVE-2026-42832 published?: CVE-2026-42832 was published on 2026-05-12 and last updated on 2026-06-17.

References

https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-42832

Affected products (4)

cpe:2.3:a:microsoft:excel:*:*:*:*:*:android:*:*
cpe:2.3:a:microsoft:office:2024:*:*:*:ltsc:macos:*:*
cpe:2.3:a:microsoft:office_long_term_servicing_channel:2021:*:*:*:*:macos:*:*
cpe:2.3:a:microsoft:word:*:*:*:*:*:android:*:*

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