How severe is CVE-2011-2040?

CVE-2011-2040 has a CVSS 2.0 base score of 9.3, rated critical severity.

Is CVE-2011-2040 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 11% (95th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2011-2040?

CVE-2011-2040 primarily affects Cisco Anyconnect Secure Mobility Client. In total, 25 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.

How do I fix CVE-2011-2040?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its critical severity, prioritise patching exposed systems.

When was CVE-2011-2040 published?

CVE-2011-2040 was published on 2011-06-02 and last updated on 2026-06-16.

CVE-2011-2040

CVE-2011-2040 is a critical-severity vulnerability in Cisco Anyconnect Secure Mobility Client with a CVSS 2.0 base score of 9.3. Its EPSS exploit-prediction score of 11% places it in the 95th percentile, indicating an elevated likelihood of exploitation. The underlying weakness is classified as CWE-20.

Key facts

Severity: Critical (CVSS 2.0 base score 9.3)
EPSS exploit prediction: 11% (95th percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-20
Affected product: Cisco Anyconnect Secure Mobility Client
Published: 2011-06-02
Last modified: 2026-06-16

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.

Frequently asked questions

What is CVE-2011-2040?: 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.
How severe is CVE-2011-2040?: CVE-2011-2040 has a CVSS 2.0 base score of 9.3, rated critical severity.
Is CVE-2011-2040 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 11% (95th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2011-2040?: CVE-2011-2040 primarily affects Cisco Anyconnect Secure Mobility Client. In total, 25 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.
How do I fix CVE-2011-2040?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its critical severity, prioritise patching exposed systems.
When was CVE-2011-2040 published?: CVE-2011-2040 was published on 2011-06-02 and last updated on 2026-06-16.

References

Affected products (25)

cpe:2.3:a:cisco:anyconnect_secure_mobility_client:*:*:*:*:*:*:*:*
cpe:2.3:a:cisco:anyconnect_secure_mobility_client:2.0:*:*:*:*:*:*:*
cpe:2.3:a:cisco:anyconnect_secure_mobility_client:2.1:*:*:*:*:*:*:*
cpe:2.3:a:cisco:anyconnect_secure_mobility_client:2.2:*:*:*:*:*:*:*
cpe:2.3:a:cisco:anyconnect_secure_mobility_client:2.2.128:*:*:*:*:*:*:*
cpe:2.3:a:cisco:anyconnect_secure_mobility_client:2.2.133:*:*:*:*:*:*:*
cpe:2.3:a:cisco:anyconnect_secure_mobility_client:2.2.136:*:*:*:*:*:*:*
cpe:2.3:a:cisco:anyconnect_secure_mobility_client:2.2.140:*:*:*:*:*:*:*
cpe:2.3:a:cisco:anyconnect_secure_mobility_client:2.3:*:*:*:*:*:*:*
cpe:2.3:a:cisco:anyconnect_secure_mobility_client:2.3.185:*:*:*:*:*:*:*
cpe:2.3:a:cisco:anyconnect_secure_mobility_client:2.3.254:*:*:*:*:*:*:*
cpe:2.3:a:cisco:anyconnect_secure_mobility_client:2.3.2016:*:*:*:*:*:*:*
cpe:2.3:a:cisco:anyconnect_secure_mobility_client:2.4:*:*:*:*:*:*:*
cpe:2.3:a:cisco:anyconnect_secure_mobility_client:2.4.0202:*:*:*:*:*:*:*
cpe:2.3:a:cisco:anyconnect_secure_mobility_client:2.4.1012:*:*:*:*:*:*:*
cpe:2.3:a:cisco:anyconnect_secure_mobility_client:2.5:*:*:*:*:*:*:*
cpe:2.3:a:cisco:anyconnect_secure_mobility_client:2.5.1025:*:*:*:*:*:*:*
cpe:2.3:a:cisco:anyconnect_secure_mobility_client:2.5.2001:*:*:*:*:*:*:*
cpe:2.3:a:cisco:anyconnect_secure_mobility_client:2.5.2006:*:*:*:*:*:*:*
cpe:2.3:a:cisco:anyconnect_secure_mobility_client:2.5.2010:*:*:*:*:*:*:*
cpe:2.3:a:cisco:anyconnect_secure_mobility_client:2.5.2011:*:*:*:*:*:*:*
cpe:2.3:a:cisco:anyconnect_secure_mobility_client:2.5.2014:*:*:*:*:*:*:*
cpe:2.3:a:cisco:anyconnect_secure_mobility_client:2.5.2017:*:*:*:*:*:*:*
cpe:2.3:a:cisco:anyconnect_secure_mobility_client:2.5.2018:*:*:*:*:*:*:*
cpe:2.3:a:cisco:anyconnect_secure_mobility_client:3.0:*:*:*:*:*:*:*

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