VDB
CVE-2026-21517
CVE-2026-21517
PUBLISHED
CVSS 7.800000190734863 HIGH
Improper neutralization of special elements used in a command ('command injection') in Windows Notepad App allows an unauthorized attacker to execute code locally.
EPSS 0.04% · 13.8th percentile
Risk Scores
CVSS 3.1
7.800000190734863
CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H/E:U/RL:O/RC:C
EPSS Score
0.04%
13.8th percentile
Affected Products
| Vendor | Product | Versions |
|---|---|---|
| microsoft | window_notepad | 11.0.0 |
| Microsoft | Windows Notepad | 11.0.0 |
Exploit Intelligence
- https://www.microsoft.com/en-us/msrc/exploitability-index?rtc=1 (msrc)
- https://news.ycombinator.com/item?id=46971516 (circl)
- Windows Notepad App Remote Code Execution Vulnerability (circl)
- CIRCL seen: CVE-2026-20841 (circl-sighting)
- CIRCL seen: CVE-2026-20841 (circl-sighting)
- CIRCL seen: CVE-2026-20841 (circl-sighting)
- CIRCL seen: CVE-2026-20841 (circl-sighting)
- CIRCL seen: CVE-2026-20841 (circl-sighting)
- CIRCL seen: CVE-2026-20841 (circl-sighting)
- CIRCL seen: CVE-2026-20841 (circl-sighting)
…and 129 more exploits
Timeline
- Feb 10, 2026 CVE Published
- Feb 10, 2026 PoC Published
- Feb 10, 2026 PoC Published
- Feb 10, 2026 PoC Published
- Feb 10, 2026 PoC Published
- Feb 11, 2026 EPSS Score
- Feb 11, 2026 PoC Published
- Feb 11, 2026 PoC Published
- Feb 11, 2026 PoC Published
- Feb 11, 2026 PoC Published
- Feb 11, 2026 PoC Published
- Feb 11, 2026 PoC Published
References
- https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-21251 advisory
- https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-21231 advisory
- https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-20846 advisory
- https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-21513 advisory
- https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-21519 advisory
- https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-21247 advisory
- https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-21238 advisory
- https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-21241 advisory
- https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-21244 advisory
- https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-21243 advisory
- https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-21245 advisory
- https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-21232 advisory
- https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-21525 advisory
- https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-21235 advisory
- https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-21248 advisory
- https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-21234 advisory
- https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-21517 advisory
- https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-21250 advisory
- https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-21218 advisory
- https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-20841 advisory
…and 15 more