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CVE-2017-6638

20
FAUCET Score

CVE-2017-6638 is a local privilege escalation vulnerability in Cisco AnyConnect Secure Mobility Client for Windows versions prior to 4.4.02034. It allows an authenticated, local attacker to execute arbitrary code with SYSTEM privileges by exploiting incomplete input validation during DLL loading. With a CVSS score of 7.8 (HIGH), this vulnerability requires valid user credentials and local access to the affected system. There is no known public exploit code (Metasploit, Nuclei, ExploitDB) and no evidence of active exploitation or significant community discussion.

Impacted Technologies

VendorProductVersion(s)CPE
<= 4.4.00243CPE matchmatch criteria
cpe:2.3:a:cisco:anyconnect_secure_mobility_client:*:*:*:*:*:*:*:*

CVSS Data

CVSS version used by this source: 3.0

7.8HIGH

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

Attack Vector
LOCAL
Attack Complexity
LOW
Privileges Required
LOW
User Interaction
NONE
Scope
UNCHANGED
Confidentiality Impact
HIGH
Integrity Impact
HIGH
Availability Impact
HIGH
Exploitability Score
1.8
Impact Score
5.9
CvssVersion
3.0

Exploit Intelligence

EPSS Score
0.37%
Probability of exploitation in next 30 days
EPSS Percentile
29.7%
Percentile rank of EPSS score among Peer Group
As of 2026-07-27
Model: v2026.06.15
This CVE's current EPSS score of 0.0037 is in the 68th percentile among its peer group of 17,070 CVEs.

Social Chatter

No social media mentions found for this CVE.

The average CVE in this peer group has 0.0 Twitter, 0.1 Reddit, 0.2 Bluesky, 0.1 Mastodon, and 0.2 GitHub mentions.

Media Mentions

No media coverage found for this CVE.

The average CVE in this peer group has 0.3 InfoSec Media, 0.0 Vendor Blog, and 0.0 Security Researcher mentions.

Remediation

Vendor Patches (1)

ciscovendor investigatingvia nvd_reference
View patch

References

tools.cisco.com / security/center/content/CiscoSecurityAdvisory/cisco-sa-20170607-anyconnect
Vendor Advisory
securityfocus.com / bid/98938
Third Party AdvisoryVDB Entry
securitytracker.com / id/1038627