Microsoft Office Excel Information Disclosure Vulnerability
CVE-2026-118300 is an information disclosure vulnerability in Microsoft Office Excel (rated Important, CVSS 6.5).
1 version
Facts
- Microsoft id
CVE-2026-118300- Products
- Microsoft Office Excel
- Severity
- Important
- Impact
- Information Disclosure
- CVSS
- 6.5
- CVSS vector
- CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:N/A:N/E:U/RL:O/RC:C
- Exploited
- No
- Publicly disclosed
- No
- Exploitability
- Exploitation Less Likely
- Customer action required
- Yes
- Release
- 2026-Nov
- Assigned by
- Microsoft
- Weakness
- CWE-125: Out-of-bounds Read
- MSRC revision
- 1.0
- Status pages
- Microsoft 365 apps status
- First captured by us
- Microsoft last modified
- Source
- Security updates · open the original at Microsoft
Microsoft's revision notes
- Revision 1.0, 2026-11-10:
Information published.
Microsoft says
Out-of-bounds read in Microsoft Office Excel allows an unauthorized attacker to disclose information over a network.
What Microsoft changed
One version so far. If Microsoft edits it, each change shows here with what was removed and added.
First version we captured ·
The text as we first saw it
Seen by us · Microsoft's timestamp · Microsoft's page
Related changes
Mentioning the same Microsoft ids
Other changes for Microsoft 365 apps
- Microsoft Office Excel Remote Code Execution Vulnerability
- Microsoft Office Excel Remote Code Execution Vulnerability
- Microsoft Office Excel Remote Code Execution Vulnerability
- Microsoft Office Excel Remote Code Execution Vulnerability
- Microsoft Office Excel Remote Code Execution Vulnerability
- Microsoft Office Excel Remote Code Execution Vulnerability
- Microsoft Office Excel Remote Code Execution Vulnerability
- Microsoft Office Excel Remote Code Execution Vulnerability
Last updated