Cisco Linksys Router up to E4200 tmUnblock.cgi ttcp_ip privileges management

CVSS Meta Temp Score
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Current Exploit Price (≈)
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CTI Interest Score
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A vulnerability was found in Cisco Linksys Router up to E4200 (Router Operating System) and classified as very critical. Affected by this issue is an unknown function of the file tmUnblock.cgi. The manipulation of the argument ttcp_ip with an unknown input leads to a privileges management vulnerability. Using CWE to declare the problem leads to CWE-269. The product does not properly assign, modify, track, or check privileges for an actor, creating an unintended sphere of control for that actor. Impacted is confidentiality, integrity, and availability.

The bug was discovered 02/13/2013. The weakness was disclosed 02/17/2014 by Johannes Ullrich as File 125253 as not defined exploit (Packetstorm). The advisory is available at The exploitation is known to be easy. The attack may be launched remotely. No form of authentication is required for exploitation. Technical details as well as a public exploit are known. The structure of the vulnerability defines a possible price range of USD $0-$5k at the moment (estimation calculated on 03/30/2019). This vulnerability is assigned to T1068 by the MITRE ATT&CK project. This vulnerability has a historic impact due to its background and reception.

A public exploit has been developed in Python and been published even before and not after the advisory. The exploit is available at It is declared as highly functional. As 0-day the estimated underground price was around $25k-$100k. A worm is spreading, which is automatically exploiting this vulnerability.

Addressing this vulnerability is possible by firewalling tcp/8080. A possible mitigation has been published even before and not after the disclosure of the vulnerability.

The vulnerability is also documented in the vulnerability database at X-Force (91196). is providing further details. The entry VDB-12069 is pretty similar.








  • end of life (old version)

CPE 2.3info

CPE 2.2info


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VulDB Meta Base Score: 9.8
VulDB Meta Temp Score: 9.2

VulDB Base Score: 9.8
VulDB Temp Score: 9.2
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Class: Privileges management
CWE: CWE-269 / CWE-266

Local: No
Remote: Yes

Availability: 🔍
Access: Public
Status: Highly functional
Wormified: 🔍
Programming Language: 🔍
Download: 🔍
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Threat Intelligenceinfo

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Recommended: Firewall
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Firewalling: 🔍


02/13/2013 🔍
02/13/2013 +0 days 🔍
02/13/2013 +0 days 🔍
02/13/2014 +365 days 🔍
02/17/2014 +4 days 🔍
02/22/2014 +5 days 🔍
03/30/2019 +1862 days 🔍



Advisory: File 125253
Researcher: Johannes Ullrich
Status: Not defined
X-Force: 91196 - Multiple Linksys routers tmUnblock.cgi command execution, High Risk
SecurityFocus: 65585 - Multiple Linksys Devices Multiple Remote Code Execution Vulnerabilities
Secunia: 56994

scip Labs:
Misc.: 🔍
See also: 🔍


Created: 02/22/2014 03:03 PM
Updated: 03/30/2019 03:48 PM
Changes: 02/22/2014 03:03 PM (53), 03/30/2019 03:48 PM (10)
Complete: 🔍
Cache ID: 44:27E:40


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