CVE-2026-48563
published 2026-06-09CVE-2026-48563: Heap-based buffer overflow in Remote Desktop Client allows an unauthorized attacker to execute code over a network.
PriorityP349high7.5CVSS 3.1
AVNACHPRNUIRSUCHIHAH
EPSS
0.46%
36.0th percentile
Heap-based buffer overflow in Remote Desktop Client allows an unauthorized attacker to execute code over a network.
Affected
20 ranges
| Vendor | Product | Version range | Fixed in |
|---|---|---|---|
| microsoft | windows_10_1809 | < 10.0.17763.8880 | 10.0.17763.8880 |
| microsoft | windows_10_21h2 | < 10.0.19044.7417 | 10.0.19044.7417 |
| microsoft | windows_10_22h2 | < 10.0.19045.7417 | 10.0.19045.7417 |
| microsoft | windows_10_version_1809 | >= 10.0.17763.0 < 10.0.17763.8880 | 10.0.17763.8880 |
| microsoft | windows_10_version_21h2 | >= 10.0.19044.0 < 10.0.19044.7417 | 10.0.19044.7417 |
| microsoft | windows_10_version_22h2 | >= 10.0.19045.0 < 10.0.19045.7417 | 10.0.19045.7417 |
| microsoft | windows_11_23h2 | < 10.0.22631.7219 | 10.0.22631.7219 |
| microsoft | windows_11_24h2 | < 10.0.26100.8655 | 10.0.26100.8655 |
| microsoft | windows_11_25h2 | < 10.0.26200.8655 | 10.0.26200.8655 |
| microsoft | windows_11_26h1 | < 10.0.28000.2269 | 10.0.28000.2269 |
| microsoft | windows_11_version_23h2 | >= 10.0.22631.0 < 10.0.22631.7219 | 10.0.22631.7219 |
| microsoft | windows_11_version_24h2 | >= 10.0.26100.0 < 10.0.26100.8655 | 10.0.26100.8655 |
| microsoft | windows_11_version_25h2 | >= 10.0.26200.0 < 10.0.26200.8655 | 10.0.26200.8655 |
| microsoft | windows_11_version_26h1 | >= 10.0.28000.0 < 10.0.28000.2269 | 10.0.28000.2269 |
| microsoft | windows_server_2019 | < 10.0.17763.8880 | 10.0.17763.8880 |
| microsoft | windows_server_2019 | >= 10.0.17763.0 < 10.0.17763.8880 | 10.0.17763.8880 |
| microsoft | windows_server_2022 | < 10.0.20348.5256 | 10.0.20348.5256 |
| microsoft | windows_server_2022 | >= 10.0.20348.0 < 10.0.20348.5256 | 10.0.20348.5256 |
| microsoft | windows_server_2025 | < 10.0.26100.32995 | 10.0.26100.32995 |
| microsoft | windows_server_2025 | >= 10.0.26100.0 < 10.0.26100.32995 | 10.0.26100.32995 |
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VulDB
Microsoft Windows up to Server 2025 Remote Desktop Client use after free
vuldb·2026-06-09·CVSS 7.5
CVE-2026-48563 [HIGH] Microsoft Windows up to Server 2025 Remote Desktop Client use after free
A vulnerability described as critical has been identified in Microsoft Windows up to Server 2025. Affected by this issue is some unknown functionality of the component Remote Desktop Client. Executing a manipulation can lead to use after free.
This vulnerability is handled as CVE-2026-48563. The attack can be executed remotely. There is not any exploit available.
Upgrading the affected component is recommended.
GHSA
Heap-based buffer overflow in Remote Desktop Client allows an unauthorized attacker to execute code over a network.
ghsa_unreviewed·2026-06-09
CVE-2026-48563 [HIGH] CWE-416 Heap-based buffer overflow in Remote Desktop Client allows an unauthorized attacker to execute code over a network.
Heap-based buffer overflow in Remote Desktop Client allows an unauthorized attacker to execute code over a network.
No detection rules found.
No public exploits indexed.
Tenable
Microsoft’s June 2026 Patch Tuesday Addresses 198 CVEs ( CVE-2026-49160, CVE-2026-50507)
blogs_tenable·2026-06-09·CVSS 9.1
CVE-2026-49160 [CRITICAL] Microsoft’s June 2026 Patch Tuesday Addresses 198 CVEs ( CVE-2026-49160, CVE-2026-50507)
## Microsoft’s June 2026 Patch Tuesday Addresses 198 CVEs ( CVE-2026-49160, CVE-2026-50507)
32 Critical
166 Important
0 Moderate
0 Low
Microsoft addresses 198 CVEs in the largest Patch Tuesday release, including three zero-days.
Microsoft patched 198 CVEs in its June 2026 Patch Tuesday release, with 32 rated critical and 166 rated as important. Our counts omitted 6 CVEs that were already addressed by Microsoft via servicing and do not require additional customer action to resolve as well as 2 CVEs that were disclosed by other CNAs (CVE-2025-10263 and CVE-2026-8863). This Patch Tuesday release is the largest release since the Patch Tuesday program began, smashing the previous record of 167 CVEs in the October 2025 Patch Tuesday release.
This month’s update includes patches for:
.NET
Qualys
Microsoft and Adobe Patch Tuesday, June 2026 Security Update Review
blogs_qualys·2026-06-09
CVE-2026-49160 Microsoft and Adobe Patch Tuesday, June 2026 Security Update Review
## Table of Contents
Microsoft Patch Tuesday forJune2026
Adobe Patch for June 2026
Zero-dayVulnerabilities Patched in June Patch Tuesday Edition
Critical Severity Vulnerabilities Patched inJunePatch Tuesday Edition
Other Microsoft Vulnerability Highlights
Microsoft Release Summary
EVALUATE Vendor-Suggested Mitigation with Policy Audit (PA)
Qualys Monthly Webinar Series
Every Patch Tuesday presents a race between defenders applying fixes and attackers seeking opportunities. Microsoft’s June 2026 release is no exception, delivering security updates for vulnerabilities that could significantly impact enterprise environments if left unaddressed.
