Code execution in Cisco AnyConnect Secure Mobility Client

Published: 2020-11-05
Risk Low
Patch available NO
Number of vulnerabilities 1
CVE ID CVE-2020-3556
Exploitation vector Local
Public exploit N/A
Vulnerable software
Cisco AnyConnect Secure Mobility Client
Client/Desktop applications / Other client software

Vendor Cisco Systems, Inc

Security Advisory

This security advisory describes one low risk vulnerability.

1) Input validation error

Risk: Low

CVSSv3: 6.7 [CVSS:3.0/AV:L/AC:L/PR:L/UI:R/S:U/C:H/I:H/A:H/E:U/RL:U/RC:C] [PCI]

CVE-ID: CVE-2020-3556

CWE-ID: CWE-20 - Improper Input Validation

Exploit availability: No


The vulnerability allows a local user to execute arbitrary code on the target system.

The vulnerability exists due to a lack of authentication to the interprocess communication (IPC) channel listener. A local user can send specially crafted IPC messages to the AnyConnect client IPC listener and cause the targeted AnyConnect user to execute a script.


Cybersecurity Help is currently unaware of any official solution to address this vulnerability.

Vulnerable software versions

Cisco AnyConnect Secure Mobility Client: 4.9(3052), 98.145(86)

CPE External links

Q & A

Can this vulnerability be exploited remotely?

No. This vulnerability can be exploited locally. The attacker should have authentication credentials and successfully authenticate on the system.

Is there known malware, which exploits this vulnerability?

No. We are not aware of malware exploiting this vulnerability.