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CVE-2017-8550

41
FAUCET Score

CVE-2017-8550 is a remote code execution vulnerability in Microsoft Skype for Business, stemming from insufficient sanitization of specially crafted content. With a CVSS score of 5.4 (Medium), this vulnerability requires high attack complexity and has the potential for limited confidentiality and integrity impact, but no availability impact. While no active exploitation is confirmed and no public exploit code exists for RCE, a Cross-Site Scripting exploit for Skype for Business 2016 is available on ExploitDB. The vulnerability has garnered minimal community discussion and media coverage.

Impacted Technologies

VendorProductVersion(s)CPE
2016CPE matchmatch criteria
cpe:2.3:a:microsoft:office:2016:*:*:*:click-to-run:*:*:*

CVSS Data

CVSS version used by this source: 3.0

5.4MEDIUM

CVSS:3.0/AV:N/AC:H/PR:N/UI:N/S:C/C:L/I:L/A:N

Attack Vector
NETWORK
Attack Complexity
HIGH
Privileges Required
NONE
User Interaction
NONE
Scope
CHANGED
Confidentiality Impact
LOW
Integrity Impact
LOW
Availability Impact
NONE
Exploitability Score
2.2
Impact Score
2.7
CvssVersion
3.0

Exploit Intelligence

EPSS Score
22.43%
Probability of exploitation in next 30 days
EPSS Percentile
97.4%
Percentile rank of EPSS score among Peer Group
As of 2026-07-27
Model: v2026.06.15
ExploitDB: EDB-42316 · Jul 12, 2017
This CVE's current EPSS score of 0.2243 is in the 98th percentile among its peer group of 19,955 CVEs.

Social Chatter

The average CVE in this peer group has 0.0 Twitter, 0.0 Reddit, 0.0 Bluesky, 0.0 Mastodon, and 0.2 GitHub mentions.

Media Mentions

No media coverage found for this CVE.

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

Remediation

Patch Available

Vendor Patches (3)

microsoftpatch availablevia nvd_reference
View patch
microsoftpatch availablevia msrc
Product: Microsoft Office 2016 Click-to-Run (C2R) for 32-bit editions
microsoftpatch availablevia msrc
Product: Microsoft Office 2016 Click-to-Run (C2R) for 64-bit editions

Vendor Advisories (1)

microsoft2017-Jun/CVE-2017-8550Important

Skype for Business Remote Code Execution Vulnerability

Jun 13, 2017

References

portal.msrc.microsoft.com / en-US/security-guidance/advisory/CVE-2017-8550
PatchVendor Advisory
exploit-db.com / exploits/42316
ExploitThird Party AdvisoryVDB Entry
securityfocus.com / bid/98916
Third Party AdvisoryVDB Entry