Cisco IOS up to 12.2t Express Forwarding Processing Module information disclosure

CVSS Meta Temp Score
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Current Exploit Price (≈)
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CTI Interest Score
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A vulnerability classified as problematic has been found in Cisco IOS up to 12.2t (Router Operating System). Affected is an unknown code block of the component Express Forwarding Processing Module. The manipulation with an unknown input leads to a information disclosure vulnerability. CWE is classifying the issue as CWE-200. This is going to have an impact on confidentiality, and integrity.

The bug was discovered 02/27/2002. The weakness was shared 02/27/2002 by Cisco Security with Cisco as confirmed advisory ( The advisory is shared for download at This vulnerability is traded as CVE-2002-0339. The exploitability is told to be easy. It is possible to launch the attack remotely. The exploitation doesn't require any form of authentication. There are neither technical details nor an exploit publicly available. The current price for an exploit might be approx. USD $0-$5k (estimation calculated on 05/12/2019).

The vulnerability scanner Nessus provides a plugin with the ID 48964 (Data Leak with Cisco Express Forwarding Enabled - Cisco Systems), which helps to determine the existence of the flaw in a target environment. It is assigned to the family CISCO and running in the context local.

Applying a patch is able to eliminate this problem. A possible mitigation has been published immediately after the disclosure of the vulnerability.

The vulnerability is also documented in the databases at SecurityFocus (BID 4191), X-Force (8296), Vulnerability Center (SBV-2071) and Tenable (48964).





CPE 2.3infoedit

CPE 2.2infoedit


VulDB Meta Base Score: 5.3
VulDB Meta Temp Score: 5.1

VulDB Base Score: 5.3
VulDB Temp Score: 5.1
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Class: Information disclosure
CWE: CWE-200
ATT&CK: Unknown

Local: No
Remote: Yes

Availability: 🔍
Status: Not defined

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Current Price Estimation: 🔍


Nessus ID: 48964
Nessus Name: Data Leak with Cisco Express Forwarding Enabled - Cisco Systems
Nessus File: 🔍
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Threat Intelligenceinfoedit

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Recommended: Patch
Status: 🔍

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01/01/2002 🔍
02/27/2002 +57 days 🔍
02/27/2002 +0 days 🔍
02/27/2002 +0 days 🔍
02/27/2002 +0 days 🔍
06/25/2002 +118 days 🔍
09/12/2002 +79 days 🔍
09/10/2003 +362 days 🔍
09/01/2010 +2548 days 🔍
07/11/2014 +1409 days 🔍
05/21/2018 +1410 days 🔍
05/12/2019 +356 days 🔍



Researcher: Cisco Security
Organization: Cisco
Status: Confirmed

CVE: CVE-2002-0339 (🔍)

SecurityFocus: 4191 - Cisco IOS Cisco Express Forwarding Session Information Leakage Vulnerability
X-Force: 8296
Vulnerability Center: 2071 - Cisco IOS 11.1CC - 12.2 with Cisco Express Forwarding \x27enabled\x27 Allows Information Leakage, Low
OSVDB: 806 - Cisco IOS Cisco Express Forwarding (CEF) Previous Packet Information Disclosure


Created: 07/11/2014 02:15 PM
Updated: 05/12/2019 09:08 PM
Changes: (6) advisory_person_name advisory_company_name countermeasure_name countermeasure_date source_securityfocus_date source_securityfocus_class
Complete: 🔍


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