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CVE-2017-8537

37
FAUCET Score

CVE-2017-8537 is a denial-of-service vulnerability in the Microsoft Malware Protection Engine, affecting various Microsoft products including Forefront, Defender, Exchange Server, and multiple Windows operating systems. The vulnerability arises from improper scanning of specially crafted files, which can lead to a system crash. Rated with a CVSS score of 5.5 (Medium), this vulnerability has a local attack vector and requires user interaction (e.g., opening a malicious file). A successful exploit would result in a denial of service, impacting system availability. While not listed on the CISA KEV catalog, exploit code for multiple crashes related to malformed file scanning has been published on ExploitDB. The vulnerability has garnered significant community discussion and media coverage, indicating awareness and potential for exploitation, though active exploitation is not confirmed.

Impacted Technologies

VendorProductVersion(s)CPE
Range not provided by sourceCPE matchmatch criteria
cpe:2.3:a:microsoft:windows_defender:-:*:*:*:*:*:*:*
Range not provided by sourceCPE matchmatch criteria
cpe:2.3:a:microsoft:endpoint_protection:-:*:*:*:*:*:*:*
2013CPE matchmatch criteria
cpe:2.3:a:microsoft:exchange_server:2013:-:*:*:*:*:*:*
2016CPE matchmatch criteria
cpe:2.3:a:microsoft:exchange_server:2016:-:*:*:*:*:*:*
Range not provided by sourceCPE matchmatch criteria
cpe:2.3:a:microsoft:forefront_endpoint_protection:-:*:*:*:*:*:*:*

CVSS Data

CVSS version used by this source: 3.1

5.5MEDIUM

CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H

Attack Vector
LOCAL
Attack Complexity
LOW
Privileges Required
NONE
User Interaction
REQUIRED
Scope
UNCHANGED
Confidentiality Impact
NONE
Integrity Impact
NONE
Availability Impact
HIGH
Exploitability Score
1.8
Impact Score
3.6
CvssVersion
3.1

Exploit Intelligence

EPSS Score
16.83%
Probability of exploitation in next 30 days
EPSS Percentile
96.7%
Percentile rank of EPSS score among Peer Group
As of 2026-07-25
Model: v2026.06.15
ExploitDB: EDB-42081 · May 29, 2017
This CVE's current EPSS score of 0.1683 is in the 99th percentile among its peer group of 5,758 CVEs.

Social Chatter

The average CVE in this peer group has 0.0 Twitter, 0.0 Reddit, 0.0 Bluesky, 0.0 Mastodon, and 0.1 GitHub mentions.

Media Mentions

The average CVE in this peer group has 0.1 InfoSec Media, 0.0 Vendor Blog, and 0.0 Security Researcher mentions.

Remediation

Patch Available

Vendor Patches (1)

microsoftpatch availablevia nvd_reference
View patch

Vendor Advisories (1)

microsoft2017-May/CVE-2017-8537Important

Microsoft Malware Protection Engine Denial of Service Vulnerability

May 9, 2017

References

portal.msrc.microsoft.com / en-US/security-guidance/advisory/CVE-2017-8537
PatchVendor Advisory
exploit-db.com / exploits/42081
Third Party AdvisoryVDB Entry
securityfocus.com / bid/98705
Third Party AdvisoryVDB Entry
securitytracker.com / id/1038571
Third Party AdvisoryVDB Entry