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Vulnerability record · CVE-2011-2040 · published 2 June 2011

CVE-2011-2040: Cisco anyconnect secure mobility client improper input validation vulnerability

Cisco · Anyconnect Secure Mobility Client

The helper application in Cisco AnyConnect Secure Mobility Client (formerly AnyConnect VPN Client) before 2.5.3041, and 3.0.x before 3.0.629, on Linux and Mac OS X downloads a client executable file (vpndownloader.exe) without verifying its authenticity, which allows remote attackers to execute arbitrary code via the url property to a Java applet, aka Bug ID CSCsy05934.

9.3 CVSS 2.0 High EPSS 11% · top 4.3% CWE-20 · Improper input validation
9.3CVSS 2.0 base score
11%EPSS exploitation probability, 30 days
NoNot in CISA KEV
1Affected product versions listed by NVD
10References
16 Jun 2026Last modified by NVD

Description

The helper application in Cisco AnyConnect Secure Mobility Client (formerly AnyConnect VPN Client) before 2.5.3041, and 3.0.x before 3.0.629, on Linux and Mac OS X downloads a client executable file (vpndownloader.exe) without verifying its authenticity, which allows remote attackers to execute arbitrary code via the url property to a Java applet, aka Bug ID CSCsy05934.

AV:N/AC:M/Au:N/C:C/I:C/A:C

Affected products

1 vulnerable configurations from NVD's CPE data, grouped by vendor and product.

References

LinkTags
http://labs.idefense.com/intelligence/vulnerabilities/display.php?id=910
http://www.cisco.com/en/US/products/products_security_advisory09186a0080b80123.shtml Vendor Advisory
http://www.kb.cert.org/vuls/id/490097 US Government Resource
http://www.securitytracker.com/id?1025591
https://exchange.xforce.ibmcloud.com/vulnerabilities/67739
http://labs.idefense.com/intelligence/vulnerabilities/display.php?id=910
http://www.cisco.com/en/US/products/products_security_advisory09186a0080b80123.shtml Vendor Advisory
http://www.kb.cert.org/vuls/id/490097 US Government Resource
http://www.securitytracker.com/id?1025591
https://exchange.xforce.ibmcloud.com/vulnerabilities/67739

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Related vulnerabilities

Same products first, then exploited flaws of the same weakness class.

7.8CVE-2020-3433Cisco AnyConnect Windows client DLL hijacking via IPC channelCisco AnyConnect Secure Mobility Client for Windows fails to properly validate resources loaded at run time, allowing a DLL hijacking attack through …KEVEPSS 10%analysed6.5CVE-2020-3153Cisco AnyConnect Windows Installer Path Handling Privilege EscalationThe Cisco AnyConnect Secure Mobility Client for Windows installer mishandles directory paths, letting an authenticated local user copy attacker-suppl…KEVEPSS 28%analysed9.3CVE-2012-3088Cisco anyconnect secure mobility client vulnerabilityCisco AnyConnect Secure Mobility Client 3.1.x before 3.1.00495, and 3.2.x, does not check whether an HTTP request originally contains ScanSafe header…EPSS 1.8%9.3CVE-2012-2493Cisco anyconnect secure mobility client improper input validation vulnerabilityThe VPN downloader implementation in the WebLaunch feature in Cisco AnyConnect Secure Mobility Client 2.x before 2.5 MR6 on Windows, and 2.x before 2…EPSS 3.9%7.8CVE-2023-20178Cisco anyconnect secure mobility client incorrect default permissions vulnerabilityA vulnerability in the client update process of Cisco AnyConnect Secure Mobility Client Software for Windows and Cisco Secure Client Software for Win…EPSS 5.4%7.8CVE-2021-40124Cisco anyconnect secure mobility client improper privilege management vulnerabilityA vulnerability in the Network Access Manager (NAM) module of Cisco AnyConnect Secure Mobility Client for Windows could allow an authenticated, local…EPSS 0.24%7.8CVE-2021-1426Cisco anyconnect secure mobility client uncontrolled search path element vulnerabilityMultiple vulnerabilities in the install, uninstall, and upgrade processes of Cisco AnyConnect Secure Mobility Client for Windows could allow an authe…EPSS 0.25%7.8CVE-2021-1427Cisco anyconnect secure mobility client uncontrolled search path element vulnerabilityMultiple vulnerabilities in the install, uninstall, and upgrade processes of Cisco AnyConnect Secure Mobility Client for Windows could allow an authe…EPSS 0.25%

Source: NIST National Vulnerability Database (record CVE-2011-2040), CISA KEV, FIRST EPSS (scores of 2026-09-27). This page is refreshed as NVD updates the record.