CVE-2026-53542Public exploitNetwork attack vector

Authenticated command execution via tar option injection

Published Aug 19, 2026 · Updated Aug 25, 2026

OS command injection in Termix before 2.3.2 allows remote authenticated users to execute commands on managed SSH hosts via archive creation. The archive endpoint in src/backend/ssh/file-manager.ts passes selected basenames to GNU tar without an end-of-options marker or relative-path prefix, so option-like names trigger checkpoint actions. Access to an SSH file-manager session is sufficient; commands run as the connected SSH account and can read or modify accessible files or interrupt services.

CVSS severity8.8
High
EPSS probability0.61%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

OS command injection in Termix before 2.3.2 allows remote authenticated users to execute commands on managed SSH hosts via archive creation. The archive endpoint in src/backend/ssh/file-manager.ts passes selected basenames to GNU tar without an end-of-options marker or relative-path prefix, so option-like names trigger checkpoint actions. Access to an SSH file-manager session is sufficient; commands run as the connected SSH account and can read or modify accessible files or interrupt services.

The record

CVE
CVE-2026-53542
Published
Aug 19, 2026
Updated
Aug 25, 2026
Vendor
Termix-SSH
Product
Termix
Classifications
CWE-78, T1059.004
Attack vector
network
Privileges
authenticated

Timeline

How it unfolded

  1. Aug 19, 2026CVE publishedPublication date reported by the CVE source.
  2. Aug 25, 2026Record 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=< 2.3.2

What conditions does exploitation require?

Attack vectornetwork
Required privilegesauthenticated

What is affected?

Termix-SSH · Termixversion=< 2.3.2

Published CVSS scores

8.8GitHubCVSS:3.1/AV:N/AC:L/PR:L/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.

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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
Privilegesauthenticated
Known exploitationUnconfirmed
Public exploitPublished

Weakness, pattern, technique

CWE-78Improper Neutralization of Special Elements used in an OS Command ('OS Command Injection')
T1059.004Unix 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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