CVE-2026-68817
Microsoft Excel Remote Code Execution Vulnerability
CVE-2026-68817 is a high vulnerability (CVSS 7.8) in Microsoft Excel, published August 11, 2026. No source lists public exploit code. EPSS puts the chance of exploitation in the next 30 days at 0.47%, the 40th percentile. No source names a fixed version.
- Severity
- 7.8 HighCVSS 3.1, CVE List
- Exploit chance
- 0.47%EPSS, 40th percentile
- Exploitation
- None knownNot on CISA’s or ENISA’s lists
- Fixed in
- No fix listedNo source names one
Description
Stack-based buffer overflow in Microsoft Office Excel allows an unauthorized attacker to execute code 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
- High
- Integrity
- High
- Availability
- High
Exploit likelihood
Affected products
- microsoft excel
- microsoft 365 apps
- microsoft 365 apps for enterprise
- microsoft excel 2016
- microsoft office 2019
- microsoft office 365 for mac
- microsoft office ltsc 2021
- microsoft office ltsc 2024
- microsoft office ltsc for mac 2021
- microsoft office ltsc for mac 2024
- microsoft 365
- microsoft office online server
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What each source reports
CVE List Score used
Microsoft Excel Remote Code Execution Vulnerability
Stack-based buffer overflow in Microsoft Office Excel allows an unauthorized attacker to execute code locally.
- Record
CVE-2026-68817- CVSS 3.1
- 7.8 High
CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H/E:U/RL:O/RC:C - Weakness
- CWE-121
- Updated
- 2026-11-10
EUVDEUVD-2026-56762
Stack-based buffer overflow in Microsoft Office Excel allows an unauthorized attacker to execute code locally.
- Record
EUVD-2026-56762- CVSS 3.1
- 7.8 High
CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H/E:U/RL:O/RC:C - Updated
- 2026-11-10
GitHub AdvisoriesGHSA-6mcr-3v92-fh29
Stack-based buffer overflow in Microsoft Office Excel allows an unauthorized attacker to execute...
Stack-based buffer overflow in Microsoft Office Excel allows an unauthorized attacker to execute code locally.
- Record
GHSA-6mcr-3v92-fh29- CVSS 3.1
- 7.8 High
CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H - Weakness
- CWE-121
- Updated
- 2026-11-02
NVD
Stack-based buffer overflow in Microsoft Office Excel allows an unauthorized attacker to execute code locally.
- Record
CVE-2026-68817- CVSS 3.1
- 7.8 High
CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H - Weakness
- CWE-121
- Updated
- 2026-11-02
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.