Arista EOS: Mehrere Schwachstellen
WID-SEC-2025-2639 · first 19.11.2025 · updated 08.06.2026 · CVSS 8,3
What it is about
Arista Extensible Operating System (EOS) ist ein modulares Linux basiertes Netzwerkbetriebssystem. Ein Angreifer kann mehrere Schwachstellen in Arista EOS ausnutzen, um einen Denial of Service Angriff durchzuführen, und um seine Privilegien zu erhöhen.
Under what conditions?
The BSI does not name any particular preconditions. Exploitable remotely according to the BSI.
What can happen in the worst case
An attacker could use the vulnerability to
- einen Denial of Service Angriff durchzuführen
- seine Privilegien zu erhöhen
Am I affected?
Affected according to the BSI:
- Arista EOS <4.34.2F
- Arista EOS <4.33.5M
- Arista EOS <4.32.7M
- Arista EOS <4.31.9M
The installed version is usually shown under “Help → About” or in the device’s admin interface.
What helps?
Update to at least:
- Arista EOS 4.34.2F
- Arista EOS 4.33.5M
- Arista EOS 4.32.7M
- Arista EOS 4.31.9M
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
- Original BSI advisory (WID)
- Arista Security Advisory 0126 vom 2025-11-18 www.arista.com
- Arista Security Advisory 0127 vom 2025-11-18 www.arista.com
CVE: CVE-2025-5089, CVE-2025-5090, CVE-2025-8873, CVE-2025-5088
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.