CVE-2021-42786Public exploitNetwork attack vector

Unauthenticated command execution via unvalidated URL path

Published Mar 9, 2022 · Updated Sep 17, 2024

Command injection in SteelCentral AppInternals DSA before 11.8.8 or 12.13.0 allows remote attackers to execute system commands. AgentControllerServlet passes an unvalidated URL-path component through runAgent into the platform agent script, where shell metacharacters alter the command. No authentication or user interaction is required; successful exploitation executes with the agent service account's privileges.

CVSS severity9.8
Critical
EPSS probability2.09%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Command injection in SteelCentral AppInternals DSA before 11.8.8 or 12.13.0 allows remote attackers to execute system commands. AgentControllerServlet passes an unvalidated URL-path component through runAgent into the platform agent script, where shell metacharacters alter the command. No authentication or user interaction is required; successful exploitation executes with the agent service account's privileges.

The record

CVE
CVE-2021-42786
Published
Mar 9, 2022
Updated
Sep 17, 2024
Vendor
Riverbed Technology
Product
SteelCentral AppInternals Dynamic Sampling Agent
Classifications
CWE-20, T1059.003
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Mar 9, 2022CVE publishedPublication date reported by the CVE source.
  2. Sep 17, 2024Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

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Is a vulnerable build present?

Compare these published version ranges with your installed build and any vendor patches.

  1. Affected versionversion=10.x
  2. Affected versionversion=11.8.8 <11.8.8
  3. Affected versionversion=12.13.0 <12.13.0

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

Riverbed Technology · SteelCentral AppInternals Dynamic Sampling Agentversion=10.x; version=11.8.8 <11.8.8; version=12.13.0 <12.13.0

Published CVSS scores

7.5NIST National Vulnerability DatabaseAV:N/AC:L/Au:N/C:P/I:P/A:P
9.8Government Technology Agency of Singapore Cyber Security GroupCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.

Daily unique IPsNo honeypot observations are available for this CVE in the selected window.

No observations available

Sep 10, 2026Sep 16, 2026
Latest reporting daySep 16, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitPublished

Weakness, pattern, technique

CWE-20Improper Input Validation
T1059.003Windows Command Shell

Public exploit references

Labels summarize the accepted research assessment. They do not indicate a test against your environment.

Technologies

Your stack

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Your stack

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