CVE-2026-21259 PUBLISHED CVSS 7.800000190734863 HIGH

Heap-based buffer overflow in Microsoft Office Excel allows an unauthorized attacker to elevate privileges locally.

EPSS 0.03% · 7.4th percentile

Risk Scores

CVSS v3.1
7.800000190734863
CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H/E:U/RL:O/RC:C
EPSS Score
0.03%
7.4th percentile

Affected Products

VendorProductVersions
microsoftoffice_online_server0, 0, 0
microsoftoffice_202116.0.0.0, 16.0.0.0, 16.0.1
microsoftoffice2019, 2019, 2019
MicrosoftMicrosoft 365 Apps for Enterprise16.0.1, 16.0.1
microsoftoffice_201919.0.0, 19.0.0
MicrosoftMicrosoft Excel 201616.0.0.0, 16.0.0.0
microsoftoffice_202416.0.0, 16.0.0
microsoft365_apps16.0.1, 16.0.1
microsoftexcel2016, 2016, 2016
MicrosoftMicrosoft Office LTSC 202416.0.0, 16.0.0
microsoftoffice_long_term_servicing_channel2024, 2021, 2021
MicrosoftOffice Online Server16.0.0.0, 16.0.0.0
microsoftexcel_201616.0.0.0, 16.0.0.0
MicrosoftMicrosoft Office LTSC 202116.0.1, 16.0.1
MicrosoftMicrosoft Office 201919.0.0, 19.0.0

Timeline

References

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