CVE-2026-82312

Local service interruption via insecure IPC object permissions

Published Sep 7, 2026 · Updated Sep 8, 2026

Denial of service in OpenVPN 2.0.0 through 2.6.22 and 2.7_alpha1 through 2.7.6 on Windows allows local users to interrupt VPN processes. The Windows code creates the --service exit event and netsh.exe guard semaphore with a NULL DACL, letting a local user signal or indefinitely hold them. Exposure is limited to setups that omit the interactive service or use the automatic service to start and stop OpenVPN; interference stops other users' processes.

CVSS severity1.8
Low
EPSS probability0.10%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Denial of service in OpenVPN 2.0.0 through 2.6.22 and 2.7_alpha1 through 2.7.6 on Windows allows local users to interrupt VPN processes. The Windows code creates the --service exit event and netsh.exe guard semaphore with a NULL DACL, letting a local user signal or indefinitely hold them. Exposure is limited to setups that omit the interactive service or use the automatic service to start and stop OpenVPN; interference stops other users' processes.

The record

CVE
CVE-2026-82312
Published
Sep 7, 2026
Updated
Sep 8, 2026
Vendor
OpenVPN Inc.
Product
OpenVPN
Classifications
CWE-412, CWE-732, T1489
Attack vector
local
Privileges
authenticated

Timeline

How it unfolded

  1. Sep 7, 2026CVE publishedPublication date reported by the CVE source.
  2. Sep 8, 2026Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

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Is a vulnerable build present?

Compare these published version ranges with your installed build and any vendor patches.

  1. Affected versionversion=2.0.0 <=2.6.22
  2. Affected versionversion=2.7_alpha1 <=2.7.6

What conditions does exploitation require?

Attack vectorlocal
Required privilegesauthenticated

What is affected?

OpenVPN Inc. · OpenVPNversion=2.0.0 <=2.6.22; version=2.7_alpha1 <=2.7.6

Published CVSS scores

1.8OpenVPNCVSS:4.0/AV:L/AC:L/AT:P/PR:L/UI:P/VC:N/VI:N/VA:L/SC:N/SI:N/SA:H

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.

Daily unique IPsNo honeypot observations are available for this CVE in the selected window.

No observations available

Sep 10, 2026Sep 16, 2026
Latest reporting daySep 16, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectorlocal
Privilegesauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-412Unrestricted Externally Accessible Lock
CWE-732Incorrect Permission Assignment for Critical Resource
T1489Service Stop

Public exploit references

No public exploit references are available in this record.

Labels summarize the accepted research assessment. They do not indicate a test against your environment.

Technologies

Your stack

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Your stack

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