CVE-2026-41957: RCE in F5 BIG-IP Configuration Utility
Plattform
linux
Komponente
bigip
Behoben in
17.5.1.4
CVE-2026-41957 describes an authenticated remote code execution (RCE) vulnerability discovered in F5 BIG-IP and BIG-IQ Configuration utility. This flaw allows an attacker with valid credentials to execute arbitrary code through undisclosed vectors within the Configuration utility. The vulnerability impacts versions 16.1.0 through 17.5.1.4, and a fix is available in version 17.5.1.4.
Auswirkungen und Angriffsszenarien
Successful exploitation of CVE-2026-41957 could allow an attacker to gain complete control over the affected BIG-IP or BIG-IQ system. This includes the ability to modify system configurations, steal sensitive data (such as user credentials, SSL certificates, and network configurations), install malware, and potentially pivot to other systems on the network. Given the critical role BIG-IP often plays in network infrastructure, a successful attack could lead to widespread disruption and data breaches. The undisclosed nature of the vectors makes proactive defense challenging, requiring immediate patching.
Ausnutzungskontext
CVE-2026-41957 was published on May 13, 2026. The vulnerability's severity is rated HIGH (CVSS 8.8). The undisclosed nature of the attack vectors increases the potential for exploitation, as defenders lack specific signatures to detect and prevent attacks. Public proof-of-concept (POC) code is currently unavailable, but the potential for exploitation is considered medium due to the RCE nature and the widespread use of BIG-IP in critical infrastructure. Refer to the F5 security advisory for further details.
Bedrohungsanalyse
Exploit-Status
CISA SSVC
CVSS-Vektor
Was bedeuten diese Metriken?
- Attack Vector
- Netzwerk — aus der Ferne über das Internet ausnutzbar. Kein physischer oder lokaler Zugriff erforderlich.
- Attack Complexity
- Niedrig — keine besonderen Bedingungen erforderlich. Zuverlässig ausnutzbar.
- Privileges Required
- Niedrig — jedes gültige Benutzerkonto ist ausreichend.
- User Interaction
- Keine — automatischer und lautloser Angriff. Das Opfer tut nichts.
- Scope
- Unverändert — Auswirkung auf das anfällige Komponente beschränkt.
- Confidentiality
- Hoch — vollständiger Vertraulichkeitsverlust. Angreifer kann alle Daten lesen.
- Integrity
- Hoch — Angreifer kann beliebige Daten schreiben, ändern oder löschen.
- Availability
- Hoch — vollständiger Absturz oder Ressourcenerschöpfung. Totaler Denial of Service.
Betroffene Software
Schwachstellen-Klassifikation (CWE)
Zeitleiste
- Reserviert
- Veröffentlicht
Mitigation und Workarounds
The primary mitigation for CVE-2026-41957 is to upgrade to version 17.5.1.4 or later. Before upgrading, review F5's release notes for potential compatibility issues and test the upgrade in a non-production environment. If an immediate upgrade is not possible, consider implementing stricter authentication controls and limiting access to the Configuration utility to only authorized personnel. While a WAF or proxy may offer some protection, it is unlikely to be effective against undisclosed vectors. Monitor BIG-IP logs for any unusual activity or attempts to access the Configuration utility from unauthorized sources.
So behebenwird übersetzt…
F5 recomienda aplicar las actualizaciones de seguridad proporcionadas en el aviso de seguridad correspondiente (K000156761). Estas actualizaciones corrigen la vulnerabilidad de ejecución remota de código. Consulte la documentación de F5 para obtener instrucciones detalladas sobre cómo aplicar las actualizaciones.
Häufig gestellte Fragen
What is CVE-2026-41957 — RCE in F5 BIG-IP Configuration Utility?
CVE-2026-41957 is a HIGH severity remote code execution vulnerability affecting F5 BIG-IP and BIG-IQ Configuration utility versions 16.1.0 through 17.5.1.4. An authenticated attacker can execute arbitrary code through undisclosed vectors.
Am I affected by CVE-2026-41957 in F5 BIG-IP Configuration Utility?
If you are running F5 BIG-IP or BIG-IQ Configuration utility versions 16.1.0 through 17.5.1.4, you are potentially affected by this vulnerability. Verify your version and upgrade immediately.
How do I fix CVE-2026-41957 in F5 BIG-IP Configuration Utility?
Upgrade to version 17.5.1.4 or later. Review F5's release notes and test the upgrade in a non-production environment before applying it to production systems.
Is CVE-2026-41957 being actively exploited?
While no public exploits are currently available, the vulnerability's RCE nature and the lack of specific mitigation measures suggest a high likelihood of exploitation. Monitor your systems closely.
Where can I find the official F5 advisory for CVE-2026-41957?
Refer to the official F5 security advisory for CVE-2026-41957 on the F5 website. Search for 'F5 Security Advisory CVE-2026-41957' to locate the relevant page.
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