CVE-2026-70242
Microsoft 365 Apps: heap buffer overflow
- Risk score
- 76/100
- CVSS
- 9.8 v3.1
- Exploit chance (30 days)
- 1.0%
- Published
- 13 Oct 2026
Open in the live forecast Today's forecast
What to know
- What it is
- Heap-based buffer overflow in Microsoft Office Outlook 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
In the news
TL;DR
Microsoft patches 1400+ CVEs, including CVE-2026-70242, a critical heap-based buffer overflow in Outlook.
- CVE-2026-70242 is a critical vulnerability (CVSS 9.8) in Microsoft Office Outlook.
- It allows an unauthorized attacker to execute code over a network.
- The vulnerability is remotely exploitable without logging in.
- It is not mentioned whether exploitation in the wild is confirmed, reported, or a proof of concept.
AI summary of 1 article.
Why it is Amber
- CVSS 9.8 critical
- Remotely exploitable without logging in
References
Original description
Heap-based buffer overflow in Microsoft Office Outlook allows an unauthorized attacker to execute code over a network.
Last activity 13 Oct 2026. Patch Forecast updates every hour.