{"description":"Trending threats, MITRE ATT\u0026CK coverage, and detection metadata. Fed continuously.","feed_url":"https://feed.craftedsignal.io/tags/cve-2026-42406/feed.json","home_page_url":"https://feed.craftedsignal.io/","items":[{"_cs_actors":[],"_cs_cpes":[],"_cs_cves":[{"cvss":8.7,"id":"CVE-2026-42406"}],"_cs_exploited":false,"_cs_has_poc":false,"_cs_poc_references":[],"_cs_products":["BIG-IP","BIG-IQ"],"_cs_severities":["high"],"_cs_tags":["cve","cve-2026-42406","f5","big-ip","big-iq","rce","authenticated","privilege escalation"],"_cs_type":"advisory","_cs_vendors":["F5 Networks"],"content_html":"\u003cp\u003eCVE-2026-42406 is a vulnerability affecting F5 BIG-IP and BIG-IQ systems. A threat actor with high privileges and valid authentication credentials, specifically requiring at least the Certificate Manager role, can exploit this flaw. By modifying configuration objects within the system, the attacker can inject and execute arbitrary commands. This vulnerability poses a significant risk to organizations using these F5 products, as successful exploitation can lead to complete system compromise and unauthorized access to sensitive data. Software versions which have reached End of Technical Support (EoTS) are not evaluated.\u003c/p\u003e\n\u003ch2 id=\"attack-chain\"\u003eAttack Chain\u003c/h2\u003e\n\u003col\u003e\n\u003cli\u003eThe attacker gains initial access to the BIG-IP or BIG-IQ system through valid credentials with at least Certificate Manager privileges.\u003c/li\u003e\n\u003cli\u003eThe attacker authenticates to the administrative interface of the BIG-IP or BIG-IQ system.\u003c/li\u003e\n\u003cli\u003eThe attacker identifies modifiable configuration objects within the system.\u003c/li\u003e\n\u003cli\u003eThe attacker modifies a configuration object to inject malicious commands.\u003c/li\u003e\n\u003cli\u003eThe system processes the modified configuration object.\u003c/li\u003e\n\u003cli\u003eThe injected commands are executed within the system context.\u003c/li\u003e\n\u003cli\u003eThe attacker achieves arbitrary command execution on the system.\u003c/li\u003e\n\u003cli\u003eThe attacker leverages the executed commands to escalate privileges, move laterally within the network, or exfiltrate sensitive data.\u003c/li\u003e\n\u003c/ol\u003e\n\u003ch2 id=\"impact\"\u003eImpact\u003c/h2\u003e\n\u003cp\u003eSuccessful exploitation of CVE-2026-42406 can lead to complete compromise of the BIG-IP or BIG-IQ system. This can result in unauthorized access to sensitive data, disruption of services, and the potential for further lateral movement within the network. Given the critical role that BIG-IP and BIG-IQ systems play in network infrastructure, a successful attack can have significant consequences for affected organizations.\u003c/p\u003e\n\u003ch2 id=\"recommendation\"\u003eRecommendation\u003c/h2\u003e\n\u003cul\u003e\n\u003cli\u003eApply the mitigations recommended in F5\u0026rsquo;s security advisory [https://my.f5.com/manage/s/article/K000160971].\u003c/li\u003e\n\u003cli\u003eMonitor authentication logs for suspicious login activity to the BIG-IP or BIG-IQ administrative interface.\u003c/li\u003e\n\u003cli\u003eDeploy the Sigma rule detecting configuration changes by highly privileged accounts to your SIEM and tune for your environment.\u003c/li\u003e\n\u003cli\u003eReview user roles and permissions to ensure the principle of least privilege is enforced.\u003c/li\u003e\n\u003c/ul\u003e\n","date_modified":"2026-05-13T16:25:19Z","date_published":"2026-05-13T16:25:19Z","id":"https://feed.craftedsignal.io/briefs/2026-05-cve-2026-42406-f5-rce/","summary":"CVE-2026-42406 allows a highly privileged, authenticated attacker with the Certificate Manager role to modify configuration objects in F5 BIG-IP and BIG-IQ systems, leading to arbitrary command execution.","title":"CVE-2026-42406 - F5 BIG-IP and BIG-IQ Authenticated Remote Code Execution","url":"https://feed.craftedsignal.io/briefs/2026-05-cve-2026-42406-f5-rce/"}],"language":"en","title":"CraftedSignal Threat Feed — Cve-2026-42406","version":"https://jsonfeed.org/version/1.1"}