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[NEW] [medium] OPNsense: Vulnerability allows bypass of security measures

medium
An attacker from an adjacent network can exploit a vulnerability in OPNsense to bypass security measures.

CSIRTS triage

vendor: OPNsenseproduct: OPNsenseAuthentication bypass
What
Vulnerability allows an attacker from an adjacent network to bypass security measures.
Who is affected
OPNsense deployments exposed to adjacent network attackers.
Urgency
Medium severity; adjacent network access requirement limits exposure but should be patched promptly.
Action
Apply OPNsense security updates to address the bypass vulnerability.

AI-assisted analysis generated from the source advisory — verify against the original.

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Details

Source
CERT-Bund (BSI) Security Advisories (DE · national-cert · site)
Severity
medium
Published
2026-08-26
Exploitation
Not in CISA KEV at last sync
Language
Machine-translated to English — verify against the original

Original advisory: https://wid.cert-bund.de/portal/wid/securityadvisory?name=WID-SEC-2026-3032

Recent advisories for OPNsense

A cluster of recent advisories against the same product widens the attack surface — attackers routinely chain freshly published CVEs on one product, so review these together.

More from CERT-Bund (BSI) Security Advisories