CVE-2026-83770 Windows Text Shaping Remote Code Execution Vulnerability
Heap-based buffer overflow in Windows Text Shaping allows remote attackers to execute arbitrary code.
- 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-2026-83770?
CVE-2026-83770 is a critical memory corruption vulnerability in Microsoft Windows 10 Version 1607, published on 13 Oct 2026. An attacker can exploit it over the internet without logging in, with no action from the victim.
Official description
Heap-based buffer overflow in Windows Text Shaping allows an unauthorized attacker to execute code over a network.
Weakness: CWE-122
Which versions are affected by CVE-2026-83770?
How do I fix CVE-2026-83770?
No fix has been published for CVE-2026-83770 yet. Limit exposure of the affected software until one is available.
Upgrade to the fixed version. Memory-safe languages, compiler hardening and fuzzing prevent most new cases. More about Memory corruption.
Is CVE-2026-83770 being exploited?
There is no known exploitation of CVE-2026-83770 in the wild and no public exploit code.
Sources
Also known as GHSA-5g43-wjjc-h73p.