The Sophos UTM VPN endpoint interacts with client software provided by NPC Engineering (www.ncp-e.com)
Published Apr 9, 2019
8.1
HIGHCVSS 3.0
EPSS 0.61%
Description
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.
Affected products
No data.
- 10.11
- 11.04
No data.
No Red Hat product state for this CVE.
No package ranges for this CVE.
Remediation
No remediation recorded yet.
Metrics
No CVSS v4.0 score for this CVE.
No CVSS v3.1 score for this CVE.
CVSS:3.0/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H
AV:N/AC:M/Au:N/C:C/I:C/A:C
This CVE is not in the KEV list.
No CISA SSVC assessment for this CVE yet.
Estimated probability of exploitation in the wild in the next 30 days (FIRST EPSS). As of Oct 1, 2026.
Score over time
2021–2026- EPSS v1
- EPSS v5
- EPSS v2
- EPSS v3
Percentile over time
- EPSS v1
- EPSS v5
- EPSS v2
- EPSS v3
Table of values (9 key points)
Flat stretches are collapsed; showing up to 120 newest points.
| Date | Score | Percentile | Model |
|---|---|---|---|
| Oct 1, 2026 | 0.61% (0.00611) | 47.36th | v5 (v2026.06.15) |
| Sep 20, 2026 | 0.61% (0.00611) | 47.91th | v5 (v2026.06.15) |
| Jul 20, 2024 | 0.16% (0.00159) | 52.81th | v3 (v2023.03.01) |
| Jun 28, 2024 | 0.16% (0.00159) | 52.64th | v3 (v2023.03.01) |
| Mar 7, 2023 | 0.16% (0.00159) | 50.62th | v3 (v2023.03.01) |
| Mar 6, 2023 | 0.89% (0.00885) | 27.89th | v2 (v2022.01.01) |
| Feb 4, 2022 | 0.89% (0.00885) | 10.50th | v2 (v2022.01.01) |
| Feb 3, 2022 | 0.62% (0.00624) | 17.80th | v5 (v2026.06.15) |
| Apr 14, 2021 | 0.62% (0.00624) | 0.00th | v1 |
References (2)
- https://www.ncp-e.com/en/resources/download-vpn-client/#c8680 x_refsource_MISCVendor Advisory
- https://www.ncp-e.com/fileadmin/pdf/service_support/release_notes/NCP_Secure_Clients/NCP_Secure_Entry_Client/NCP_RN_Win_Secure_Entry_Client_11_14_r42039_en.pdf x_refsource_CONFIRMVendor Advisory
| Link | Providers | Tags |
|---|---|---|
| https://www.ncp-e.com/en/resources/download-vpn-client/#c8680 | x_refsource_MISCVendor Advisory | |
| https://www.ncp-e.com/fileadmin/pdf/service_support/release_notes/NCP_Secure_Clients/NCP_Secure_Entry_Client/NCP_RN_Win_Secure_Entry_Client_11_14_r42039_en.pdf | x_refsource_CONFIRMVendor Advisory |
Change history (0)
No recorded changes yet.