CVE-2026-20847
published 2026-01-13CVE-2026-20847: Exposure of sensitive information to an unauthorized actor in Windows Shell allows an authorized attacker to perform spoofing over a network.
PriorityP340medium6.5CVSS 3.1
AVNACLPRLUINSUCHINAN
EPSS
1.30%
67.2th percentile
Exposure of sensitive information to an unauthorized actor in Windows Shell allows an authorized attacker to perform spoofing over a network.
Affected
44 ranges· showing 25
| Vendor | Product | Version range | Fixed in |
|---|---|---|---|
| microsoft | windows_10_1607 | < 10.0.14393.8783 | 10.0.14393.8783 |
| microsoft | windows_10_1809 | < 10.0.17763.8276 | 10.0.17763.8276 |
| microsoft | windows_10_21h2 | < 10.0.19044.6809 | 10.0.19044.6809 |
| microsoft | windows_10_22h2 | < 10.0.19045.6809 | 10.0.19045.6809 |
| microsoft | windows_10_version_1607 | >= 10.0.14393.0 < 10.0.14393.8783 | 10.0.14393.8783 |
| microsoft | windows_10_version_1809 | >= 10.0.17763.0 < 10.0.17763.8276 | 10.0.17763.8276 |
| microsoft | windows_10_version_21h2 | >= 10.0.19044.0 < 10.0.19044.6809 | 10.0.19044.6809 |
| microsoft | windows_10_version_22h2 | >= 10.0.19045.0 < 10.0.19045.6809 | 10.0.19045.6809 |
| microsoft | windows_11_23h2 | < 10.0.22631.6491 | 10.0.22631.6491 |
| microsoft | windows_11_24h2 | < 10.0.26100.7623 | 10.0.26100.7623 |
| microsoft | windows_11_25h2 | < 10.0.26200.7623 | 10.0.26200.7623 |
| microsoft | windows_11_version_22h3 | >= 10.0.22631.0 < 10.0.22631.6491 | 10.0.22631.6491 |
| microsoft | windows_11_version_23h2 | >= 10.0.22631.0 < 10.0.22631.6491 | 10.0.22631.6491 |
| microsoft | windows_11_version_24h2 | >= 10.0.26100.0 < 10.0.26100.7623 | 10.0.26100.7623 |
| microsoft | windows_11_version_25h2 | >= 10.0.26200.0 < 10.0.26200.7623 | 10.0.26200.7623 |
| microsoft | windows_server_2008 | — | — |
| microsoft | windows_server_2008_r2_service_pack_1 | >= 6.1.7601.0 < 6.1.7601.28117 | 6.1.7601.28117 |
| microsoft | windows_server_2012 | — | — |
| microsoft | windows_server_2012 | >= 6.2.9200.0 < 6.2.9200.25868 | 6.2.9200.25868 |
| microsoft | windows_server_2012_r2 | >= 6.3.9600.0 < 6.3.9600.22968 | 6.3.9600.22968 |
| microsoft | windows_server_2016 | < 10.0.14393.8783 | 10.0.14393.8783 |
| microsoft | windows_server_2016 | >= 10.0.14393.0 < 10.0.14393.8783 | 10.0.14393.8783 |
| microsoft | windows_server_2019 | < 10.0.17763.8276 | 10.0.17763.8276 |
| microsoft | windows_server_2019 | >= 10.0.17763.0 < 10.0.17763.8276 | 10.0.17763.8276 |
| microsoft | windows_server_2022 | < 10.0.20348.4648 | 10.0.20348.4648 |
CVSS provenance
nvdv3.16.5MEDIUMCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N
vendor_msrc6.5MEDIUM
Stop checking back — get the weekly exploitation signal.
Every Monday: what got weaponized or added to CISA KEV in the last seven days — each CVE cross-linked to its PoC, Nuclei template, and detection rule. Free, one email a week, unsubscribe in one click.
