How severe is CVE-2026-45649?

CVE-2026-45649 has a CVSS 3.x base score of 7.1, 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 none.

Is CVE-2026-45649 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (34th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2026-45649?

CVE-2026-45649 primarily affects Microsoft Excel. In total, 3 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.

How do I fix CVE-2026-45649?

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-2026-45649 have an EU (EUVD) identifier?

Yes. CVE-2026-45649 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2026-35693.

When was CVE-2026-45649 published?

CVE-2026-45649 was published on 2026-06-09 and last updated on 2026-06-19.

CVE-2026-45649

CVE-2026-45649 is a high-severity vulnerability in Microsoft Excel with a CVSS 3.x base score of 7.1. 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 7.1)
EPSS exploit prediction: 0% (34th percentile)
Actively exploited: Not listed in CISA KEV
EU (EUVD) id: EUVD-2026-35693
Weakness: CWE-284
Affected product: Microsoft Excel
Published: 2026-06-09
Last modified: 2026-06-19

Description

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

Frequently asked questions

What is CVE-2026-45649?: Improper access control in Office for Android allows an unauthorized attacker to perform spoofing locally.
How severe is CVE-2026-45649?: CVE-2026-45649 has a CVSS 3.x base score of 7.1, 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 none.
Is CVE-2026-45649 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (34th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2026-45649?: CVE-2026-45649 primarily affects Microsoft Excel. In total, 3 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.
How do I fix CVE-2026-45649?: 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-2026-45649 have an EU (EUVD) identifier?: Yes. CVE-2026-45649 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2026-35693.
When was CVE-2026-45649 published?: CVE-2026-45649 was published on 2026-06-09 and last updated on 2026-06-19.

References

https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-45649

Affected products (3)

cpe:2.3:a:microsoft:excel:-:*:*:*:*:android:*:*
cpe:2.3:a:microsoft:powerpoint:-:*:*:*:*:android:*:*
cpe:2.3:a:microsoft:word:-:*:*:*:*:android:*:*

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