CVE-2026-68797: Microsoft Excel Information Disclosure Vulnerability
Out-of-bounds read in Microsoft Office Excel allows an unauthorized attacker to disclose information locally.
CSIRTS triage
- What
- Out-of-bounds read in Excel allows disclosure of local memory contents.
- Who is affected
- Users with Microsoft Excel installed who open untrusted spreadsheets.
- Urgency
- Medium severity with no active exploitation; standard patch cycle applies.
- Action
- Apply the latest Microsoft Excel security update when available.
AI-assisted analysis generated from the source advisory — verify against the original.
⚡ Watch Excel
Get an email when a new Excel advisory drops — max one per day, one-click unsubscribe.
Details
Original advisory: https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-68797
Exploitation outlook
EPSS (FIRST.org) estimates each CVE’s probability of exploitation in the next 30 days — here is the CSIRTS.com read on those numbers.
- Low exploitation riskCVE-2026-687970.45% 30-day exploitation probability — currently an unlikely target, but scores change as exploit code circulates. Riskier than 37% of all EPSS-scored CVEs.
Referenced CVEs
| CVE | CSIRTS overview | External |
|---|---|---|
| CVE-2026-68797 | coverage & exploitation status | NVD · CVE.org |
Same CVEs, other sources
How other CERTs, PSIRTs and databases cover the vulnerabilities in this advisory.
- high[NEW] [high] Microsoft Office Products: Multiple Vulnerabilitiescert-bund
- unknownMultiple vulnerabilities in Microsoft Office (August 12, 2026)cert-fr-avis
- unknownNCSC-2026-0286 [1.00] [M/H] Vulnerabilities patched in Microsoft Officencsc-nl
- mediumCVE-2026-68797: Out-of-bounds read in Microsoft Office Excel allows an unauthorized attacker to disclose infor…nvd
Recent advisories for Microsoft Excel Information
A cluster of recent advisories against the same product widens the attack surface — attackers routinely chain freshly published CVEs on one product, so review these together.
- mediumCVE-2026-70328: Out-of-bounds read in Microsoft Office Excel allows an unauthorized attacker to disclose infor…nvd · 2026-08-11
- mediumCVE-2026-70327: Out-of-bounds read in Microsoft Office Excel allows an unauthorized attacker to disclose infor…nvd · 2026-08-11
- mediumCVE-2026-70318: Improper input validation in Microsoft Office Excel allows an unauthorized attacker to disclos…nvd · 2026-08-11
- mediumCVE-2026-68813: Out-of-bounds read in Microsoft Office Excel allows an unauthorized attacker to disclose infor…nvd · 2026-08-11
- mediumCVE-2026-68808: Out-of-bounds read in Microsoft Office Excel allows an unauthorized attacker to disclose infor…nvd · 2026-08-11
- mediumCVE-2026-68802: Out-of-bounds read in Microsoft Office Excel allows an unauthorized attacker to disclose infor…nvd · 2026-08-11
More from Microsoft Security Response Center
- highCVE-2026-70354: .NET Core Remote Code Execution Vulnerability2026-08-11
- highCVE-2026-68792: Microsoft Office Elevation of Privilege Vulnerability2026-08-11
- highCVE-2026-64909: Microsoft Office Remote Code Execution Vulnerability2026-08-11
- highCVE-2026-70130: Microsoft Office Remote Code Execution Vulnerability2026-08-11
- highCVE-2026-66807: Microsoft Office Graphics Component Remote Code Execution Vulnerability2026-08-11