What is CVE-2017-3813?

CVE-2017-3813 is a high-severity vulnerability in Cisco Anyconnect Secure Mobility Client, classified under CWE-264. CVSS score: 7.8/10. Published 2017-02-09.

How severe is CVE-2017-3813?

High severity. CVSS v3 base score is 7.8 out of 10.

Is CVE-2017-3813 known to be exploited?

1 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.

Auth bypass in Cisco Anyconnect Secure Mobility Client

CVE-2017-3813

A vulnerability in the Start Before Logon (SBL) module of Cisco AnyConnect Secure Mobility Client Software for Windows could allow an unauthenticated, local attacker to open Internet Explorer with the privileges of the SYSTEM user. The vulnerability is due to insufficient implementation of the access controls. An attacker could exploit this vulnerability by opening the Internet Explorer browser. An exploit could allow the attacker to use Internet Explorer with the privileges of the SYSTEM user. This may allow the attacker to execute privileged commands on the targeted system. This vulnerability affects versions prior to released versions 4.4.00243 and later and 4.3.05017 and later. Cisco Bug IDs: CSCvc43976.

Published 2017-02-09 · last modified 2026-06-17.

CVSS v3 metric

CVSS v3 base score 7.8 (High). Vector: CVSS:3.0/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H.

EPSS exploit prediction

EPSS: 0.017 (77.0th percentile), scored 2026-10-19.

Low probability of exploitation in the next 30 days, but still tracked. 77th percentile — 77.0% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS over last 30 days · oldest: 0.017 · newest: 0.017 · change: 0.000

Affected products

Cisco Anyconnect Secure Mobility Client — versions 4.0.00048, 4.0.00051, 4.0.00052
Cisco Anyconnect Secure Mobility Client Software For Windows Versions Prior To Released 4.4.00243 And Later 4.3.05017 Later. — versions Cisco AnyConnect Secure Mobility Client Software for Windows Versions prior to released versions 4.4.00243 and later and 4.3.05017 and later.

Weakness classification (CWE)

Public proof-of-concept exploits

ARPSyndicate/cvemon

References

tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-20170208… (Vendor Advisory)
www.exploit-db.com/exploits/41476/ (exploit)
www.securitytracker.com/id/1037796 (vdb-entry)
www.securityfocus.com/bid/96145 (vdb-entry)

Frequently asked questions

What is CVE-2017-3813?: CVE-2017-3813 is a high-severity vulnerability in Cisco Anyconnect Secure Mobility Client, classified under CWE-264. CVSS score: 7.8/10. Published 2017-02-09.
How severe is CVE-2017-3813?: High severity. CVSS v3 base score is 7.8 out of 10.
Is CVE-2017-3813 known to be exploited?: 1 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.