rsyslog: Schwachstelle ermöglicht Denial of Service
WID-SEC-2026-3473 · first 21.09.2026 · updated 21.09.2026 · CVSS 7,5
What it is about
rsyslog ist ein erweiterter, multithread syslog Dämon der MySQL, syslog/TCP, RFC 3195, "permitted sender" Listen, Filterfunktionen für einzelne Nachrichtenteile und eine fein granulierte Steuerung des Ausgabeformates bietet. Ein entfernter, anonymer Angreifer kann eine Schwachstelle in rsyslog ausnutzen, um einen Denial of Service Angriff durchzuführen.
Under what conditions?
Over the network and without logging in. This is the most dangerous combination: attackers can scan reachable devices automatically.
What can happen in the worst case
An attacker could use the vulnerability to
- einen Denial of Service Angriff durchzuführen
Am I affected?
Affected according to the BSI:
- Open Source rsyslog <8.2606.0
The installed version is usually shown under “Help → About” or in the device’s admin interface.
What helps?
Update to at least:
- Open Source rsyslog 8.2606.0
Is the vulnerability already being exploited?
None of the CVEs is in the CISA catalogue of exploited vulnerabilities. That does not mean there are no attacks, only that none are documented.
Information and sources
Source: BSI warning and information service (CERT-Bund); CISA. The assessment of the conditions is my reading of the BSI text; the external pages are in their original language.