CVE-2026-20841

Windows Notepad App Remote Code Execution Vulnerability

Improper neutralization of special elements used in a command ('command injection') in Windows Notepad App allows an unauthorized attacker to execute code locally.

Affected

Microsoft · Windows Notepad

CVSS v3.1 MICROSOFT

7.8 HIGHCVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H

EPSS

9.01% chance of exploitation in the next 30 days, 95th percentile

Published

2026-02-10

Updated

2026-08-19

Proof-of-concept exploits (14)

• hamzamalik3461/CVE-2026-208411★ · 2026-10-13
• BTtea/CVE-2026-20841-PoC142★ · 2026-02-11
• atiilla/CVE-2026-208415★ · 2026-02-12
• patchpoint/CVE-2026-2084112★ · 2026-02-12
• dogukankurnaz/CVE-2026-20841-PoC2★ · 2026-02-12
• tangent65536/CVE-2026-208412★ · 2026-02-11
• RajaUzairAbdullah/CVE-2026-208410★ · 2026-02-11
• SecureWithUmer/CVE-2026-208411★ · 2026-02-12
• 404godd/CVE-2026-20841-PoC0★ · 2026-10-14
• EleniChristopoulou/PoC-CVE-2026-208410★ · 2026-02-17
• hackfaiz/CVE-2026-20841-PoC1★ · 2026-02-12
• 0xBlackash/CVE-2026-208411★ · 2026-06-02
• whiskeylab/notepad_CVE_2026_208410★ · 2026-04-07
• heaker12/CVE-POC0★ · 2026-02-28

Security advisories

• https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-20841
• https://news.ycombinator.com/item?id=46971516

References

• CVE Record
• NVD entry

Related

• CVE-2012-1823
• CVE-2018-14714
• CVE-2024-4577
• CVE-2026-21852
• CVE-2026-2441
• CVE-2026-27876