[UPDATE] [hoch] Netgate pfSense: Mehrere Schwachstellen

highCVE-2026-56126 CVE-2026-56127 CVE-2026-56128 CVE-2026-67189

Ein entfernter, authentisierter Angreifer kann mehrere Schwachstellen in Netgate pfSense ausnutzen, um beliebigen Programmcode auszuführen, Cross-Site-Scripting-Angriffe durchzuführen, Daten zu manipulieren oder vertrauliche Informationen offenzulegen.

CSIRTS triage

vendor: Netgate product: pfSense Remote code execution Cross-site scriptingOtherInformation disclosure

What: Multiple vulnerabilities permit remote authenticated attackers to execute code, perform XSS, manipulate data, or disclose information.
Who is affected: pfSense deployments with authenticated user access.
Urgency: High severity with remote code execution capability; treat as critical.
Action: Apply patches for CVE-2026-56126, CVE-2026-56127, CVE-2026-56128, and CVE-2026-67189 immediately.

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: high
Published: 2026-09-04
Exploitation: Not in CISA KEV at last sync

Original advisory: https://wid.cert-bund.de/portal/wid/securityadvisory?name=WID-SEC-2026-2836

Exploitation outlook

EPSS (FIRST.org) estimates each CVE’s probability of exploitation in the next 30 days — here is the CSIRTS.com read on those numbers.

Low exploitation riskCVE-2026-561260.37% 30-day exploitation probability — currently an unlikely target, but scores change as exploit code circulates. Riskier than 30% of all EPSS-scored CVEs.
Low exploitation riskCVE-2026-561270.37% 30-day exploitation probability — currently an unlikely target, but scores change as exploit code circulates. Riskier than 30% of all EPSS-scored CVEs.
Low exploitation riskCVE-2026-561280.37% 30-day exploitation probability — currently an unlikely target, but scores change as exploit code circulates. Riskier than 30% of all EPSS-scored CVEs.
Low exploitation riskCVE-2026-671890.53% 30-day exploitation probability — currently an unlikely target, but scores change as exploit code circulates. Riskier than 43% of all EPSS-scored CVEs.

Referenced CVEs

CVE	CSIRTS overview	External
CVE-2026-56126	coverage & exploitation status	NVD · CVE.org
CVE-2026-56127	coverage & exploitation status	NVD · CVE.org
CVE-2026-56128	coverage & exploitation status	NVD · CVE.org
CVE-2026-67189	coverage & exploitation status	NVD · CVE.org

Same CVEs, other sources

How other CERTs, PSIRTs and databases cover the vulnerabilities in this advisory.

Recent advisories for Netgate pfSense

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.

medium[UPDATE] [mittel] Netgate pfSense: Schwachstelle ermöglicht Cross-Site Scriptingcert-bund · 2026-09-07
high[UPDATE] [hoch] Netgate pfSense Plus und CE: Mehrere Schwachstellencert-bund · 2026-09-07
unknownCVE-2026-78849: Cross Site Scripting vulnerability in Netgate pfSense Plus software versions <= 26.03 pfSense …nvd · 2026-09-04
mediumCVE-2026-38961: Cross-Site Scripting (XSS) vulnerability in the RSS Widget of Netgate pfSense Plus (versions 2…nvd · 2026-09-04