{"description":"Trending threats, MITRE ATT\u0026CK coverage, and detection metadata. Fed continuously.","feed_url":"https://feed.craftedsignal.io/products/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/"},{"_cs_actors":[],"_cs_cpes":[],"_cs_cves":[{"cvss":8.7,"id":"CVE-2026-40698"}],"_cs_exploited":false,"_cs_has_poc":false,"_cs_poc_references":[],"_cs_products":["BIG-IP","BIG-IQ"],"_cs_severities":["high"],"_cs_tags":["privilege-escalation","snmp"],"_cs_type":"threat","_cs_vendors":["F5 Networks"],"content_html":"\u003cp\u003eCVE-2026-40698 is a privilege escalation vulnerability affecting F5 BIG-IP and BIG-IQ systems. A remote, authenticated attacker who possesses at least Resource Administrator privileges can exploit this vulnerability to gain higher-level privileges within the system. The vulnerability stems from the ability to create arbitrary SNMP configuration objects through either the iControl REST API or the TMOS shell (tmsh). This can lead to the attacker gaining unauthorized control over the affected system. Note that software versions which have reached End of Technical Support (EoTS) are not evaluated as part of this vulnerability disclosure.\u003c/p\u003e\n\u003ch2 id=\"attack-chain\"\u003eAttack Chain\u003c/h2\u003e\n\u003col\u003e\n\u003cli\u003eAttacker authenticates to the BIG-IP or BIG-IQ system with Resource Administrator privileges.\u003c/li\u003e\n\u003cli\u003eAttacker crafts a malicious SNMP configuration object using iControl REST API.\u003c/li\u003e\n\u003cli\u003eAttacker sends the malicious configuration object to the iControl REST endpoint.\u003c/li\u003e\n\u003cli\u003eAlternatively, attacker crafts a malicious SNMP configuration object using the TMOS shell (tmsh).\u003c/li\u003e\n\u003cli\u003eAttacker executes the crafted SNMP configuration object via the TMOS shell.\u003c/li\u003e\n\u003cli\u003eThe system processes the malicious SNMP configuration object.\u003c/li\u003e\n\u003cli\u003eThe malicious SNMP configuration object is created.\u003c/li\u003e\n\u003cli\u003eAttacker leverages the newly created SNMP configuration object to escalate privileges to gain unauthorized access.\u003c/li\u003e\n\u003c/ol\u003e\n\u003ch2 id=\"impact\"\u003eImpact\u003c/h2\u003e\n\u003cp\u003eSuccessful exploitation of CVE-2026-40698 allows an attacker with Resource Administrator privileges to escalate their privileges within the BIG-IP or BIG-IQ system. This can lead to complete system compromise, allowing the attacker to modify configurations, access sensitive data, and potentially disrupt services. The specific impact depends on the scope of the escalated privileges.\u003c/p\u003e\n\u003ch2 id=\"recommendation\"\u003eRecommendation\u003c/h2\u003e\n\u003cul\u003e\n\u003cli\u003eApply the security patch or upgrade to a fixed version of BIG-IP or BIG-IQ as recommended by F5 Networks to remediate CVE-2026-40698 (\u003ca href=\"https://my.f5.com/manage/s/article/K000160981)\"\u003ehttps://my.f5.com/manage/s/article/K000160981)\u003c/a\u003e.\u003c/li\u003e\n\u003cli\u003eDeploy the Sigma rule \u0026ldquo;Detect Suspicious SNMP Configuration via iControl REST\u0026rdquo; to detect potentially malicious SNMP configuration creation via iControl REST API.\u003c/li\u003e\n\u003cli\u003eDeploy the Sigma rule \u0026ldquo;Detect Suspicious SNMP Configuration via TMOS Shell\u0026rdquo; to detect potentially malicious SNMP configuration creation via TMOS shell.\u003c/li\u003e\n\u003c/ul\u003e\n","date_modified":"2026-05-13T16:23:30Z","date_published":"2026-05-13T16:23:30Z","id":"https://feed.craftedsignal.io/briefs/2026-05-cve-2026-40698-f5-privesc/","summary":"CVE-2026-40698 allows a highly privileged, authenticated attacker with Resource Administrator privileges in F5 BIG-IP and BIG-IQ systems to create SNMP configuration objects via iControl REST or TMOS shell (tmsh), resulting in privilege escalation.","title":"F5 BIG-IP and BIG-IQ iControl REST/TMOS Shell Privilege Escalation Vulnerability (CVE-2026-40698)","url":"https://feed.craftedsignal.io/briefs/2026-05-cve-2026-40698-f5-privesc/"},{"_cs_actors":[],"_cs_cpes":[],"_cs_cves":[{"cvss":8.7,"id":"CVE-2026-32643"}],"_cs_exploited":false,"_cs_has_poc":false,"_cs_poc_references":[],"_cs_products":["BIG-IP","BIG-IQ"],"_cs_severities":["high"],"_cs_tags":["cve","command