CVE-2021-1366: high-severity vulnerability in Cisco AnyConnect Secure Mobility Client
Cisco AnyConnect Secure Mobility Client for Windows with VPN Posture (HostScan) Module DLL Hijacking Vulnerability
Published · Updated
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21Vexday Risk Score
No sign of exploitation. No public exploitation artifact known so far.
ssvc Trackcvss 7.8epss 1.3%
A vulnerability in the interprocess communication (IPC) channel of Cisco AnyConnect Secure Mobility Client for Windows could allow an authenticated, local attacker to perform a DLL hijacking attack on an affected device if the VPN Posture (HostScan) Module is installed on the AnyConnect client. This vulnerability is due to insufficient validation of resources that are loaded by the application at run time. An attacker could exploit this vulnerability by sending a crafted IPC message to the AnyConnect process. A successful exploit could allow the attacker to execute arbitrary code on the affected machine with SYSTEM privileges. To exploit this vulnerability, the attacker needs valid credentials on the Windows system.
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
Affected products
Cisco · Cisco AnyConnect Secure Mobility ClientRelated CVEs — Cisco AnyConnect Secure Mobility Client
In the same product, most dangerous first.
CVE-2020-3153MEDIUMCisco AnyConnect Secure Mobility Client for Windows Uncontrolled Search Path VulnerabilityEPSS 28.5%KEVCVE-2020-3433HIGHCisco AnyConnect Secure Mobility Client for Windows DLL Hijacking VulnerabilityEPSS 10.0%KEVCVE-2019-1853MEDIUMCisco AnyConnect Secure Mobility Client for Linux Out-of-Bounds Memory Read VulnerabilityEPSS 1.6%CVE-2021-1496HIGHCisco AnyConnect Secure Mobility Client for Windows DLL and Executable Hijacking VulnerabilitiesEPSS 0.5%CVE-2020-3434MEDIUMCisco AnyConnect Secure Mobility Client for Windows Denial of Service VulnerabilityEPSS 0.5%CVE-2020-3556HIGHCisco AnyConnect Secure Mobility Client Arbitrary Code Execution VulnerabilityEPSS 0.4%