CVE-2026-70300 Microsoft Office Word Remote Code Execution Vulnerability
An attacker can execute arbitrary code remotely by exploiting an untrusted pointer dereference in Microsoft Office Word.
- Exploited in the wild
- Not known
- Login needed
- Not needed
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- None listed
What is CVE-2026-70300?
CVE-2026-70300 is a critical vulnerability in Microsoft 365 Apps, published on 13 Oct 2026. An attacker can exploit it over the internet without logging in, with no action from the victim.
Official description
Untrusted pointer dereference in Microsoft Office Word allows an unauthorized attacker to execute code over a network.
Weakness: CWE-822
Which versions are affected by CVE-2026-70300?
It affects 3 products.
Products include Microsoft 365 Apps, Microsoft Office 2021, Microsoft Office 2024.
How do I fix CVE-2026-70300?
No fix has been published for CVE-2026-70300 yet. Limit exposure of the affected software until one is available.
Is CVE-2026-70300 being exploited?
There is no known exploitation of CVE-2026-70300 in the wild and no public exploit code.
Other vulnerabilities in Microsoft 365 Apps
- CVE-2024-21413 Microsoft Outlook Improper Input Validation
- CVE-2023-23397 Microsoft Office Outlook Privilege Escalation
- CVE-2024-38189 Microsoft Project Remote Code Execution Vulnerability
- CVE-2023-35311 Microsoft Outlook Security Feature Bypass
- CVE-2026-21514 Microsoft Office Word Reliance on Untrusted Inputs in a Security Decision
Sources
Also known as GHSA-qj8r-m7gw-387x.