{"description":"Trending threats, MITRE ATT\u0026CK coverage, and detection metadata. Fed continuously.","feed_url":"https://feed.craftedsignal.io/tags/big-iq/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/"},{"_cs_actors":[],"_cs_cpes":[],"_cs_cves":[{"cvss":8.8,"id":"CVE-2026-41957"}],"_cs_exploited":false,"_cs_has_poc":false,"_cs_poc_references":[],"_cs_products":["BIG-IP","BIG-IQ"],"_cs_severities":["high"],"_cs_tags":["cve-2026-41957","rce","f5","big-ip","big-iq","authenticated","deserialization"],"_cs_type":"advisory","_cs_vendors":["F5 Networks"],"content_html":"\u003cp\u003eCVE-2026-41957 describes an authenticated remote code execution (RCE) vulnerability affecting the F5 BIG-IP and BIG-IQ Configuration utility. The specific attack vectors remain undisclosed. An attacker with valid credentials could exploit this vulnerability to execute arbitrary code on the target system. Given the critical role of BIG-IP and BIG-IQ in network infrastructure, successful exploitation can lead to significant disruption, data breaches, and further lateral movement within the network. Software versions which have reached End of Technical Support (EoTS) are not evaluated for this vulnerability.\u003c/p\u003e\n\u003ch2 id=\"attack-chain\"\u003eAttack Chain\u003c/h2\u003e\n\u003col\u003e\n\u003cli\u003eAttacker gains valid credentials to access the BIG-IP or BIG-IQ Configuration utility.\u003c/li\u003e\n\u003cli\u003eAttacker authenticates to the Configuration utility using the acquired credentials.\u003c/li\u003e\n\u003cli\u003eAttacker crafts a malicious request targeting the undisclosed vulnerable component within the Configuration utility.\u003c/li\u003e\n\u003cli\u003eThe malicious request triggers deserialization of untrusted data (CWE-502).\u003c/li\u003e\n\u003cli\u003eThe deserialization process leads to the execution of arbitrary code on the system.\u003c/li\u003e\n\u003cli\u003eAttacker establishes a reverse shell or other remote access mechanism.\u003c/li\u003e\n\u003cli\u003eAttacker performs post-exploitation activities, such as gathering sensitive information or moving laterally within the network.\u003c/li\u003e\n\u003c/ol\u003e\n\u003ch2 id=\"impact\"\u003eImpact\u003c/h2\u003e\n\u003cp\u003eSuccessful exploitation of CVE-2026-41957 can allow an authenticated attacker to execute arbitrary code on the affected BIG-IP or BIG-IQ system. This can lead to complete system compromise, allowing attackers to steal sensitive data, disrupt network services, and potentially pivot to other systems within the network. Given the central role of F5 products in many organizations\u0026rsquo; network infrastructure, the impact of this vulnerability could be significant.\u003c/p\u003e\n\u003ch2 id=\"recommendation\"\u003eRecommendation\u003c/h2\u003e\n\u003cul\u003e\n\u003cli\u003eApply the security updates released by F5 Networks to patch CVE-2026-41957 as soon as possible. Refer to F5\u0026rsquo;s advisory \u003ca href=\"https://my.f5.com/manage/s/article/K000156761\"\u003ehttps://my.f5.com/manage/s/article/K000156761\u003c/a\u003e for specific details and affected versions.\u003c/li\u003e\n\u003cli\u003eDeploy the Sigma rule \u0026ldquo;Detects CVE-2026-41957 Exploitation Attempt — Suspicious URI Access\u0026rdquo; to monitor web server logs for potential exploitation attempts.\u003c/li\u003e\n\u003cli\u003eImplement strong password policies and multi-factor authentication to reduce the risk of credential compromise, mitigating the initial access vector required to exploit CVE-2026-41957.\u003c/li\u003e\n\u003c/ul\u003e\n","date_modified":"2026-05-13T16:25:07Z","date_published":"2026-05-13T16:25:07Z","id":"https://feed.craftedsignal.io/briefs/2026-05-cve-2026-41957-rce/","summary":"An authenticated remote code execution vulnerability (CVE-2026-41957) exists in the F5 BIG-IP and BIG-IQ Configuration utility, potentially leading to arbitrary code execution on affected systems.","title":"CVE-2026-41957: F5 BIG-IP and BIG-IQ Authenticated Remote Code Execution Vulnerability","url":"https://feed.craftedsignal.io/briefs/2026-05-cve-2026-41957-rce/"}],"language":"en","title":"CraftedSignal Threat Feed — Big-Iq","version":"https://jsonfeed.org/version/1.1"}