Is CVE-2021-43271 actively exploited?

No active exploitation of CVE-2021-43271 has been confirmed so far. Continue monitoring, as exploit status can change.

Can CVE-2021-43271 be exploited remotely?

Yes. CVE-2021-43271 is exploitable remotely over the network (CVSS attack vector: Network).

What is the CVSS score of CVE-2021-43271?

CVE-2021-43271 has a CVSS score of 6.8 (MEDIUM).

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MEDIUM

CVE-2021-43271

CWE-532Published: June 3, 2022· Updated: Jun 17, 2026

6.8

CVSS v3.1

Official Description

Riverbed AppResponse 11.8.0, 11.8.5, 11.8.5a, 11.9.0, 11.9.0a, 11.10.0, 11.11.0, 11.11.0a, 11.11.1, 11.11.1a, 11.11.5, and 11.11.5a (when configured to use local, RADIUS, or TACACS authentication) logs usernames and passwords if either is entered incorrectly. If a user enters an incorrect username and/or password when logging into the WebUI, these attempted credentials are included in an error message that is logged in the WebUI log file. A log entry does not appear if the username and password provided correctly match a valid set of credentials. This also does not happen if AppResponse is configured to use SAML authentication. The WebUI log file is included in subsequent diagnostic system dumps that are generated. (Only users with Full Control access to the System Configuration permission can generate system dumps. By default, only System Administrators have Full Control access to the System Configuration permission.)

NVD Source

Technical Analysis

CVE-2021-43271 can be exploited remotely over the network without requiring physical or adjacent access, significantly expanding the attack surface for threat actors.

Exploitation requires high privileges, which limits the exposure to scenarios where an attacker has already gained initial access.

A successful exploit results in complete confidentiality breach (data exposure), full integrity compromise (data manipulation), availability disruption (denial of service), with a CVSS base score of 6.8.