CVE-2017-8537

Exp

The Microsoft Malware Protection Engine running on Microsoft Forefront and Microsoft Defender on Microsoft Windows Server 2008 SP2 and R2 SP1, Windows 7 SP1, Windows 8.1, Windows Server 2012 Gold and R2, Windows RT 8.1, Windows 10 Gold, 1511, 1607, and 1703, and Windows Server 2016, Microsoft Exchange Server 2013 and 2016, does not properly scan a specially crafted file leading to denial of service. aka "Microsoft Malware Protection Engine Denial of Service Vulnerability", a different vulnerability than CVE-2017-8535, CVE-2017-8536, CVE-2017-8539, and CVE-2017-8542.

Published: 2017-05-26 Last update: 2026-05-13 Assigner: [email protected] Source: [email protected]
NVD Status：Modified，CVE State: published
View at NVD, CVE.org, EUVD

CVE-2017-8537 is rated High Exploit Risk (69.4/100): CVSS Medium severity, with medium exploitation likelihood (EPSS 4.95%). 1 public exploit reference(s) are indexed (Exploit-DB). EPSS rose +1.17% over the last day, indicating growing attacker interest. Public exploits are available—assess exposure, apply mitigations, and prioritize patching.

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

Public exploit references (Exploit-DB) for CVE-2017-8537

EDB-ID Source Kind Published Link
42081 exploit_db edb 2017-05-29 Exploit-DB ↗

Exploit prediction scoring system (EPSS) score for CVE-2017-8537

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 2025-11-21 3.79% 4.95% +1.17%
2 2025-11-18 4.95% 3.79% -1.17%
3 2025-03-30 — 4.95% —

Full EPSS history (10 records total)

Common vulnerability scoring system (CVSS) metrics for CVE-2017-8537

CVSS metrics for this CVE.

Base score Version Severity Vector Exploitability Impact Score source
5.5 3.1 MEDIUM
CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H Click to expand
Attack vector (AV:L)
They already need access on the box, or another person has to do something wrong; it’s not a remote drive-by.
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:R)
A real person has to do something—click, install, enable—otherwise it doesn’t land.
Scope (S:U)
Damage stays in the same “trust bubble” as the broken component—no big spill into unrelated systems.
Confidentiality (C:N)
Doesn’t really leak secrets in a meaningful way.
Integrity (I:N)
Data isn’t meaningfully altered or forged.
Availability (A:H)
Could take the service down hard or make it unusable for people who depend on it.
 1.8 3.6 [email protected]
4.3 2.0 MEDIUM
AV:N/AC:M/Au:N/C:N/I:N/A:P Click to expand
Access vector (AV:N)
Can be exploited remotely over network reachability.
Access complexity (AC:M)
Exploitation needs some favorable conditions, but not exceptional ones.
Authentication (AU:N)
No authentication is required.
Confidentiality impact (C:N)
No confidentiality impact.
Integrity impact (I:N)
No integrity impact.
Availability impact (A:P)
Partial availability impact.
 8.6 2.9 [email protected]

Weakness enumeration for CVE-2017-8537

Affected software / configurations for CVE-2017-8537

Vendor Product Version Raw CPE
microsoft windows_defender — cpe:2.3:a:microsoft:windows_defender:-:*:*:*:*:*:*:*
microsoft endpoint_protection — cpe:2.3:a:microsoft:endpoint_protection:-:*:*:*:*:*:*:*
microsoft exchange_server 2013 cpe:2.3:a:microsoft:exchange_server:2013:-:*:*:*:*:*:*
microsoft exchange_server 2016 cpe:2.3:a:microsoft:exchange_server:2016:-:*:*:*:*:*:*
microsoft forefront_endpoint_protection — cpe:2.3:a:microsoft:forefront_endpoint_protection:-:*:*:*:*:*:*:*
microsoft forefront_endpoint_protection 2010 cpe:2.3:a:microsoft:forefront_endpoint_protection:2010:*:*:*:*:*:*:*
microsoft security_essentials — cpe:2.3:a:microsoft:security_essentials:-:*:*:*:*:*:*:*
microsoft system_center_endpoint_protection — cpe:2.3:a:microsoft:system_center_endpoint_protection:-:*:*:*:*:*:*:*
microsoft windows_intune_endpoint_protection — cpe:2.3:a:microsoft:windows_intune_endpoint_protection:*:*:*:*:*:*:*:*

References for CVE-2017-8537

cvelogic Threat Intelligence