HOME VULNERABILITIESCVE-2017-6517

CRITICAL

CVE-2017-6517

CWE-427Published: March 23, 2017· Updated: Jun 17, 2026

9.8

CVSS v3.1

Official Description

Microsoft Skype 7.16.0.102 contains a vulnerability that could allow an unauthenticated, remote attacker to execute arbitrary code on the targeted system. This vulnerability exists due to the way .dll files are loaded by Skype. It allows an attacker to load a .dll of the attacker's choosing that could execute arbitrary code without the user's knowledge.The specific flaw exists within the handling of DLL (api-ms-win-core-winrt-string-l1-1-0.dll) loading by the Skype.exe process.

Technical Analysis

CVE-2017-6517 can be exploited remotely over the network without requiring physical or adjacent access, significantly expanding the attack surface for threat actors.

The vulnerability requires no privileges and no user interaction, making it a prime target for automated exploitation campaigns and worm-like propagation.

A successful exploit results in complete confidentiality breach (data exposure), full integrity compromise (data manipulation), availability disruption (denial of service), with a CVSS base score of 9.8.

CVSS v3.1 Vector Breakdown

Exploitability

Attack VectorNetwork

Attack ComplexityLow

Privileges Req.None

User InteractionNone

ScopeUnchanged

Impact

ConfidentialityHigh

IntegrityHigh

AvailabilityHigh

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

Affected Vendors & Products

Microsoft1 product(s)

skype

Source: NVD CPE · 1 total CPE entries

Exploit & PoC Resources

NO KNOWN EXPLOITNo public exploit confirmed at this time

Offensive Security exploit database

GitHub PoC Search

Community PoC repositories

Rapid7 / Metasploit

Metasploit module search

Security advisories & exploits

Official NIST entry

CVE Program entry

External links open in a new tab. Always verify in a controlled environment before use.

Official Patches & Advisories

ADVISORYhttp://packetstormsecurity.com/files/141650/Skype-7.16.0.102-DLL-Hijacking.html

ADVISORYhttp://seclists.org/fulldisclosure/2017/Mar/44

ADVISORYhttp://www.securityfocus.com/bid/96969

ADVISORYhttp://packetstormsecurity.com/files/141650/Skype-7.16.0.102-DLL-Hijacking.html

ADVISORYhttp://seclists.org/fulldisclosure/2017/Mar/44

ADVISORYhttp://www.securityfocus.com/bid/96969

All References (14)

→

http://packetstormsecurity.com/files/141650/Skype-7.16.0.102-DLL-Hijacking.htmlExploit · Third Party Advisory · US Government Resource

→

http://seclists.org/fulldisclosure/2017/Mar/44Mailing List · Third Party Advisory

→

http://www.securityfocus.com/bid/96969Third Party Advisory · VDB Entry

→

http://www.securitytracker.com/id/1038209

→

https://technet.microsoft.com/security/cc308575.aspxNot Applicable

→

https://twitter.com/tiger_tigerboy/status/755332687141883904Press/Media Coverage

→

https://twitter.com/vysecurity/status/845013670103003138Press/Media Coverage

→

http://packetstormsecurity.com/files/141650/Skype-7.16.0.102-DLL-Hijacking.htmlExploit · Third Party Advisory · US Government Resource

→

http://seclists.org/fulldisclosure/2017/Mar/44Mailing List · Third Party Advisory

→

http://www.securityfocus.com/bid/96969Third Party Advisory · VDB Entry

→

http://www.securitytracker.com/id/1038209

→

https://technet.microsoft.com/security/cc308575.aspxNot Applicable

→

https://twitter.com/tiger_tigerboy/status/755332687141883904Press/Media Coverage

→

https://twitter.com/vysecurity/status/845013670103003138Press/Media Coverage

Quick Facts

CVE IDCVE-2017-6517

CVSS Score9.8 / 10

SeverityCRITICAL

WeaknessCWE-427

CISA KEVNo

Affected1 vendor(s)

PublishedMar 23, 2017

Related CVEs (CWE-427)

Recommended Actions

→Apply vendor patches immediately
→Monitor CVE-2017-6517 in threat intel feeds
→Review IDS/IPS signatures for exploitation attempts

Data sourced from NVD (NIST), CISA KEV, and EPSS (FIRST). Analysis generated by CTIWATCH.COM. CVE data is provided under the NVD usage policy.

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