CVE-2026-62877
Microsoft Windows 10 1607: stack buffer overflow
- Risk score
- 67/100
- CVSS
- 7.8 v3.1
- Exploit chance (30 days)
- 0.3%
- Published
- 11 Aug 2026
Open in the live forecast Today's forecast
What to know
- What it is
- A stack-based buffer overflow in Windows Win32K allows an authorized attacker to elevate privileges locally. An attacker could use this vulnerability to gain elevated privileges on a local system.
- Affected
- {'products': ['Windows'], 'packages': [], 'versions': ['Windows 10 1607']}
- Fix
- Check the linked advisory for a fix, as none is specified in this record.
- Exploitation
- No known exploitation
Story map
At a glance
Microsoft Windows 10 1607: Red, act today. Use after free in Windows Message Queuing Queue Manager allows an unauthorized attacker to execute code over a network.
The flaws
- CVE-2026-62877: Stack buffer overflow (CVSS 7.8 · EPSS 0%)
- CVE-2026-100202: Use-after-free (CVSS 9.8 · EPSS 1%)
- CVE-2026-100222: Heap buffer overflow (CVSS 9.8 · EPSS 1%)
- CVE-2026-100220: Heap buffer overflow (CVSS 8.8 · EPSS 1%)
The fix
Fix: Apply the vendor's security update; see the linked advisory.
Who is exposed: Microsoft Windows 10 1607
Where it stands
- No known exploitation
How it unfolded
- 28 Oct, Microsoft Security Response Center (official): CVE-2026-62877 Windows Win32k Elevation of Privilege Vulnerability
Connects to
- Same weakness: Stack buffer overflow (CWE-121). 224 other warnings in 30 days
- Same product: Earlier Microsoft Windows 10 1607 warnings. 397 in the last 90 days
Why it is Amber
- CVSS 7.8 high
- On your watchlist: windows server
- Named in a government or vendor bulletin
Government and vendor bulletins
References
Original description
Stack-based buffer overflow in Windows Win32K allows an authorized attacker to elevate privileges locally.
Last activity 28 Oct 2026. Patch Forecast updates every hour.