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CVE-2021-43271

23
FAUCET Score

CVE-2021-43271 describes an information disclosure vulnerability in Riverbed AppResponse versions 11.8.0 through 11.11.5a, when configured with local, RADIUS, or TACACS authentication. Incorrect login attempts to the WebUI result in usernames and passwords being logged in a WebUI log file, which is subsequently included in diagnostic system dumps. This vulnerability has a CVSS score of 6.8 (Medium), indicating that a highly privileged attacker could potentially compromise confidentiality, integrity, and availability if a user is tricked into generating a system dump. There is no evidence of active exploitation, public exploit code (Metasploit, Nuclei, ExploitDB), or significant community discussion surrounding this CVE.

Impacted Technologies

VendorProductVersion(s)CPE
11.8.0CPE matchmatch criteria
cpe:2.3:a:riverbed:appresponse:11.8.0:*:*:*:*:*:*:*
11.8.5CPE matchmatch criteria
cpe:2.3:a:riverbed:appresponse:11.8.5:*:*:*:*:*:*:*
11.8.5aCPE matchmatch criteria
cpe:2.3:a:riverbed:appresponse:11.8.5a:*:*:*:*:*:*:*
11.9.0CPE matchmatch criteria
cpe:2.3:a:riverbed:appresponse:11.9.0:*:*:*:*:*:*:*
11.9.0aCPE matchmatch criteria
cpe:2.3:a:riverbed:appresponse:11.9.0a:*:*:*:*:*:*:*

CVSS Data

CVSS version used by this source: 3.1

6.8MEDIUM

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

Attack Vector
NETWORK
Attack Complexity
LOW
Privileges Required
HIGH
User Interaction
REQUIRED
Scope
UNCHANGED
Confidentiality Impact
HIGH
Integrity Impact
HIGH
Availability Impact
HIGH
Exploitability Score
0.9
Impact Score
5.9
CvssVersion
3.1

Exploit Intelligence

EPSS Score
0.76%
Probability of exploitation in next 30 days
EPSS Percentile
51.6%
Percentile rank of EPSS score among Peer Group
As of 2026-07-27
Model: v2026.06.15
This CVE's current EPSS score of 0.0076 is in the 89th percentile among its peer group of 4,931 CVEs.

Social Chatter

The average CVE in this peer group has 0.0 Twitter, 0.0 Reddit, 0.0 Bluesky, 0.0 Mastodon, and 0.1 GitHub mentions.

Media Mentions

No media coverage found for this CVE.

The average CVE in this peer group has 0.0 InfoSec Media, 0.0 Vendor Blog, and 0.0 Security Researcher mentions.

Remediation

Remediation records are not available for this CVE.

References

supportkb.riverbed.com / support/index
Vendor Advisory