CVE-2026-20823

Name: CVE-2026-20823
Creator: NVD / NIST
Published: 2026-01-13T18:16:09.65+00:00
License: https://creativecommons.org/publicdomain/zero/1.0/

MEDIUMCVSS 5.5/10EPSS 0.65%

Last modified Jun 17, 2026

CVE-2026-20823 is a medium-severity vulnerability rated 5.5/10 on the CVSS scale. Exposure of sensitive information to an unauthorized actor in Windows File Explorer allows an authorized attacker to disclose information locally.. EPSS estimates a 0.65% chance of exploitation in the next 30 days.

Description

Exposure of sensitive information to an unauthorized actor in Windows File Explorer allows an authorized attacker to disclose information locally.

Metrics

CVSS 3.1

5.5/10

CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N

EPSS Probability

0.65%

46.7th percentile

Probability of exploitation in the next 30 days. Learn more

Weakness Enumeration

CWE-200

Affected Software

Vendor	Product	Versions
Microsoft	Windows 10 1607	< 10.0.14393.8783
Microsoft	Windows 10 1809	< 10.0.17763.8276
Microsoft	Windows 10 21h2	< 10.0.19044.6809
Microsoft	Windows 10 22h2	< 10.0.19045.6809
Microsoft	Windows 11 23h2	< 10.0.22631.6491
Microsoft	Windows 11 24h2	< 10.0.26100.7623
Microsoft	Windows 11 25h2	< 10.0.26200.7623
Microsoft	Windows Server 2016	< 10.0.14393.8783
Microsoft	Windows Server 2019	< 10.0.17763.8276
Microsoft	Windows Server 2022	< 10.0.20348.4648
Microsoft	Windows Server 2022 23h2	< 10.0.25398.2092
Microsoft	Windows Server 2025	< 10.0.26100.32230

References

https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-20823Vendor Advisory

Timeline

Published: Jan 13, 2026
Last Modified: Jun 17, 2026
Status: Analyzed

Frequently Asked Questions

What is CVE-2026-20823?

Exposure of sensitive information to an unauthorized actor in Windows File Explorer allows an authorized attacker to disclose information locally.

How severe is CVE-2026-20823?

CVE-2026-20823 has a CVSS score of 5.5/10 (MEDIUM severity). The EPSS model estimates a 0.65% probability of exploitation in the next 30 days.

How do I fix CVE-2026-20823?

Check the vendor references and advisories linked above for patched versions and mitigation guidance. You can also run a Strix scan to test if your systems are affected.

Are you affected by CVE-2026-20823?

Run a free Strix scan to check your systems for this vulnerability.

Scan your code now

Source: NVD / NIST