CVE-2026-97739
Microsoft 365 Apps: heap buffer overflow
- Risk score
- 69/100
- CVSS
- 8.8 v3.1
- Exploit chance (30 days)
- 0.8%
- Published
- 13 Oct 2026
Open in the live forecast Today's forecast
What to know
- What it is
- Integer underflow (wrap or wraparound) in Microsoft Office Excel allows an unauthorized attacker to execute code over a network.
- Affected
- Microsoft 365 Apps
- Fix
- Apply the vendor's security update; see the linked advisory.
- Exploitation
- No known exploitation
Why it is Amber
- CVSS 8.8 high
- Remotely exploitable without logging in
References
Original description
Integer underflow (wrap or wraparound) in Microsoft Office Excel allows an unauthorized attacker to execute code over a network.
Last activity 13 Oct 2026. Patch Forecast updates every hour.