## Microsoft Patch Tuesday for June 2026
This month’s release addresses 206 vulnerabilities, including 33 critical and 167 important-severi
Talos
Microsoft Patch Tuesday for June 2026 — Snort rules and prominent vulnerabilities
blogs_talos·2026-06-09·CVSS 8.8
CVE-2026-42985 [HIGH] Microsoft Patch Tuesday for June 2026 — Snort rules and prominent vulnerabilities
## Microsoft Patch Tuesday for June 2026 — Snort rules and prominent vulnerabilities
Microsoft has released its monthly security update for June 2026, which includes 206 vulnerabilities affecting a range of products, including 32 that Microsoft marked as “critical”.
Out of 32 "critical" entries, 28 are remote code execution (RCE) vulnerabilities in Microsoft Windows services and applications including Windows Active Directory, Windows Kerberos Key Distribution Centre (KDC), Windows Graphics component, Windows Remote Desktop client, Windows Deployment Services (WDS), DHCP Client service, Windows Hyper-V, Windows Kernel and Media, Azure Kubernetes Service (AKS), Microsoft Office, Microsoft Outlook, Microsoft Word, Microsoft SQL server and Windows HTTP Protocol Stack.
Talos highlights 4 cr
Sans Isc
Microsoft June 2026 Patch Tuesday, (Tue, Jun 9th)
blogs_sans_isc·2026-06-09·CVSS 8.8
CVE-2026-49160 [HIGH] Microsoft June 2026 Patch Tuesday, (Tue, Jun 9th)
Microsoft June 2026 Patch Tuesday
Published: 2026-06-09. Last Updated: 2026-06-09 17:34:29 UTC
by Johannes Ullrich (Version: 1)
0 comment(s)
Microsoft today released patches for 204 vulnerabilities. 38 of these vulnerabilities are considered critical, and three have been disclosed before today. Six of the vulnerabilities affect Microsoft cloud solutions and do not require any user action. In addition, Microsoft incorporated 360 different vulnerabilities affecting Chromium into its Edge browser.
This is certainly a busier-than-usual patch Tuesday. In particular, the large number of patched Chromium/Edge vulnerabilities underscores the impact of AI tools on vulnerability discovery.
Some noteworthy vulnerabilities:
CVE-2026-49160: This vulnerability was made public a week ago. As implem
Rapid7
Patch Tuesday - June 2026
blogs_rapid7·2026-06-09·CVSS 7.8
CVE-2026-33825 [HIGH] Patch Tuesday - June 2026
Microsoft is publishing 200 vulnerabilities on June 2026 Patch Tuesday . Microsoft is not aware of exploitation in the wild for any of these vulnerabilities, and is aware of public disclosure for three. This is similar to last month’s Patch Tuesday, however several of last month’s vulnerabilities ended up on CISA KEV in the days following their publication. So far this month, Microsoft has provided patches to address 360 browser vulnerabilities, which is an order of magnitude more than has been typical in any given month over the past few years. As usual, browser vulns are not included in the Patch Tuesday count above. Indeed, the vast, and presumably sustained, uptick in the number of browser vulnerabilities has led to Microsoft no longer enumerating Chromium CVEs in the Security Update G
Bleepingcomputer
Microsoft June 2026 Patch Tuesday fixes 3 zero-day, 200 flaws
blogs_bleepingcomputer·2026-06-09·CVSS 7.8
CVE-2026-45586 [HIGH] Microsoft June 2026 Patch Tuesday fixes 3 zero-day, 200 flaws
## Microsoft June 2026 Patch Tuesday fixes 3 zero-day, 200 flaws
## Lawrence Abrams
65 Elevation of Privilege Vulnerabilities
19 Security Feature Bypass Vulnerabilities
55 Remote Code Execution Vulnerabilities
30 Information Disclosure Vulnerabilities
7 Denial of Service Vulnerabilities
27 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 flaws in Mariner, Azure HorizonDB, Microsoft Copilot, Copilot Chat, M365 Copilot, Microsoft Exchange Online, and Microsoft Graph that were fixed by Microsoft earlier this month.
There were also a massive 360 Microsoft Edge/Chromium flaws that were fixed by Google this month, which were excluded from this Patch
Crowdstrike
June 2026 Patch Tuesday: Microsoft Patches 206 Vulnerabilities Including Three Publicly Disclosed Zero-Days
blogs_crowdstrike
CVE-2026-45586 June 2026 Patch Tuesday: Microsoft Patches 206 Vulnerabilities Including Three Publicly Disclosed Zero-Days
CrowdStrike 2026 Technology Threat Landscape Report: China’s Ambitions Fuel Attacks Jun 09, 2026
June 2026 Patch Tuesday: Microsoft Patches 206 Vulnerabilities Including Three Publicly Disclosed Zero-Days Jun 09, 2026
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3 Principles to Safely Scale Agentic AI Jun 05, 2026
CrowdStrike 2026 Technology Threat Landscape Report: China’s Ambitions Fuel Attacks Jun 09, 2026
June 2026 Patch Tuesday: Microsoft Patches 206 Vulnerabilities Including Three Publicly Disclosed Zero-Days Jun 09, 2026
CrowdStrike and Zscaler Bring Continuous Identity to Zero Trust Access Jun 08, 2026
3 Principles to Safely Scale Agentic AI Jun 05, 2026
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Hel
2026-06-09
Published