How severe is CVE-2017-8493?

CVE-2017-8493 has a CVSS 3.x base score of 5.5, rated medium severity. It is exploitable over local access with low attack complexity, requires low privileges and no user interaction. Impact on confidentiality is none, integrity high, and availability none.

Is CVE-2017-8493 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (70th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2017-8493?

CVE-2017-8493 primarily affects Microsoft Windows 10. In total, 8 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.

How do I fix CVE-2017-8493?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.

When was CVE-2017-8493 published?

CVE-2017-8493 was published on 2017-06-15 and last updated on 2026-06-17.

CVE-2017-8493

CVE-2017-8493 is a medium-severity vulnerability in Microsoft Windows 10 with a CVSS 3.x base score of 5.5. 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-178.

Key facts

Severity: Medium (CVSS 3.x base score 5.5)
CVSS v2: 2.1
EPSS exploit prediction: 1% (70th percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-178
Affected product: Microsoft Windows 10
Published: 2017-06-15
Last modified: 2026-06-17

Description

Microsoft Windows 8.1 and Windows RT 8.1, Windows Server 2012 R2, Windows 10 Gold, 1511, 1607, and 1703, and Windows Server 2016 allow an attacker to set variables that are either read-only or require authentication when Windows fails to enforce case sensitivity for certain variable checks, aka "Windows Security Feature Bypass Vulnerability".

Frequently asked questions

What is CVE-2017-8493?: Microsoft Windows 8.1 and Windows RT 8.1, Windows Server 2012 R2, Windows 10 Gold, 1511, 1607, and 1703, and Windows Server 2016 allow an attacker to set variables that are either read-only or require authentication when Windows fails to enforce case sensitivity for certain variable checks, aka "Windows Security Feature Bypass Vulnerability".
How severe is CVE-2017-8493?: CVE-2017-8493 has a CVSS 3.x base score of 5.5, rated medium severity. It is exploitable over local access with low attack complexity, requires low privileges and no user interaction. Impact on confidentiality is none, integrity high, and availability none.
Is CVE-2017-8493 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (70th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2017-8493?: CVE-2017-8493 primarily affects Microsoft Windows 10. In total, 8 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.
How do I fix CVE-2017-8493?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.
When was CVE-2017-8493 published?: CVE-2017-8493 was published on 2017-06-15 and last updated on 2026-06-17.

References

Affected products (8)

cpe:2.3:o:microsoft:windows_10:-:*:*:*:*:*:*:*
cpe:2.3:o:microsoft:windows_10:1511:*:*:*:*:*:*:*
cpe:2.3:o:microsoft:windows_10:1607:*:*:*:*:*:*:*
cpe:2.3:o:microsoft:windows_10:1703:*:*:*:*:*:*:*
cpe:2.3:o:microsoft:windows_8.1:-:*:*:*:*:*:*:*
cpe:2.3:o:microsoft:windows_rt_8.1:-:*:*:*:*:*:*:*
cpe:2.3:o:microsoft:windows_server_2012:r2:*:*:*:*:*:*:*
cpe:2.3:o:microsoft:windows_server_2016:-:*:*:*:*:*:*:*

More vulnerabilities in Microsoft Windows 10

CVE-2020-1467 — Critical (CVSS 10.0): An elevation of privilege vulnerability exists when Windows improperly handles hard links. An attacker who successfully…
CVE-2021-26424 — Critical (CVSS 9.9): Windows TCP/IP Remote Code Execution Vulnerability
CVE-2021-28476 — Critical (CVSS 9.9): Windows Hyper-V Remote Code Execution Vulnerability
CVE-2021-26867 — Critical (CVSS 9.9): Windows Hyper-V Remote Code Execution Vulnerability
CVE-2020-1112 — Critical (CVSS 9.9): An elevation of privilege vulnerability exists when the Windows Background Intelligent Transfer Service (BITS) IIS…
CVE-2019-1384 — Critical (CVSS 9.9): A security feature bypass vulnerability exists where a NETLOGON message is able to obtain the session key and sign…

All CVEs affecting Microsoft Windows 10 →

Other CWE-178 vulnerabilities

CVE-2026-54763 — Critical (CVSS 10.0): Traefik is an HTTP reverse proxy and load balancer. Prior to v2.11.51, v3.6.22, and v3.7.6, Traefik's BasicAuth,…
CVE-2026-40453 — Critical (CVSS 9.9): The fix for CVE-2025-27636 added setLowerCase(true) to HttpHeaderFilterStrategy so that case-variant header names such…
CVE-2026-47323 — Critical (CVSS 9.8): Camel-CXF and Camel-Knative Message Header Injection via Missing Inbound Filtering The CXF and Knative…
CVE-2024-5699 — Critical (CVSS 9.8): In violation of spec, cookie prefixes such as `__Secure` were being ignored if they were not correctly capitalized - by…
CVE-2023-3545 — Critical (CVSS 9.8): Improper sanitisation in `main/inc/lib/fileUpload.lib.php` in Chamilo LMS <= v1.11.20 on Windows and Apache…
CVE-2022-29604 — Critical (CVSS 9.8): An issue was discovered in ONOS 2.5.1. An intent with an uppercase letter in a device ID shows the CORRUPT state, which…

Browse all CWE-178 vulnerabilities →