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CVE-2026-41959— iControl and tmsh REST vulnerability

CVSS 6.5 · Medium EPSS 0.20% · P10

Possible ATT&CK Techniques 1AI

T1040 · Network Sniffing

Affected Version Matrix 6

VendorProductVersion RangeStatus
F5BIG-IP21.1.0< *unaffected
21.0.0< 21.0.0.2affected
17.5.0< 17.5.1.6affected
17.1.0< 17.1.3.2affected
16.1.0< *affected
F5BIG-IQ8.4.0< *affected
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I. Basic Information for CVE-2026-41959

Vulnerability Information
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Vulnerability Title
iControl and tmsh REST vulnerability
Source: CVE Program / CVE List V5
Vulnerability Description
Incorrect permission assignment vulnerabilities exist in BIG-IP and BIG-IQ TMOS Shell (tmsh) network diagnostics commands and in BIG-IP iControl REST. These vulnerabilities may allow an authenticated attacker to view the network status of destination systems.  Note: Software versions which have reached End of Technical Support (EoTS) are not evaluated.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:C/C:H/I:N/A:N
Source: CVE Program / CVE List V5
Vulnerability Type
关键资源的不正确权限授予
Source: CVE Program / CVE List V5
Vulnerability Title
F5 BIG-IP和F5 BIG-IQ 安全漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
F5 BIG-IP和F5 BIG-IQ都是美国F5公司的产品。F5 BIG-IP是一款集成了网络流量管理、应用程序安全管理、负载均衡等功能的应用交付平台。F5 BIG-IQ是一套基于软件的云管理解决方案。该方案支持跨公共和私有云、传统数据中心和混合环境部署应用交付和网络服务。 F5 BIG-IP和F5 BIG-IQ存在安全漏洞，该漏洞源于TMOS Shell网络诊断命令和BIG-IP iControl REST权限分配不正确，允许已认证攻击者查看目标系统的网络状态。
Source: CNNVD (China National Vulnerability Database)
CVSS Information
N/A
Source: CNNVD (China National Vulnerability Database)
Vulnerability Type
N/A
Source: CNNVD (China National Vulnerability Database)

Affected Products

VendorProductAffected VersionsCPESubscribe
F5BIG-IP 21.1.0 ~ * -
F5BIG-IQ 8.4.0 ~ * -

II. Public POCs for CVE-2026-41959

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III. Intelligence Information for CVE-2026-41959

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Vendor Advisories for CVE-2026-41959 (1)

Same Patch Batch · F5 · 2026-05-13 · 51 CVEs total

CVE-2026-412259.1 CRITICALiControl REST vulnerability
CVE-2026-419578.8 HIGHBIG-IP and BIG-IQ Configuration utility vulnerability
CVE-2026-341768.7 HIGHKnowledge Appliance mode iControl REST vulnerability
CVE-2026-400618.7 HIGHiControl REST and tmsh vulnerability
CVE-2026-429308.7 HIGHAppliance mode iControl REST vulnerability
CVE-2026-326738.7 HIGHBIG-IP scripted monitor vulnerability
CVE-2026-209168.1 HIGHBIG-IQ iControl REST vulnerability
CVE-2026-429458.1 HIGHNGINX ngx_http_rewrite_module vulnerability
CVE-2026-412177.9 HIGHBIG-IP tmsh vulnerability
CVE-2026-412277.5 HIGHBIG-IP HTTP/2 Layer 7 Dos Protection vulnerability
CVE-2026-412187.5 HIGHBIG-IP PEM iRules vulnerability
CVE-2026-424097.5 HIGHBIG-IP HTTP/2 vulnerability
CVE-2026-429207.5 HIGHBIG-IP DTLS Vulnerability
CVE-2026-394587.5 HIGHBIG-IP DNS Cache vulnerability
CVE-2026-394557.5 HIGHBIG-IP Configuration utility vulnerability
CVE-2026-404237.5 HIGHBIG-IP SIP profile vulnerability
CVE-2026-400677.5 HIGHBIG-IP APM Vulnerability
CVE-2026-400607.5 HIGHBIG-IP Advanced WAF and ASM vulnerability
CVE-2026-406187.5 HIGHBIG-IP SSL/TLS vulnerability
CVE-2026-406297.5 HIGHBIG-IP SSL/TLS vulnerability

Showing top 20 of 51 CVEs. View all on vendor page &rarr; →

IV. Related Vulnerabilities

Same product: BIG-IP
Same vendor: F5
Same weakness: CWE-732

V. Comments for CVE-2026-41959

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