Multiple vulnerabilities in OpenVPN

Advisory ID CVE Number Date discovered Severity Advisory revision
STORM-2026-015 CVE-2026-35058 , CVE-2026-40215 05/05/2026 medium v1

Vulnerability details

Some security flaws have been discovered in OpenVPN, that can lead to a Denial of Service (DoS) or a memory leak.

Impacted products

ProductsSeverityDetail
Stormshield Network Security medium SNS is impacted

Revisions

Version Date Description
v1 08/13/2026 Initial release


Stormshield Network Security

CVSS v3.1 Overall Score: 5.2      

Analysis

Impacted version

Two vulnerabilities identified in the handling of control‑channel packets and the concurrent management of TLS sessions allow a malicious third party to compromise the availability and confidentiality of the VPN service.
  • SNS 5.1.0 to 5.1.1
  • SNS 5.0.0 to 5.0.7
  • SNS 4.8.0 to 4.8.17

Workaround solution

Solution

There is no workaround solution.

The following updates will fix this vulnerability:

  • SNS 5.1.2
  • SNS 5.0.8
  • SNS 4.8.18


Attack Vector Attack Complexity Privileges Required User Interaction Scope Confidentiality Impact Integrity Impact Availability impact
Network High High None Unchanged Low None Low
CVSS Base score: 3.3 CVSS Vector: (AV:N/AC:H/PR:H/UI:N/S:U/C:L/I:N/A:L)
Exploit Code Maturity Remediation Level Report Confidence
Unproven that exploit exists Official fix Confirmed
CVSS Temporal score: 2.9 CVSS Vector: (AV:N/AC:H/PR:H/UI:N/S:U/C:L/I:N/A:L/E:U/RL:O/RC:C)
Attack Vector (MAV) Attack Complexity (MAC) Privileges Required (MPR) User Interaction (MUI) Scope (MS)
Network High High None Unchanged
Confidentiality Impact (MC) Integrity Impact (MI) Availability Impact (MA)
High None High
Confidentiality Requirement (CR) Integrity Requirement (IR) Availability Requirement (AR)
Medium Low Medium
CVSS Environmental score: 5.2 CVSS Vector: (AV:N/AC:H/PR:H/UI:N/S:U/C:L/I:N/A:L/E:U/RL:O/RC:C/CR:M/IR:L/AR:M/MAV:N/MAC:H/MPR:H/MUI:N/MS:U/MC:H/MI:N/MA:H)