Microsoft
Microsoft Windows File Explorer Spoofing Vulnerability
vendor_msrc·2026-01-13·CVSS 6.5
CVE-2026-20847 [MEDIUM] CWE-200 Microsoft Windows File Explorer Spoofing Vulnerability
Microsoft Windows File Explorer Spoofing Vulnerability
Description: Exposure of sensitive information to an unauthorized actor in Windows Shell allows an authorized attacker to perform spoofing over a network.
Windows Shell: Windows Shell
Microsoft: Microsoft
Customer Action Required: Yes
Impact: Spoofing
Exploit Status: Publicly Disclosed:No;Exploited:No;Latest Software Release:Exploitation Unlikely
Reference: https://catalog.update.microsoft.com/v7/site/Search.aspx?q=KB5073723
Reference: https://support.microsoft.com/help/5073723
Reference: https://catalog.update.microsoft.com/v7/site/Search.aspx?q=KB5073457
Reference: https://support.microsoft.com/help/5073457
Reference: https://catalog.update.microsoft.com/v7/site/Search.aspx?q=KB5073724
Reference: https://support.microsoft
GHSA
GHSA-xmr8-fvh4-85cv: Exposure of sensitive information to an unauthorized actor in Windows Shell allows an authorized attacker to perform spoofing over a network
ghsa_unreviewed·2026-01-13
CVE-2026-20847 [MEDIUM] CWE-200 GHSA-xmr8-fvh4-85cv: Exposure of sensitive information to an unauthorized actor in Windows Shell allows an authorized attacker to perform spoofing over a network
Exposure of sensitive information to an unauthorized actor in Windows Shell allows an authorized attacker to perform spoofing over a network.
No detection rules found.
No public exploits indexed.
Bleepingcomputer
Microsoft January 2026 Patch Tuesday fixes 3 zero-days, 114 flaws
blogs_bleepingcomputer·2026-01-13·CVSS 5.5
[MEDIUM] Microsoft January 2026 Patch Tuesday fixes 3 zero-days, 114 flaws
## Microsoft January 2026 Patch Tuesday fixes 3 zero-days, 114 flaws
## Lawrence Abrams
57 Elevation of Privilege vulnerabilities
3 Security Feature Bypass vulnerabilities
22 Remote Code Execution vulnerabilities
22 Information Disclosure vulnerabilities
2 Denial of Service vulnerabilities
5 Spoofing vulnerabilities
When BleepingComputer reports on Patch Tuesday security updates, we only count those released by Microsoft today. Therefore, the number of flaws does not include Microsoft Edge (1 flaw) and Mariner vulnerabilities fixed earlier this month.
To learn more about the non-security updates released today, you can review our dedicated articles on the Windows 11 KB5074109 & KB5073455 cumulative updates and Windows 10 KB5073724 extended security update .
## 3 zero-days, one ex
Wiz
CVE-2026-20847 Impact, Exploitability, and Mitigation Steps | Wiz
blogs_wiz·CVSS 6.5
CVE-2026-20847 [MEDIUM] CVE-2026-20847 Impact, Exploitability, and Mitigation Steps | Wiz
## CVE-2026-20847 :
vulnerability analysis and mitigation
Exposure of sensitive information to an unauthorized actor in Windows Shell allows an authorized attacker to perform spoofing over a network.
Source : NVD
## 6.5
Score
Published January 13, 2026
Severity MEDIUM
CNA Score 6.5
Has Public Exploit No
Has CISA KEV Exploit No
CISA KEV Release Date N/A
CISA KEV Due Date N/A
Exploitation Probability Percentile (EPSS) 27.9
Exploitation Probability (EPSS) 0.1
Sources
NVD
## Get a CVE risk assessment
Get a prioritized view of CVEs in your cloud—so you can focus on what's exploitable, not just what's listed.
Free Vulnerability Assessment
## Benchmark your Cloud Security Posture
Evaluate your cloud security practices across 9 security domains to benchmark your risk lev
2026-01-13
Published