PT-2026-47946 · Microsoft · Office Excel

CVE-2026-45459 · Published 2026-06-09 · Updated 2026-06-19

Positive Technologies (AI Summary)

CVSS v3.1

3.3

Low

Base vector

AV:L/AC:L/PR:N/UI:R/S:U/C:L/I:N/A:N

Name of the Vulnerable Software and Affected Versions Microsoft Office Excel (affected versions not specified)

Description A protection mechanism failure in Microsoft Office Excel allows an unauthorized attacker to bypass a security feature locally.

Recommendations At the moment, there is no information about a newer version that contains a fix for this vulnerability.

Protection Mechanism Failure

Weakness Enumeration

CWE-693

Related Identifiers

BDU:2026-08326

CVE-2026-45459

Affected Products

Office Excel

References · 4

• https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-45459 · Vendor Advisory
• https://bdu.fstec.ru/vul/2026-08326 · Security Note
• https://nvd.nist.gov/vuln/detail/CVE-2026-45459 · Security Note
• https://t.me/cveNotify/171212 · Telegram Post