CVE-2026-27653

SYSTEM code execution via permissive install-directory permissions

Published Feb 27, 2026 · Updated Feb 27, 2026

Incorrect default permissions in Soliton Windows product installers allow local users to execute arbitrary code with SYSTEM privileges. For a nondefault installation path, the installer applies overly broad file-access permissions, but Soliton has not identified the affected file or ACL entry. Exploitation requires local low-privileged access and user interaction on a Windows host; successful abuse compromises the host.

CVSS severity5.4
Medium
EPSS probability0.09%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Incorrect default permissions in Soliton Windows product installers allow local users to execute arbitrary code with SYSTEM privileges. For a nondefault installation path, the installer applies overly broad file-access permissions, but Soliton has not identified the affected file or ACL entry. Exploitation requires local low-privileged access and user interaction on a Windows host; successful abuse compromises the host.

The record

CVE
CVE-2026-27653
Published
Feb 27, 2026
Updated
Feb 27, 2026
Vendor
Soliton Systems K.K.
Product
Soliton SecureWorkspace
Classifications
CWE-863, CWE-276, T1068
Attack vector
local
Privileges
authenticated

Timeline

How it unfolded

  1. Feb 27, 2026CVE publishedPublication date reported by the CVE source.
  2. Feb 27, 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=V1.0.0 to V1.4.7

What conditions does exploitation require?

Attack vectorlocal
Required privilegesauthenticated

What is affected?

Soliton Systems K.K. · Soliton SecureWorkspaceversion=V1.0.0 to V1.4.7
Soliton Systems K.K. · Soliton SecureBrowser for OneGateversion=V1.0.0
Soliton Systems K.K. · Soliton SecureBrowser IIversion=V2.0.0 to V2.0.14

Published CVSS scores

5.4JPCERT/CCCVSS:4.0/AV:L/AC:L/AT:P/PR:L/UI:P/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N
6.7JPCERT/CCCVSS:3.0/AV:L/AC:H/PR:L/UI:R/S:U/C:H/I:H/A:H
6.7NIST NVDCVSS:3.1/AV:L/AC:H/PR:L/UI:R/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)
Vectorlocal
Privilegesauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-863Incorrect Authorization
CWE-276Incorrect Default Permissions
T1068Exploitation for Privilege Escalation

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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