CVE-2021-34739 HIGH

CVE-2021-34739: Cisco Small Business Series Switches Session Credentials Replay Vulnerability

Vendor Cisco
Product Cisco Small Business Smart and Managed Switches
Weakness CWE-613 · Insufficient session expiration
Published November 4, 2021
Last update November 7, 2024

CVSS base score

8.1/10
Attack vector Network
Attack complexity High
Privileges required None
User interaction None
Confidentiality High
Integrity High

CVSS vector

CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H

What the vulnerability does

01Description

A vulnerability in the web-based management interface of multiple Cisco Small Business Series Switches could allow an unauthenticated, remote attacker to replay valid user session credentials and gain unauthorized access to the web-based management interface of an affected device. This vulnerability is due to insufficient expiration of session credentials. An attacker could exploit this vulnerability by conducting a man-in-the-middle attack against an affected device to intercept valid session credentials and then replaying the intercepted credentials toward the same device at a later time. A successful exploit could allow the attacker to access the web-based management interface with administrator privileges.

Key dates

02Disclosure timeline

November 4, 2021 CVE published
November 7, 2024 Record updated