Directory Traversal Delete/Read at AgentDiagnosticServlet

published 2022-03-09 4 y ago modified 2026-06-17 4 mo ago also EUVD-2021-29808

cvss: 9.1; version 3.1, CNA
cisa kev: Not listed; not in CISA's catalog
epss: 1.6%; EPSS 1.6% chance of exploitation in 30 days, percentile 75%
public exploits: 0; none known

It was discovered that the SteelCentral AppInternals Dynamic Sampling Agent's (DSA) AgentDiagnosticServlet has directory traversal vulnerability at the "/api/appInternals/1.0/agent/diagnostic/logs" API. The affected endpoint does not have any input validation of the user's input that allows a malicious payload to be injected.

Patch / fix

fixed in 1

riverbed steelcentral_appinternals_dynamic_sampling_agent 11.8.8, 12.13.0

Exploit prediction

1.57% chance of exploitation in the next 30 days, higher than 75% of all scored CVEs (FIRST EPSS, 2026-11-08).

CVSS scores

assigned by	version	score	vector
CNA	3.1	9.1	CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:H
NVD	3.1	9.8	CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
NVD	2.0	7.5	AV:N/AC:L/Au:N/C:P/I:P/A:P

Affected products

Aternity SteelCentral AppInternals Dynamic Sampling Agent

Classification

Weakness

CWE-20 Improper Input Validation
CWE-22 Improper Limitation of a Pathname to a Restricted Directory

References

aternity.force.com /customersuccess/s/article/Directory-Traversal-Delete-Read-at-AgentDiagnosticServlet-CVE-2021-42853
third-party-advisory

Sources

CVE List CVE-2021-42853
NVD CVE-2021-42853

Fencer Vulns keeps one entry per vulnerability: the CVE id wins, then GHSA, and records that alias each other are merged, except that two CVEs always keep separate entries. The same data is available as JSON.

Summary