CVE detail
CVE-2026-20820
Heap-based buffer overflow in Windows Common Log File System Driver allows an authorized attacker to elevate privileges locally.
Buzz score
Why this CVE is surfacing
This all-time snapshot uses the same composite formula as Trending across a 30-year evidence window, rather than a current rolling window.
Buzz score components · mention 11.0 · diversity 10.0 · KEV 0.0 · OTX 0.0 · PoC 0.0
Why it matters now
Mention timeline
- Total mentions
- 0
- within the 30d window
- Peak daily
- 0
- highest bucket
Evidence
Source links by recency
2 source links · newest first
Eight critical vulnerabilities and an actively exploited zero day highlight Microsoft’s first Patch Tuesday announcements for 2026. Most of the higher scoring vulnerabilities impact Office products, with two holes in SharePoint scoring an 8.8 on the CVSS scale. “Last year’s abuse of SharePoint by Chinese APTs to deploy ToolShell against organizations should serve as a […]
newswww.csoonline.comJan 14, 2026, 1:50 AM- https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-20820msrc.microsoft.com
No excerpt available.
Vendor Advisorymsrc.microsoft.comJan 13, 2026, 6:16 PM
Exploit code
Public exploit repository references
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0 repository references · best confidence N/A · max 0 stars
Related records
Similar CVEs
6 related CVEs with shared weakness or product evidence
- CVE-2026-20922CVSS 7.8 · High
Heap-based buffer overflow in Windows NTFS allows an authorized attacker to execute code locally.
- CVE-2026-20868CVSS 8.8 · High
Heap-based buffer overflow in Windows Routing and Remote Access Service (RRAS) allows an unauthorized attacker to execute code over a network.
- CVE-2026-20840CVSS 7.8 · High
Heap-based buffer overflow in Windows NTFS allows an authorized attacker to execute code locally.
- CVE-2025-64678CVSS 8.8 · High
Heap-based buffer overflow in Windows Routing and Remote Access Service (RRAS) allows an unauthorized attacker to execute code over a network.
- CVE-2025-62470CVSS 7.8 · High
Heap-based buffer overflow in Windows Common Log File System Driver allows an authorized attacker to elevate privileges locally.
- CVE-2025-62452CVSS 8.0 · High
Heap-based buffer overflow in Windows Routing and Remote Access Service (RRAS) allows an authorized attacker to execute code over a network.