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Description

Integer overflow or wraparound in Microsoft Office allows an unauthorized attacker to disclose information locally.

PUBLISHED Reserved 2026-06-16 | Published 2026-07-14 | Updated 2026-07-14 | Assigner microsoft




MEDIUM: 6.2CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N/E:U/RL:O/RC:C

Problem types

CWE-190: Integer Overflow or Wraparound

Product status

16.0.1 (custom) before https://aka.ms/OfficeSecurityReleases
affected

16.0.0 (custom) before 16.0.5561.1000
affected

19.0.0 (custom) before https://aka.ms/OfficeSecurityReleases
affected

1.0.0 (custom) before 16.111.26071215
affected

16.0.1 (custom) before https://aka.ms/OfficeSecurityReleases
affected

16.0.0 (custom) before https://aka.ms/OfficeSecurityReleases
affected

16.0.1 (custom) before 16.111.26071215
affected

16.0.0 (custom) before 16.111.26071215
affected

16.0.0 (custom) before 16.0.5561.1001
affected

16.0.0 (custom) before 16.0.10417.20175
affected

16.0.0 (custom) before 16.0.19725.20434
affected

References

msrc.microsoft.com/update-guide/vulnerability/CVE-2026-55026 (Microsoft Office Information Disclosure Vulnerability) vendor-advisory patch

cve.org (CVE-2026-55026)

nvd.nist.gov (CVE-2026-55026)

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