CVE-2021-43271

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.)

Published: 2022-06-03 Last update: 2024-11-21 Assigner: [email protected] Source: [email protected]
NVD Status：Modified，CVE State: published
View at NVD, CVE.org, EUVD

CVE-2021-43271 is rated Moderate Risk (44.2/100): CVSS Medium severity, with low exploitation likelihood (EPSS 0.26%). Review affected assets and schedule remediation.

Risk is dynamic; we continuously reassess and refresh what is shown on this page as upstream context changes.

Exploit prediction scoring system (EPSS) score for CVE-2021-43271

EPSS lead: Daily EPSS estimates relative likelihood of exploitation; percentile ranks this CVE among scored vulnerabilities (higher = more severe relative rank).

# Date Old EPSS score New EPSS score Delta (New - Old)
1 2025-06-16 0.38% 0.26% -0.12%
2 2025-06-05 0.21% 0.38% +0.16%
3 2025-03-30 — 0.21% —

Full EPSS history (7 records total)

Common vulnerability scoring system (CVSS) metrics for CVE-2021-43271

CVSS metrics for this CVE.

Base score Version Severity Vector Exploitability Impact Score source
6.8 3.1 MEDIUM
CVSS:3.1/AV:N/AC:L/PR:H/UI:R/S:U/C:H/I:H/A:H Click to expand
Attack vector (AV:N)
Could be attacked over the internet or any normal routed network—not just someone sitting at the machine.
Attack complexity (AC:L)
Once they can reach the bug, pulling it off is straightforward—no weird race conditions or rare setup.
Privileges required (PR:H)
They need powerful rights—admin, root, or similar—before this pays off.
User interaction (UI:R)
A real person has to do something—click, install, enable—otherwise it doesn’t land.
Scope (S:U)
Damage stays in the same “trust bubble” as the broken component—no big spill into unrelated systems.
Confidentiality (C:H)
Serious risk that confidential data gets exposed in a big way.
Integrity (I:H)
They could widely tamper with or forge data—trust in the data is badly hurt.
Availability (A:H)
Could take the service down hard or make it unusable for people who depend on it.
 0.9 5.9 [email protected]
7.1 2.0 HIGH
AV:N/AC:H/Au:S/C:C/I:C/A:C Click to expand
Access vector (AV:N)
Can be exploited remotely over network reachability.
Access complexity (AC:H)
Exploitation requires uncommon or highly specific conditions.
Authentication (AU:S)
A single authentication is required.
Confidentiality impact (C:C)
Complete confidentiality impact.
Integrity impact (I:C)
Complete integrity impact.
Availability impact (A:C)
Complete availability impact.
 3.9 10.0 [email protected]

Weakness enumeration for CVE-2021-43271

Affected software / configurations for CVE-2021-43271

Vendor Product Version Raw CPE
riverbed appresponse 11.8.0 cpe:2.3:a:riverbed:appresponse:11.8.0:*:*:*:*:*:*:*
riverbed appresponse 11.8.5 cpe:2.3:a:riverbed:appresponse:11.8.5:*:*:*:*:*:*:*
riverbed appresponse 11.8.5a cpe:2.3:a:riverbed:appresponse:11.8.5a:*:*:*:*:*:*:*
riverbed appresponse 11.9.0 cpe:2.3:a:riverbed:appresponse:11.9.0:*:*:*:*:*:*:*
riverbed appresponse 11.9.0a cpe:2.3:a:riverbed:appresponse:11.9.0a:*:*:*:*:*:*:*
riverbed appresponse 11.10.0 cpe:2.3:a:riverbed:appresponse:11.10.0:*:*:*:*:*:*:*
riverbed appresponse 11.11.0 cpe:2.3:a:riverbed:appresponse:11.11.0:*:*:*:*:*:*:*
riverbed appresponse 11.11.0a cpe:2.3:a:riverbed:appresponse:11.11.0a:*:*:*:*:*:*:*
riverbed appresponse 11.11.1 cpe:2.3:a:riverbed:appresponse:11.11.1:*:*:*:*:*:*:*
riverbed appresponse 11.11.1a cpe:2.3:a:riverbed:appresponse:11.11.1a:*:*:*:*:*:*:*
riverbed appresponse 11.11.5 cpe:2.3:a:riverbed:appresponse:11.11.5:*:*:*:*:*:*:*
riverbed appresponse 11.11.5a cpe:2.3:a:riverbed:appresponse:11.11.5a:*:*:*:*:*:*:*

References for CVE-2021-43271

cvelogic Threat Intelligence