CVE-2026-45639 | Windows Remote Desktop Protocol (RDP) Information Disclosure Vulnerability

Out-of-bounds read in Windows RDP allows an unauthorized attacker to disclose information over a network.

Published: 2026-06-09 Last update: 2026-06-18 Assigner: [email protected] Source: [email protected]

NVD Status：Analyzed，CVE State: published

View at NVD, CVE.org, EUVD

Threat Intelligence & Risk Assessment for CVE-2026-45639

EPSS CVSS CWE GHSA Affected

Conclusion & alert: CVE-2026-45639 is rated Moderate Risk (49.1/100): CVSS High severity, with medium exploitation likelihood (EPSS 0.87%). Mandatory action: Review affected assets and schedule remediation.

Risk is dynamic; we continuously reassess and refresh what is shown on this page as upstream context changes.

Exploit prediction scoring system (EPSS) score for CVE-2026-45639

EPSS lead: Daily EPSS estimates relative likelihood of exploitation; percentile ranks this CVE among scored vulnerabilities (higher = more severe relative rank).

#	Date	Old EPSS score	New EPSS score	Delta (New - Old)
1	2026-06-23	0.69%	0.87%	+0.18%
2	2026-06-15	0.08%	0.69%	+0.61%
3	2026-06-10	—	0.08%	—

Full EPSS history (3 records total)

Common vulnerability scoring system (CVSS) metrics for CVE-2026-45639

CVSS metrics for this CVE.

Base score	Version	Severity	Vector	Exploitability	Impact	Score source
7.5	3.1	HIGH	`CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N` Click to expand Attack vector (AV:N) Could be attacked over the internet or any normal routed network—not just someone sitting at the machine. Attack complexity (AC:L) Once they can reach the bug, pulling it off is straightforward—no weird race conditions or rare setup. Privileges required (PR:N) No account or special rights needed—anonymous or random user is enough. User interaction (UI:N) Nobody has to click “OK” or open a trap file; it can work without a victim helping. Scope (S:U) Damage stays in the same “trust bubble” as the broken component—no big spill into unrelated systems. Confidentiality (C:H) Serious risk that confidential data gets exposed in a big way. Integrity (I:N) Data isn’t meaningfully altered or forged. Availability (A:N) Service keeps running; no real outage angle.	3.9	3.6	[email protected]

Weakness enumeration for CVE-2026-45639

CWE-125 MITRE ↗

GitHub Security Advisory for CVE-2026-45639

GHSA-hpch-68rw-xfqq · Severity: high — Out-of-bounds read in Windows RDP allows an unauthorized attacker to disclose information over a...

Affected software / configurations for CVE-2026-45639

Vendor	Product	Version	Raw CPE
microsoft	windows_app_client_for_windows_desktop	>= 1.00, < 2.0.1193.0	cpe:2.3:a:microsoft:windows_app_client_for_windows_desktop::::::windows::*
microsoft	windows_10_1809	>= 10.0.17763.0, < 10.0.17763.8880	cpe:2.3:o:microsoft:windows_10_1809:::::::x86:*
microsoft	windows_server_2019	>= 10.0.17763.0, < 10.0.17763.8880	cpe:2.3:o:microsoft:windows_server_2019::::::::
microsoft	remote_desktop	>= 1.2.0.0, < 1.2.7214.0	cpe:2.3:a:microsoft:remote_desktop::::::windows::*
microsoft	windows_server_2022	>= 10.0.20348.0, < 10.0.20348.5256	cpe:2.3:o:microsoft:windows_server_2022::::::::
microsoft	windows_10_21H2	>= 10.0.19044.0, < 10.0.19044.7417	cpe:2.3:o:microsoft:windows_10_21H2:::::::x86:*
microsoft	windows_10_22H2	>= 10.0.19045.0, < 10.0.19045.7417	cpe:2.3:o:microsoft:windows_10_22H2:::::::x64:*
microsoft	windows_server_2025	>= 10.0.26100.0, < 10.0.26100.32995	cpe:2.3:o:microsoft:windows_server_2025::::::::
microsoft	windows_11_25H2	>= 10.0.26200.0, < 10.0.26200.8655	cpe:2.3:o:microsoft:windows_11_25H2:::::::arm64:*
microsoft	windows_11_23H2	>= 10.0.22631.0, < 10.0.22631.7219	cpe:2.3:o:microsoft:windows_11_23H2:::::::arm64:*
microsoft	windows_11_23H2	>= 10.0.22631.0, < 10.0.22631.7219	cpe:2.3:o:microsoft:windows_11_23H2:::::::x64:*
microsoft	windows_11_24H2	>= 10.0.26100.0, < 10.0.26100.8655	cpe:2.3:o:microsoft:windows_11_24H2:::::::arm64:*
microsoft	windows_11_26H1	>= 10.0.28000.0, < 10.0.28000.2269	cpe:2.3:o:microsoft:windows_11_26H1:::::::x64:*
microsoft	windows_10_1607	>= 10.0.14393.0, < 10.0.14393.9234	cpe:2.3:o:microsoft:windows_10_1607:::::::x86:*
microsoft	windows_server_2016	>= 10.0.14393.0, < 10.0.14393.9234	cpe:2.3:o:microsoft:windows_server_2016::::::::
microsoft	windows_server_2012	>= 6.2.9200.0, < 6.2.9200.26132	cpe:2.3:o:microsoft:windows_server_2012:::::::x64:*
microsoft	windows_server_2012_R2	>= 6.3.9600.0, < 6.3.9600.23228	cpe:2.3:o:microsoft:windows_server_2012_R2:::::::x64:*

References for CVE-2026-45639

URL	Tags
https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-45639	Vendor Advisory

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