Cisco AnyConnect Secure Mobility Client on Windows DLL Path untrusted search path

CVSS Meta Temp Score
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CTI Interest Score
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A vulnerability was found in Cisco AnyConnect Secure Mobility Client on Windows (Network Encryption Software) (the affected version unknown). It has been classified as critical. Affected is an unknown part of the component DLL Path Handler. The manipulation with an unknown input leads to a untrusted search path vulnerability. CWE is classifying the issue as CWE-426. The product searches for critical resources using an externally-supplied search path that can point to resources that are not under the product's direct control. This is going to have an impact on confidentiality, integrity, and availability.

The weakness was presented 09/23/2015 by Google Project Zero and Yorick Koster as 41136 / CSCuv01279 as confirmed vulnerability alert (Website). The advisory is available at This vulnerability is traded as CVE-2015-6305 since 08/17/2015. The exploitability is told to be easy. Local access is required to approach this attack. A authentication is necessary for exploitation. Technical details are unknown but a public exploit is available. This vulnerability is assigned to T1574 by the MITRE ATT&CK project.

A public exploit has been developed by Google Security Research and been published even before and not after the advisory. The exploit is shared for download at It is declared as proof-of-concept. The vulnerability was handled as a non-public zero-day exploit for at least 1 days. During that time the estimated underground price was around $5k-$25k. The vulnerability scanner Nessus provides a plugin with the ID 86302 (Cisco AnyConnect Secure Mobility Client 3.x < 3.1.11004.0 / 4.x < 4.1.6020.0 Privilege Escalation), which helps to determine the existence of the flaw in a target environment. It is assigned to the family Windows.

There is no information about possible countermeasures known. It may be suggested to replace the affected object with an alternative product.

The vulnerability is also documented in the databases at Tenable (86302) and Exploit-DB (38289). See 76063 for similar entry.






CPE 2.3info

CPE 2.2info


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VulDB Meta Base Score: 7.8
VulDB Meta Temp Score: 7.4

VulDB Base Score: 7.8
VulDB Temp Score: 7.4
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Class: Untrusted search path
CWE: CWE-426
ATT&CK: T1574

Local: Yes
Remote: No

Availability: 🔍
Access: Public
Status: Proof-of-Concept
Author: Google Security Research
Download: 🔍

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Nessus ID: 86302
Nessus Name: Cisco AnyConnect Secure Mobility Client 3.x < 3.1.11004.0 / 4.x < 4.1.6020.0 Privilege Escalation
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Nessus Risk: 🔍
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Threat Intelligenceinfo

Interest: 🔍
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Recommended: no mitigation known
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08/17/2015 🔍
09/22/2015 +36 days 🔍
09/22/2015 +0 days 🔍
09/22/2015 +0 days 🔍
09/23/2015 +1 days 🔍
09/23/2015 +0 days 🔍
09/24/2015 +1 days 🔍
09/25/2015 +1 days 🔍
10/08/2015 +13 days 🔍
06/18/2022 +2445 days 🔍



Advisory: 41136 / CSCuv01279
Researcher: Google Project Zero, Yorick Koster
Status: Confirmed

CVE: CVE-2015-6305 (🔍)
SecurityTracker: 1033643
Vulnerability Center: 53296 - Cisco AnyConnect Secure Mobility Client Local Privileges Escalation via a Trojan Horse DLL, Medium
SecurityFocus: 76817

scip Labs:
See also: 🔍


Created: 09/24/2015 10:26 PM
Updated: 06/18/2022 08:47 PM
Changes: 09/24/2015 10:26 PM (65), 02/04/2018 10:14 AM (9), 06/18/2022 08:39 PM (3), 06/18/2022 08:47 PM (1)
Complete: 🔍


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