Which products and versions are affected by CVE-2011-2039?

Affected: Anyconnect Secure Mobility Client (Cisco) versions 2.0, 2.1, 2.2, 2.2.128, 2.2.133, 2.2.136, 2.2.140. The full list is in the CVE brief.

Is CVE-2011-2039 being exploited in the wild?

It is not listed in any known-exploited vulnerabilities catalog.

Is CVE-2011-2039 in the CISA KEV catalog?

No, it is not currently listed in the CISA Known Exploited Vulnerabilities catalog.

Is there a public exploit for CVE-2011-2039?

Public exploit code is available.

Is there a fix for CVE-2011-2039?

Fixed versions are available, including Anyconnect Secure Mobility Client 2.3.

How urgently should CVE-2011-2039 be patched?

Brandefense priority: patch immediately, because it is very likely to be exploited soon.

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Vulnerability Intelligence

CVE-2011-2039

HighPublic exploit

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…

Published Jun 2, 2011 · Updated Apr 28, 2026

Key Facts

Patch immediately

CVE-2011-2039 is a high-severity vulnerability (CVSS 7.6 v2) affecting Anyconnect Secure Mobility Client (Cisco).
It is not listed in any known-exploited vulnerabilities catalog. Public exploit code is available.
EPSS estimates a 70% probability of exploitation in the next 30 days.
Fixed versions are available, including Anyconnect Secure Mobility Client 2.3.
Brandefense priority: patch immediately, because it is very likely to be exploited soon.

CVSS v2

7.6

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

EPSS (30-day exploit likelihood)

70%

Higher than 99.3% of all scored CVEs

Exploited in the wild

No known

Not in a known-exploited catalog

Public exploit code

Available

Proof-of-concept or weaponized module

Get the full CVE-2011-2039 brief as a PDF

Every affected product and fixed release, exploitation status and a first 24 hours response checklist, emailed within minutes.

Description

Affected Products

8 affected entries in total

Product	Affected versions	Fixed in
Anyconnect Secure Mobility ClientCisco	2.0, 2.1, 2.2, 2.2.128, 2.2.133, 2.2.136, 2.2.140	2.3

Patched Releases

Anyconnect Secure Mobility Client

2.3

Timeline

Publicly disclosed
Jun 2, 2011
Last updated
Apr 28, 2026

Weakness Type

CWE-20 Improper Input Validation

References

advisory20110601 Multiple Vulnerabilities in Cisco AnyConnect Secure Mobility Client
exploitMSF cisco_anyconnect_exec.rb
exploitExploitDB-17366
other20110601 Cisco AnyConnect VPN Client Arbitrary Program Execution Vulnerability
other72714

4 more references in the full CVE brief

FAQ

Common Questions.

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…
Affected: Anyconnect Secure Mobility Client (Cisco) versions 2.0, 2.1, 2.2, 2.2.128, 2.2.133, 2.2.136, 2.2.140. The full list is in the CVE brief.
It is not listed in any known-exploited vulnerabilities catalog.
No, it is not currently listed in the CISA Known Exploited Vulnerabilities catalog.
Public exploit code is available.
Fixed versions are available, including Anyconnect Secure Mobility Client 2.3.
Brandefense priority: patch immediately, because it is very likely to be exploited soon.

Is CVE-2011-2039 Running On Your Attack Surface?

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