CVE-2026-12059Network attack vector

Authenticated command execution via SSH restriction bypass

Published Jun 12, 2026 · Updated Jun 12, 2026

Improper access control in the CelloOS SSH service before 4.8.0 Build 20260316 allows remote authenticated users to execute restricted OS commands. The advisory identifies the SSH command-restriction layer but does not disclose the validation logic or input sequence that bypasses it. A valid SSH account is required; exploitation grants command execution with the authenticated session's privileges.

CVSS severity8.7
High
EPSS probability0.45%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Improper access control in the CelloOS SSH service before 4.8.0 Build 20260316 allows remote authenticated users to execute restricted OS commands. The advisory identifies the SSH command-restriction layer but does not disclose the validation logic or input sequence that bypasses it. A valid SSH account is required; exploitation grants command execution with the authenticated session's privileges.

The record

CVE
CVE-2026-12059
Published
Jun 12, 2026
Updated
Jun 12, 2026
Vendor
Cellopoint
Product
CelloOS
Classifications
CWE-1284, T1059
Attack vector
network
Privileges
authenticated

Timeline

How it unfolded

  1. Jun 12, 2026CVE publishedPublication date reported by the CVE source.
  2. Jun 12, 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=0 <4.8.0 Build 20260316

What conditions does exploitation require?

Attack vectornetwork
Required privilegesauthenticated

What is affected?

Cellopoint · CelloOSversion=0 <4.8.0 Build 20260316

Published CVSS scores

8.8TWCERT/CCCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
8.7TWCERT/CCCVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N

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 9, 2026Sep 15, 2026
Latest reporting daySep 15, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-1284Improper Validation of Specified Quantity in Input
T1059Command and Scripting Interpreter

Public exploit references

No public exploit references are available in this record.

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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