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TI-2018-02974 Aliases CVE-2018-4006GHSA-77gm-qcq9-fqc2

Improper input validation in Shimo VPN

Priority LOW 35CWE-20Published · Updated

Key facts

Attack vector
Local
Privileges required
Low
User interaction
None
Attack complexity
Low
Impact type
—
Confidentiality · integrity · availability
High · High · High
Fix status
No fix listed

Attack profile from CVSS 3.1 · NVD. Fix status from CNA.

Summary

An exploitable privilege escalation vulnerability exists in the Shimo VPN 4.1.5.1 helper service in the writeConfig functionality. A non-root user is able to write a file anywhere on the system. A user with local access can use this vulnerability to raise their privileges to root. An attacker would need local access to the machine to exploit it successfully.

Why it matters now

EPSS 0.0068 52nd percentileScored 2026-11-07
Public exploit Yes 1 exploit referenceTagged by NVD
Fix No fix listed No fixed version in the sources yet

SSVC decision points

Not available: CISA has not published SSVC decision points for this record.

Affected products

VendorProductAffected versionsFixed inStatusSource
—Shimo VPNShimo VPN 4.1.5.1—No fix listedCNA
  • Shimo VPN Vendor— Affected Shimo VPN 4.1.5.1 Fixed in — No fix listed CNA

CPE configurations NVD · 1

CPEVersionsRoleVendor
cpe:2.3:a:shimovpn:shimo_vpn:4.1.5.1:*:*:*:*:*:*:*4.1.5.1VulnerableShimovpn
  • cpe:2.3:a:shimovpn:shimo_vpn:4.1.5.1:*:*:*:*:*:*:* Versions 4.1.5.1 Vulnerable ·Shimovpn

Remediation

No fixed version listed by the sources yet.

Timeline

  1. 2026-10-02 Threatist record created from CVE-2018-4006
  2. 2026-10-03 Alias added: GHSA-77gm-qcq9-fqc2

References

Exploit 1

  • TI-2018-02973 Improper input validation in Shimo VPN CVSS 3.1HIGH 7.8
  • TI-2018-02977 An exploitable privilege escalation vulnerability exists in the Shimo VPN helper service… CVSS 3.1HIGH 7.8
  • TI-2018-02976 Improper privilege management in Shimo VPN CVSS 3.1HIGH 7.8
  • TI-2018-02975 Improper input validation in Shimo VPN CVSS 3.1HIGH 7.1
  • TI-2018-02972 Improper input validation in Shimo VPN CVSS 3.1MEDIUM 5.5

Sources

This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences