CVE-2017-3813

HIGH

Cisco AnyConnect - Privilege Escalation

Title source: llm
STIX 2.1

Exploitation Summary

EIP tracks 1 public exploit for CVE-2017-3813. PoCs published by Pcchillin.

AI-analyzed exploit summary This exploit describes a manual local privilege escalation (LPE) technique in Cisco AnyConnect Start Before Logon (SBL) by leveraging a UI interaction flaw to launch a command prompt with elevated privileges. It involves specific key combinations and navigation steps to bypass intended restrictions.

Description

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.

Exploits (1)

exploitdb WRITEUP
by Pcchillin · textlocalwindows
https://www.exploit-db.com/exploits/41476

This exploit describes a manual local privilege escalation (LPE) technique in Cisco AnyConnect Start Before Logon (SBL) by leveraging a UI interaction flaw to launch a command prompt with elevated privileges. It involves specific key combinations and navigation steps to bypass intended restrictions.

Classification
Writeup 90%
Attack Type
Lpe
Complexity
Trivial
Reliability
Reliable
Target: Cisco AnyConnect Secure Mobility Client 4.3.04027 and earlier
Auth required
Prerequisites: Physical or console access to the target system · Cisco AnyConnect installed with SBL enabled
devstral-2 · analyzed Feb 16, 2026 Full analysis →

References (4)

Core 4
Core References
Exploit, Third Party Advisory exploit x_refsource_exploit-db
https://www.exploit-db.com/exploits/41476/
Third Party Advisory, VDB Entry vdb-entry x_refsource_sectrack
http://www.securitytracker.com/id/1037796
Third Party Advisory, VDB Entry vdb-entry x_refsource_bid
http://www.securityfocus.com/bid/96145

Scores

CVSS v3 7.8
EPSS 0.0171
EPSS Percentile 74.4%
Attack Vector LOCAL
CVSS:3.0/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

Details

CWE
CWE-264 CWE-862
Status published
Products (26)
cisco/anyconnect_secure_mobility_client 4.0.00048
cisco/anyconnect_secure_mobility_client 4.0.00051
cisco/anyconnect_secure_mobility_client 4.0.00052
cisco/anyconnect_secure_mobility_client 4.0.00057
cisco/anyconnect_secure_mobility_client 4.0.00061
cisco/anyconnect_secure_mobility_client 4.1.00028
cisco/anyconnect_secure_mobility_client 4.1.02011
cisco/anyconnect_secure_mobility_client 4.1.04011
cisco/anyconnect_secure_mobility_client 4.1.06013
cisco/anyconnect_secure_mobility_client 4.1.06020
... and 16 more
Published Feb 09, 2017
Tracked Since Feb 18, 2026