F5 BIG-IP: Mehrere Schwachstellen
WID-SEC-2026-3158 · first 03.09.2026 · updated 03.09.2026 · CVSS 8,8
What it is about
BIG-IP ist eine Netzwerk Appliance auf der die meisten F5 Produkte laufen. Ein Angreifer kann mehrere Schwachstellen in F5 BIG-IP ausnutzen, um falsche Informationen darzustellen und um Administratorrechte zu erlangen.
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
- falsche Informationen darzustellen
- Administratorrechte zu erlangen
Am I affected?
Affected according to the BSI:
- F5 BIG-IP <21.1.0.1
- F5 BIG-IP <21.0.0.3
- F5 BIG-IP <17.5.1.8
- F5 BIG-IP <17.1.3.4
The installed version is usually shown under “Help → About” or in the device’s admin interface.
What helps?
Update to at least:
- F5 BIG-IP 21.1.0.1
- F5 BIG-IP 21.0.0.3
- F5 BIG-IP 17.5.1.8
- F5 BIG-IP 17.1.3.4
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)
- F5 Security Advisory vom 2026-09-02 my.f5.com
- F5 Security Advisory vom 2026-09-02 my.f5.com
- GitHub Security Advisory GHSA-7f8w-84hq-vpww vom 2026-09-02 github.com
- GitHub Security Advisory GHSA-CGM7-WQWH-H7HH vom 2026-09-02 github.com
CVE: CVE-2026-63020, CVE-2026-66842
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.