Cisco Catalyst 2940 Series Switches vulnerable to cross-site scripting


Cisco Catalyst 2940 Series Switches provided by Cisco Systems, Inc., with firmware versions prior to 12.2(50)SY, improperly processes user input and generates error pages, leading to a cross-site scripting vulnerability (CWE-79).

The vulnerability has been addressed on 12.2(50)SY released in 2011 (Cisco bug id: CSCek36997), and Cisco Catalyst 2940 Series Switches has been End-of-Support since 2015.

Imaoka Ryo of Cyber Security Research Team reported this vulnerability to IPA.
JPCERT/CC coordinated with the developer under Information Security Early Warning Partnership.
CVSS Severity (What is CVSS?)

CVSS V3 Severity:
Base Metrics 5.4 (Medium) [IPA Score]
  • Attack Vector: Network
  • Attack Complexity: Low
  • Privileges Required: Low
  • User Interaction: Required
  • Scope: Changed
  • Confidentiality Impact: Low
  • Integrity Impact: Low
  • Availability Impact: None
CVSS V2 Severity:
Base Metrics 4.3 (Medium) [IPA Score]
  • Access Vector: Network
  • Access Complexity: Medium
  • Authentication: None
  • Confidentiality Impact: None
  • Integrity Impact: Partial
  • Availability Impact: None
Affected Products

Cisco Systems, Inc.
  • Cisco Catalyst 2940 Series Switch firmware versions prior to 12.2(50)SY


An arbitrary script may be executed on the web browser of the user who is using the product.

[Stop using the products and Switch to alternative products]
The developer states that the affected products are no longer supported, and recommends to use alternative unaffected products.
Vendor Information

Cisco Systems, Inc.
CWE (What is CWE?)

  1. Cross-site Scripting(CWE-79) [IPA Evaluation]
CVE (What is CVE?)

  1. CVE-2022-31734

  1. JVN : JVN#94363766
Revision History

  • [2022/06/14]
      Web page was published