CVE-2026-45459
Microsoft Excel Security Feature Bypass Vulnerability
Protection mechanism failure in Microsoft Office Excel allows an unauthorized attacker to bypass a security feature locally.
Attack profile
How easy it is to exploit
- Attack vector
- Local
- Complexity
- Low
- Privileges needed
- None
- User interaction
- Required
What an attacker can affect
- Confidentiality
- Low
- Integrity
- None
- Availability
- None
Exploit likelihood
What each source reports
CVE List Score used
Microsoft Excel Security Feature Bypass Vulnerability
Protection mechanism failure in Microsoft Office Excel allows an unauthorized attacker to bypass a security feature locally.
- Record
CVE-2026-45459- CVSS 3.1
- 3.3 Low
CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:L/I:N/A:N/E:U/RL:O/RC:C - Weakness
- CWE-693
- Updated
- 2026-11-11
EUVDEUVD-2026-35541
Protection mechanism failure in Microsoft Office Excel allows an unauthorized attacker to bypass a security feature locally.
- Record
EUVD-2026-35541- CVSS 3.1
- 3.3 Low
CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:L/I:N/A:N/E:U/RL:O/RC:C - Updated
- 2026-11-11
GitHub AdvisoriesGHSA-chvc-7qm7-3qgf
Protection mechanism failure in Microsoft Office Excel allows an unauthorized attacker to bypass...
Protection mechanism failure in Microsoft Office Excel allows an unauthorized attacker to bypass a security feature locally.
- Record
GHSA-chvc-7qm7-3qgf- CVSS 3.1
- 3.3 Low
CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:L/I:N/A:N - Weakness
- CWE-693
- Updated
- 2026-11-02
NVD
Protection mechanism failure in Microsoft Office Excel allows an unauthorized attacker to bypass a security feature locally.
- Record
CVE-2026-45459- CVSS 3.1
- 3.3 Low
CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:L/I:N/A:N - Weakness
- CWE-693
- Updated
- 2026-11-02
Affected products
History
| Recorded | Changed | Sources |
|---|---|---|
| facts | EUVD | |
| first indexed | CVE List, EUVD, GitHub Advisories, NVD |
Dates are when Every CVE recorded each change. Upstream dates may differ.
In short
CVE-2026-45459 is a low vulnerability (CVSS 3.3) in Microsoft 365 Apps, published June 9, 2026. No source lists public exploit code. EPSS puts the chance of exploitation in the next 30 days at 0.37%, the 31st percentile. No source names a fixed version.