Read the docs
TI-2017-12501 Aliases CVE-2017-17023GHSA-3qwr-mfh2-wggm

The Sophos UTM VPN endpoint interacts with client software provided by NPC Engineering…

Priority LOW 36CWE-345Published · Updated

Key facts

Attack vector
Network
Privileges required
None
User interaction
None
Attack complexity
High
Impact type
Security bypass
Confidentiality · integrity · availability
High · High · High
Fix status
No fix listed

Attack profile from CVSS 3.0 · NVD. Fix status from CNA. Impact type from CWE-345.

Summary

The Sophos UTM VPN endpoint interacts with client software provided by NPC Engineering (www.ncp-e.com). The affected client software, "Sophos IPSec Client" 11.04 is a rebranded version of NCP "Secure Entry Client" 10.11 r32792. A vulnerability in the software update feature of the VPN client allows a man-in-the-middle (MITM) or man-on-the-side (MOTS) attacker to execute arbitrary, malicious software on a target user's computer. This is related to SIC_V11.04-64.exe (Sophos), NCP_EntryCl_Windows_x86_1004_31799.exe (NCP), and ncpmon.exe (both Sophos and NCP). The vulnerability exists because: (1) the VPN client requests update metadata over an insecure HTTP connection; and (2) the client software does not check if the software update is signed before running it.

Why it matters now

EPSS 0.00611 49th percentileScored 2026-11-07
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
——all versions—No fix listedCNA
  • — Vendor— Affected all versions Fixed in — No fix listed CNA

CPE configurations NVD · 2

CPEVersionsRoleVendor
cpe:2.3:a:ncp-e:ncp_secure_entry_client:10.11:32792:*:*:*:windows:*:*10.11 32792Vulnerablencp-e
cpe:2.3:a:sophos:ipsec_client:11.04:*:*:*:*:*:*:*11.04VulnerableSophos
  • cpe:2.3:a:ncp-e:ncp_secure_entry_client:10.11:32792:*:*:*:windows:*:* Versions 10.11 32792 Vulnerable ·ncp-e
  • cpe:2.3:a:sophos:ipsec_client:11.04:*:*:*:*:*:*:* Versions 11.04 Vulnerable ·Sophos

Remediation

No fixed version listed by the sources yet.

Timeline

  1. 2026-10-02 Threatist record created from CVE-2017-17023
  2. 2026-10-03 Alias added: GHSA-3qwr-mfh2-wggm

References

Advisory 2

Sources

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