How severe is CVE-2026-42913?

CVE-2026-42913 has a CVSS 3.x base score of 7.5, rated high severity. It is exploitable over network with high attack complexity, requires no privileges and user interaction. Impact on confidentiality is high, integrity high, and availability high.

Is CVE-2026-42913 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (38th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2026-42913?

CVE-2026-42913 primarily affects Microsoft Remote Desktop Client. In total, 11 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.

How do I fix CVE-2026-42913?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its high severity, prioritise patching exposed systems.

Does CVE-2026-42913 have an EU (EUVD) identifier?

Yes. CVE-2026-42913 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2026-35724.

When was CVE-2026-42913 published?

CVE-2026-42913 was published on 2026-06-09 and last updated on 2026-06-17.

CVE-2026-42913

CVE-2026-42913 is a high-severity vulnerability in Microsoft Remote Desktop Client with a CVSS 3.x base score of 7.5. It is not currently listed as actively exploited by CISA, and its EPSS exploit-prediction score is low. The underlying weakness is classified as CWE-362.

Key facts

Severity: High (CVSS 3.x base score 7.5)
EPSS exploit prediction: 0% (38th percentile)
Actively exploited: Not listed in CISA KEV
EU (EUVD) id: EUVD-2026-35724
Weakness: CWE-362
Affected product: Microsoft Remote Desktop Client
Published: 2026-06-09
Last modified: 2026-06-17

Description

Heap-based buffer overflow in Remote Desktop Client allows an unauthorized attacker to execute code over a network.

Frequently asked questions

What is CVE-2026-42913?: Heap-based buffer overflow in Remote Desktop Client allows an unauthorized attacker to execute code over a network.
How severe is CVE-2026-42913?: CVE-2026-42913 has a CVSS 3.x base score of 7.5, rated high severity. It is exploitable over network with high attack complexity, requires no privileges and user interaction. Impact on confidentiality is high, integrity high, and availability high.
Is CVE-2026-42913 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (38th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2026-42913?: CVE-2026-42913 primarily affects Microsoft Remote Desktop Client. In total, 11 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.
How do I fix CVE-2026-42913?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its high severity, prioritise patching exposed systems.
Does CVE-2026-42913 have an EU (EUVD) identifier?: Yes. CVE-2026-42913 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2026-35724.
When was CVE-2026-42913 published?: CVE-2026-42913 was published on 2026-06-09 and last updated on 2026-06-17.

References

https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-42913

Affected products (11)

cpe:2.3:a:microsoft:remote_desktop_client:*:*:*:*:*:windows:*:*
cpe:2.3:o:microsoft:windows_11_23h2:*:*:*:*:*:*:arm64:*
cpe:2.3:o:microsoft:windows_11_23h2:*:*:*:*:*:*:x64:*
cpe:2.3:o:microsoft:windows_11_24h2:*:*:*:*:*:*:arm64:*
cpe:2.3:o:microsoft:windows_11_24h2:*:*:*:*:*:*:x64:*
cpe:2.3:o:microsoft:windows_11_25h2:*:*:*:*:*:*:arm64:*
cpe:2.3:o:microsoft:windows_11_25h2:*:*:*:*:*:*:x64:*
cpe:2.3:o:microsoft:windows_11_26h1:*:*:*:*:*:*:arm64:*
cpe:2.3:o:microsoft:windows_11_26h1:*:*:*:*:*:*:x64:*
cpe:2.3:o:microsoft:windows_server_2022:*:*:*:*:-:*:x64:*
cpe:2.3:o:microsoft:windows_server_2025:*:*:*:*:*:*:x64:*

More vulnerabilities in Microsoft Remote Desktop Client

CVE-2026-42985 — High (CVSS 8.8): Heap-based buffer overflow in Remote Desktop Client allows an unauthorized attacker to execute code over a network.
CVE-2026-32157 — High (CVSS 8.8): Use after free in Remote Desktop Client allows an unauthorized attacker to execute code over a network.
CVE-2025-58718 — High (CVSS 8.8): Use after free in Remote Desktop Client allows an unauthorized attacker to execute code over a network.
CVE-2025-48817 — High (CVSS 8.8): Relative path traversal in Remote Desktop Client allows an unauthorized attacker to execute code over a network.
CVE-2025-26645 — High (CVSS 8.8): Relative path traversal in Remote Desktop Client allows an unauthorized attacker to execute code over a network.
CVE-2024-38131 — High (CVSS 8.8): Clipboard Virtual Channel Extension Remote Code Execution Vulnerability

All CVEs affecting Microsoft Remote Desktop Client →

Other CWE-362 (Race Condition) vulnerabilities

CVE-2022-27626 — Critical (CVSS 10.0): A vulnerability regarding concurrent execution using shared resource with improper synchronization ('Race Condition')…
CVE-2015-8556 — Critical (CVSS 10.0): Local privilege escalation vulnerability in the Gentoo QEMU package before 2.5.0-r1.
CVE-2014-0703 — Critical (CVSS 10.0): Cisco Wireless LAN Controller (WLC) devices 7.4 before 7.4.110.0 distribute Aironet IOS software with a race condition…
CVE-2010-1228 — Critical (CVSS 10.0): Multiple race conditions in the sandbox infrastructure in Google Chrome before 4.1.249.1036 have unspecified impact and…
CVE-2008-6598 — Critical (CVSS 10.0): Multiple race conditions in WANPIPE before 3.3.6 have unknown impact and attack vectors related to "bri restart logic."
CVE-2026-46137 — Critical (CVSS 9.8): In the Linux kernel, the following vulnerability has been resolved: mptcp: pm: ADD_ADDR rtx: fix potential…

Browse all CWE-362 (Race Condition) vulnerabilities →