execution","privilege escalation","f5"],"_cs_type":"advisory","_cs_vendors":["F5"],"content_html":"\u003cp\u003eCVE-2026-32643 is a vulnerability affecting F5 BIG-IP and BIG-IQ systems. A highly privileged, authenticated attacker possessing at least the Certificate Manager role can exploit this vulnerability. Successful exploitation allows the attacker to modify configuration objects, which in turn enables the execution of arbitrary commands on the affected system. This vulnerability poses a significant risk, potentially leading to complete system compromise if exploited. Software versions that 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 initial access and obtains valid credentials with at least Certificate Manager role privileges on the BIG-IP or BIG-IQ system.\u003c/li\u003e\n\u003cli\u003eAttacker authenticates to the BIG-IP or BIG-IQ management interface (GUI or API).\u003c/li\u003e\n\u003cli\u003eAttacker identifies configuration objects that can be modified to inject arbitrary commands. This may involve examining existing configuration settings or leveraging known vulnerable parameters.\u003c/li\u003e\n\u003cli\u003eAttacker modifies the identified configuration object to include malicious commands. This could involve injecting shell commands or scripts into fields that are later executed by the system.\u003c/li\u003e\n\u003cli\u003eAttacker triggers the execution of the modified configuration object. This may involve restarting services, applying configuration changes, or invoking specific functions within the BIG-IP or BIG-IQ system.\u003c/li\u003e\n\u003cli\u003eThe injected commands are executed with the privileges of the BIG-IP or BIG-IQ system, allowing the attacker to perform actions such as installing malware, creating new user accounts, or exfiltrating sensitive data.\u003c/li\u003e\n\u003cli\u003eAttacker leverages the command execution to further compromise the system or network, potentially gaining access to sensitive data or other systems.\u003c/li\u003e\n\u003c/ol\u003e\n\u003ch2 id=\"impact\"\u003eImpact\u003c/h2\u003e\n\u003cp\u003eSuccessful exploitation of CVE-2026-32643 allows an attacker to execute arbitrary commands on the affected BIG-IP or BIG-IQ system. This can lead to a complete compromise of the system, including the ability to install malware, steal sensitive data, or disrupt critical services. Given the central role of BIG-IP and BIG-IQ systems in network infrastructure, a successful attack could have widespread consequences, impacting numerous organizations.\u003c/p\u003e\n\u003ch2 id=\"recommendation\"\u003eRecommendation\u003c/h2\u003e\n\u003cul\u003e\n\u003cli\u003eApply the security patch or upgrade to a non-vulnerable version of BIG-IP or BIG-IQ as recommended by F5. Refer to F5\u0026rsquo;s advisory \u003ca href=\"https://my.f5.com/manage/s/article/K000160972\"\u003ehttps://my.f5.com/manage/s/article/K000160972\u003c/a\u003e for specific instructions.\u003c/li\u003e\n\u003cli\u003eRestrict access to the BIG-IP and BIG-IQ management interface to only authorized personnel and enforce strong authentication measures.\u003c/li\u003e\n\u003cli\u003eReview existing user roles and permissions to ensure that only necessary privileges are granted. Limit the number of users with the Certificate Manager role.\u003c/li\u003e\n\u003c/ul\u003e\n","date_modified":"2026-05-13T16:20:37Z","date_published":"2026-05-13T16:20:37Z","id":"https://feed.craftedsignal.io/briefs/2026-05-cve-2026-32643/","summary":"CVE-2026-32643 describes a vulnerability in F5 BIG-IP and BIG-IQ systems that allows a highly privileged, authenticated attacker with the Certificate Manager role to modify configuration objects, leading to arbitrary command execution.","title":"CVE-2026-32643: F5 BIG-IP and BIG-IQ Authenticated Command Execution","url":"https://feed.craftedsignal.io/briefs/2026-05-cve-2026-32643/"}],"language":"en","title":"CraftedSignal Threat Feed — BIG-IQ","version":"https://jsonfeed.org/version/1.1"}