Security readout for executives and security teams
Plain-English summary
This flaw affects installers for several Soliton Systems products. Because installer permissions are too loose, a local low-privileged user may be able to cause code to run with Windows SYSTEM privileges. This is not a remote break-in by itself, but it can turn an existing foothold into full control of an affected machine.
Executive priority
Treat this as a targeted endpoint hardening issue, not an internet-wide emergency. Prioritize organizations using the listed Soliton products, especially where endpoints are shared or exposed to lower-privileged users. Remediation should be tracked through normal vulnerability management with attention to privileged endpoint risk.
Technical view
CVE-2026-27653 is a CWE-276 incorrect default permissions issue in installers for Soliton SecureBrowser for OneGate V1.0.0, SecureBrowser II V2.0.0 through V2.0.14, and SecureWorkspace V1.0.0 through V1.4.7. CVSS 3.0 is 6.7 with local access, high complexity, low privileges, and user interaction required.
Likely exposure
Exposure is limited to systems where affected Soliton installers or installations are present. The vulnerability requires local access and some user interaction, so risk is highest on shared workstations, managed endpoints, or systems where an attacker already has limited access.
Exploitation context
No active exploitation is indicated in the provided sources, and the CVE is not listed as KEV. The main concern is local privilege escalation to SYSTEM, which could support persistence, credential theft, or disabling controls after initial access.
Researcher notes
The public record identifies affected products, version ranges, CWE-276, and privilege-escalation impact, but does not provide detailed exploitation mechanics in the supplied bundle. Avoid assuming remote exploitability or available public exploit code. Validate exposure by version and installer permission state, then follow vendor guidance.
Mitigation direction
- Identify endpoints using the affected Soliton products and versions.
- Review Soliton’s advisory and JVN guidance for vendor-approved remediation.
- Prioritize managed endpoints where non-administrative users can log in locally.
- Restrict local access to affected systems until remediation is confirmed.
- Monitor vendor sources for corrected installers or additional mitigation instructions.
Validation and detection
- Inventory installed Soliton product names and versions on endpoints.
- Check whether affected installer packages remain accessible to standard users.
- Confirm remediation status against Soliton and JVN advisory guidance.
- Review endpoint logs for suspicious local privilege escalation indicators.
- Document systems where affected versions cannot yet be remediated.
Public sources used
Generated from the cited source records. This long-tail analysis has not been individually reviewed by a named human.
Conservative CVE-to-ATT&CK context
These mappings and lookup hints may be relevant to the vulnerability behavior, CWE, affected product, or exposure path. Glexia-inferred context is not an official MITRE, ATT&CK, CWE, or CVE Program mapping.
ATT&CK lookup starting points
Use these exact CWE pages and searches to review the Glexia ATT&CK library from this CVE's weakness and description context.
CWE-276: Exact CWE lookup
Use the exact CWE identifier as the starting point before reviewing related ATT&CK behavior. Open the exact CWE lookup page first, then review the ATT&CK searches from that MITRE weakness context. This is a Glexia lookup hint, not an official ATT&CK mapping.
Open ATT&CK lookupExecution behavior lookup
The CVE wording references code or command execution, so execution technique review may help defensive triage. This is a Glexia inferred lookup path, not an official MITRE, ATT&CK, or CVE Program mapping.
Open ATT&CK lookupCVE-2026-27653 mapping review
Open the CVE-to-ATT&CK bridge for reviewed, inferred, or future official mappings tied to this CVE.
Open ATT&CK lookup- Severity
- Medium
- CVSS
- 6.7 (3.0)
- Known Exploited
- No
- Published
Vector: CVSS:3.0/AV:L/AC:H/PR:L/UI:R/S:U/C:H/I:H/A:H
CNA and ADP enrichment extracted from CVE v5
These fields come from the CVE record and ADP containers, not from Glexia's Take. They preserve time-varying source decisions such as CISA SSVC, KEV status, CVSS metrics, and provider references.
CVSS vector scores
1 official scoreWe collect every scored CVSS vector available in the official CNA and ADP containers. When more than one version is present, the table keeps the source vectors side by side instead of collapsing them into the highest score.
CVSS:3.0/AV:L/AC:H/PR:L/UI:R/S:U/C:H/I:H/A:H0.85.9Primary CVE scoreVulnerability scoring details
Base CVSS 3.0 score
6.7MediumVector: CVSS:3.0/AV:L/AC:H/PR:L/UI:R/S:U/C:H/I:H/A:H
Source materials
- CVE List V5 sourceCVE List V5
- https://www.soliton.co.jp/support/2026/006679.htmlCVE reference
- https://jvn.jp/en/jp/JVN41357120/CVE reference
Products and packages named in the record
CWE details
CWE links open Glexia weakness intelligence pages with official CWE context, developer remediation guidance, and related CVE mappings.
Incorrect Default Permissions
Incorrect Default Permissions represents a recurring weakness pattern that can create exploitable paths when design, validation, or implementation controls are missing.