CVE-2023-21726

CVE-2023-21726 is a high-severity vulnerability in Microsoft Windows 10 1607 with a CVSS 3.x base score of 7.8. 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-257.

Key facts

• Severity: High (CVSS 3.x base score 7.8)
• EPSS exploit prediction: 0% (38th percentile)
• Actively exploited: Not listed in CISA KEV
• Weakness: CWE-257
• Affected product: Microsoft Windows 10 1607
• Published: 2023-01-10
• Last modified: 2026-06-17

Description

Windows Credential Manager User Interface Elevation of Privilege Vulnerability

Frequently asked questions

What is CVE-2023-21726?

Windows Credential Manager User Interface Elevation of Privilege Vulnerability

How severe is CVE-2023-21726?

CVE-2023-21726 has a CVSS 3.x base score of 7.8, rated high severity. It is exploitable over local access with low attack complexity, requires low privileges and no user interaction. Impact on confidentiality is high, integrity high, and availability high.

Is CVE-2023-21726 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-2023-21726?

CVE-2023-21726 primarily affects Microsoft Windows 10 1607. In total, 31 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.

How do I fix CVE-2023-21726?

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.

When was CVE-2023-21726 published?

CVE-2023-21726 was published on 2023-01-10 and last updated on 2026-06-17.

References

• https://msrc.microsoft.com/update-guide/vulnerability/CVE-2023-21726

Affected products (31)

• cpe:2.3:o:microsoft:windows_10_1607:-:*:*:*:*:*:x64:*
• cpe:2.3:o:microsoft:windows_10_1607:-:*:*:*:*:*:x86:*
• cpe:2.3:o:microsoft:windows_10_1809:-:*:*:*:*:*:arm64:*
• cpe:2.3:o:microsoft:windows_10_1809:-:*:*:*:*:*:x64:*
• cpe:2.3:o:microsoft:windows_10_1809:-:*:*:*:*:*:x86:*
• cpe:2.3:o:microsoft:windows_10_20h2:-:*:*:*:*:*:arm64:*
• cpe:2.3:o:microsoft:windows_10_20h2:-:*:*:*:*:*:x64:*
• cpe:2.3:o:microsoft:windows_10_20h2:-:*:*:*:*:*:x86:*
• cpe:2.3:o:microsoft:windows_10_21h2:-:*:*:*:*:*:arm64:*
• cpe:2.3:o:microsoft:windows_10_21h2:-:*:*:*:*:*:x64:*
• cpe:2.3:o:microsoft:windows_10_21h2:-:*:*:*:*:*:x86:*
• cpe:2.3:o:microsoft:windows_10_22h2:-:*:*:*:*:*:arm64:*
• cpe:2.3:o:microsoft:windows_10_22h2:-:*:*:*:*:*:x64:*
• cpe:2.3:o:microsoft:windows_10_22h2:-:*:*:*:*:*:x86:*
• cpe:2.3:o:microsoft:windows_11_21h2:-:*:*:*:*:*:arm64:*
• cpe:2.3:o:microsoft:windows_11_21h2:-:*:*:*:*:*:x64:*
• cpe:2.3:o:microsoft:windows_11_22h2:-:*:*:*:*:*:arm64:*
• cpe:2.3:o:microsoft:windows_11_22h2:-:*:*:*:*:*:x64:*
• cpe:2.3:o:microsoft:windows_7:-:sp1:*:*:*:*:x64:*
• cpe:2.3:o:microsoft:windows_7:-:sp1:*:*:*:*:x86:*
• cpe:2.3:o:microsoft:windows_8.1:-:*:*:*:*:*:x64:*
• cpe:2.3:o:microsoft:windows_8.1:-:*:*:*:*:*:x86:*
• cpe:2.3:o:microsoft:windows_rt_8.1:-:*:*:*:*:*:*:*
• cpe:2.3:o:microsoft:windows_server_2008:-:sp2:*:*:*:*:x64:*
• cpe:2.3:o:microsoft:windows_server_2008:-:sp2:*:*:*:*:x86:*
• cpe:2.3:o:microsoft:windows_server_2008:r2:sp1:*:*:*:*:x64:*
• cpe:2.3:o:microsoft:windows_server_2012:-:*:*:*:*:*:*:*
• cpe:2.3:o:microsoft:windows_server_2012:r2:*:*:*:*:*:*:*
• cpe:2.3:o:microsoft:windows_server_2016:-:*:*:*:*:*:*:*
• cpe:2.3:o:microsoft:windows_server_2019:-:*:*:*:*:*:*:*
• cpe:2.3:o:microsoft:windows_server_2022:-:*:*:*:*:*:*:*

More vulnerabilities in Microsoft Windows 10 1607

• CVE-2026-47291 — Critical (CVSS 9.8): Integer overflow or wraparound in Windows HTTP.sys allows an unauthorized attacker to execute code over a network.
• CVE-2026-44815 — Critical (CVSS 9.8): Stack-based buffer overflow in Windows DHCP Client allows an unauthorized attacker to execute code over a network.
• CVE-2026-33824 — Critical (CVSS 9.8): Double free in Windows IKE Extension allows an unauthorized attacker to execute code over a network.
• CVE-2025-60724 — Critical (CVSS 9.8): Heap-based buffer overflow in Microsoft Graphics Component allows an unauthorized attacker to execute code over a…
• CVE-2025-53766 — Critical (CVSS 9.8): Heap-based buffer overflow in Windows GDI+ allows an unauthorized attacker to execute code over a network.
• CVE-2025-47981 — Critical (CVSS 9.8): Heap-based buffer overflow in Windows SPNEGO Extended Negotiation allows an unauthorized attacker to execute code over…

All CVEs affecting Microsoft Windows 10 1607 →

Other CWE-257 vulnerabilities

• CVE-2025-8095 — Critical (CVSS 9.1): The OECH1 prefix encoding is intended to obfuscate values across the OpenEdge platform.  It has been identified as…
• CVE-2025-8904 — High (CVSS 8.5): Amazon EMR Secret Agent creates a keytab file containing Kerberos credentials. This file is stored in the /tmp/…
• CVE-2025-34180 — High (CVSS 8.4): NetSupport Manager < 14.12.0001 relies on a shared Gateway Key for authentication between Manager/Control, Client,…
• CVE-2025-6996 — High (CVSS 8.4): Improper use of encryption in the agent of Ivanti Endpoint Manager before version 2024 SU3 and 2022 SU8 Security Update…
• CVE-2025-6995 — High (CVSS 8.4): Improper use of encryption in the agent of Ivanti Endpoint Manager before version 2024 SU3 and 2022 SU8 Security Update…
• CVE-2016-15058 — High (CVSS 8.1): Hirschmann HiLCOS Classic Platform switches Classic L2E, L2P, L3E, L3P versions prior to 09.0.06 and Classic L2B prior…

Browse all CWE-257 vulnerabilities →