How severe is CVE-2011-2039?

CVE-2011-2039 has a CVSS 2.0 base score of 7.6, rated high severity.

Is CVE-2011-2039 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 70% (99th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2011-2039?

CVE-2011-2039 primarily affects Cisco Anyconnect Secure Mobility Client. In total, 8 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.

How do I fix CVE-2011-2039?

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

When was CVE-2011-2039 published?

CVE-2011-2039 was published on 2011-06-02 and last updated on 2026-06-16.

CVE-2011-2039

CVE-2011-2039 is a high-severity vulnerability in Cisco Anyconnect Secure Mobility Client with a CVSS 2.0 base score of 7.6. Its EPSS exploit-prediction score of 70% places it in the 99th percentile, indicating an elevated likelihood of exploitation. The underlying weakness is classified as CWE-20.

Key facts

Severity: High (CVSS 2.0 base score 7.6)
EPSS exploit prediction: 70% (99th 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 2.3.185 on Windows, and on Windows Mobile, 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 certain ActiveX control in vpnweb.ocx, aka Bug ID CSCsy00904.

Frequently asked questions

What is CVE-2011-2039?: The helper application in Cisco AnyConnect Secure Mobility Client (formerly AnyConnect VPN Client) before 2.3.185 on Windows, and on Windows Mobile, 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 certain ActiveX control in vpnweb.ocx, aka Bug ID CSCsy00904.
How severe is CVE-2011-2039?: CVE-2011-2039 has a CVSS 2.0 base score of 7.6, rated high severity.
Is CVE-2011-2039 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 70% (99th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2011-2039?: CVE-2011-2039 primarily affects Cisco Anyconnect Secure Mobility Client. In total, 8 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.
How do I fix CVE-2011-2039?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its high severity, prioritise patching exposed systems.
When was CVE-2011-2039 published?: CVE-2011-2039 was published on 2011-06-02 and last updated on 2026-06-16.

References

Affected products (8)

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:*:*:*:*:*:*:*

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