Cisco ASA up to 9.1 ASDM access control

CVSS Meta Temp Score
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CTI Interest Score
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A vulnerability was found in Cisco ASA up to 9.1 (Firewall Software). It has been rated as critical. Affected by this issue is an unknown functionality of the component ASDM Handler. The manipulation with an unknown input leads to a access control vulnerability. Using CWE to declare the problem leads to CWE-264. Impacted is confidentiality, integrity, and availability.

The weakness was published 04/09/2014 by Jonathan Claudius with Cisco as cisco-sa-20140409-asa as confirmed advisory (Website). The advisory is shared for download at The public release has been coordinated with the vendor. The advisory contains:

Only traffic destined to the affected device can be used to exploit this vulnerability. This vulnerability affects Cisco ASA Software configured in routed or transparent firewall mode and single or multiple context mode. This vulnerability can be triggered by IP version 4 (IPv4) and IP version 6 (IPv6) traffic. A TCP three-way handshake is needed to exploit this vulnerability.
This vulnerability is handled as CVE-2014-2126 since 02/25/2014. The attack may be launched remotely. The successful exploitation needs a simple authentication. There are neither technical details nor an exploit publicly available. The MITRE ATT&CK project declares the attack technique as T1068. The advisory points out:
The vulnerability is due to improper privilege assignment to users with privilege level 0. An attacker could exploit this vulnerability by logging in to the Cisco ASDM with user credentials with privilege level 0. An exploit could allow the attacker or an unprivileged user to elevate the access privileges and gain administrative access to the affected system.

The vulnerability scanner Nessus provides a plugin with the ID 73533 (Cisco ASA Software Multiple Vulnerabilities (cisco-sa-20140409-asa)), which helps to determine the existence of the flaw in a target environment. It is assigned to the family CISCO.

Applying the patch cisco-sa-20140409-asa is able to eliminate this problem. The bugfix is ready for download at It is possible to mitigate the problem by applying the configuration setting username cisco1 password privilege 1.Addressing this vulnerability is possible by firewalling IPv4/IPv6. The best possible mitigation is suggested to be patching the affected component. A possible mitigation has been published immediately after the disclosure of the vulnerability.

The vulnerability is also documented in the databases at X-Force (92383), SecurityTracker (ID 1030046), Vulnerability Center (SBV-43984) and Tenable (73533). is providing further details. Similar entries are available at 12863, 12862 and 12861.






  • commercial

CPE 2.3info

CPE 2.2info


VulDB Meta Base Score: 8.8
VulDB Meta Temp Score: 7.7

VulDB Base Score: 8.8
VulDB Temp Score: 7.7
VulDB Vector: 🔍
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Class: Access control
CWE: CWE-264
ATT&CK: T1068

Local: No
Remote: Yes

Availability: 🔍
Status: Unproven

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EPSS Percentile: 🔍

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Nessus ID: 73533
Nessus Name: Cisco ASA Software Multiple Vulnerabilities (cisco-sa-20140409-asa)
Nessus File: 🔍
Nessus Risk: 🔍
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Threat Intelligenceinfo

Interest: 🔍
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Recommended: Patch
Status: 🔍

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Patch: cisco-sa-20140409-asa
Config: username cisco1 password privilege 1
Firewalling: 🔍


02/25/2014 🔍
04/09/2014 +43 days 🔍
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04/15/2014 +5 days 🔍
06/16/2021 +2619 days 🔍



Advisory: cisco-sa-20140409-asa
Researcher: Jonathan Claudius
Organization: Cisco
Status: Confirmed
Coordinated: 🔍

CVE: CVE-2014-2126 (🔍)

X-Force: 92383 - Cisco Adaptive Security Appliance ASDM privilege escalation, High Risk
SecurityTracker: 1030046 - Cisco ASA Bugs Let Remote Users Access the Internal Network or Deny Service and Remote Authenticated Users Gain Elevated Privileges
Vulnerability Center: 43984 - [cisco-sa-20140409-asa] Cisco ASA Remote Privileges Escalation by Leveraging Level-0 ASDM Access, High
SecurityFocus: 66747 - Cisco ASA Software CVE-2014-2126 Remote Privilege Escalation Vulnerability
Secunia: 57820 - Cisco Adaptive Security Appliance (ASA) Multiple Vulnerabilities, Moderately Critical

Misc.: 🔍
See also: 🔍


Created: 04/10/2014 10:26 AM
Updated: 06/16/2021 07:11 PM
Changes: 04/10/2014 10:26 AM (56), 05/25/2017 10:16 AM (39), 06/16/2021 07:11 PM (3)
Complete: 🔍


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