Back to CVE records
Medium 5.5Published Jul 14, 2026
CVE-2026-55046Microsoft Excel Information Disclosure Vulnerability
Updated under an hour ago ()
Does this affect you?
It affects Microsoft 365 Apps for Enterprise and 13 other products. Add what you run to find out whether that includes you.
No exploitation reported and no EPSS estimate yet.
Do this next
Start free and add your stack
Free account, 1 product
Out-of-bounds read in Microsoft Office Excel allows an unauthorized attacker to disclose information locally.
- CVSS
- 5.5 MEDIUM (v3.1, CNA)CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:N/A:N/E:U/RL:O/RC:C
- Weakness (CWE)
- CWE-125
- Known exploited
- Not in CISA's KEV catalog
- EPSS (exploitation in the next 30 days)
- Not loaded for this CVE
- Assigned by
- microsoft
- NVD analysis
- Analyzed
- Record last updated
- Oct 8, 2026
- First seen by InfoSec Signals
- Oct 9, 2026
Affected products
Microsoft Microsoft 365 Apps for Enterprise microsoft:365_apps_for_enterprise (from the name) | from 16.0.1 before https://aka.ms/OfficeSecurityReleases | CNA record |
Microsoft Microsoft Excel 2016 microsoft:excel_2016 (from the name) | from 16.0.0.0 before 16.0.5561.1001 | CNA record |
Microsoft Microsoft Office 2019 microsoft:office_2019 (from the name) | from 19.0.0 before https://aka.ms/OfficeSecurityReleases | CNA record |
Microsoft Microsoft Office 365 for Mac microsoft:office_365_for_mac (from the name) | from 1.0.0 before 16.111.26071215 | CNA record |
Microsoft Microsoft Office LTSC 2021 microsoft:office_ltsc_2021 (from the name) | from 16.0.1 before https://aka.ms/OfficeSecurityReleases | CNA record |
Microsoft Microsoft Office LTSC 2024 microsoft:office_ltsc_2024 (from the name) | from 16.0.0 before https://aka.ms/OfficeSecurityReleases | CNA record |
Microsoft Microsoft Office LTSC for Mac 2021 microsoft:office_ltsc_for_mac_2021 (from the name) | from 16.0.1 before 16.111.26071215 | CNA record |
Microsoft Microsoft Office LTSC for Mac 2024 microsoft:office_ltsc_for_mac_2024 (from the name) | from 16.0.0 before 16.111.26071215 | CNA record |
Microsoft Office Online Server microsoft:office_online_server (from the name) | from 16.0.0.0 before 16.0.10417.20175 | CNA record |
microsoft 365_apps microsoft:365_apps | all versions; all versions | NVD |
microsoft excel microsoft:excel | 2016; 2016 | NVD |
microsoft microsoft_365 microsoft:microsoft_365 | all versions | NVD |
microsoft office_2019 microsoft:office_2019 | all versions; all versions | NVD |
microsoft office_2021 microsoft:office_2021 | all versions; all versions; all versions | NVD |
microsoft office_2024 microsoft:office_2024 | all versions; all versions; all versions | NVD |
microsoft office_online_server microsoft:office_online_server | before 16.0.10417.20175 | NVD |
References
- https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-55046vendor-advisory, patch
The CVE record on cve.org NVD's entry
The CVE record is authoritative. Products marked “from the name” were identified from the CNA's free-text names, not a CPE, and are matched less certainly. This product uses the NVD API but is not endorsed or certified by the NVD.