CVE-2026-42920— BIG-IP DTLS Vulnerability
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I. Basic Information for CVE-2026-42920
Vulnerability Information
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Vulnerability Title
BIG-IP DTLS Vulnerability
Source: NVD (National Vulnerability Database)
Vulnerability Description
When a Client SSL profile is configured with Allow Dynamic Record Sizing on a UDP virtual server, undisclosed traffic can cause the Traffic Management Microkernel (TMM) to terminate. Note: Software versions which have reached End of Technical Support (EoTS) are not evaluated.
Source: NVD (National Vulnerability Database)
CVSS Information
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
Source: NVD (National Vulnerability Database)
Vulnerability Type
不可达退出条件的循环(无限循环)
Source: NVD (National Vulnerability Database)
Vulnerability Title
F5 BIG-IP 安全漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
F5 BIG-IP是美国F5公司的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-IP存在安全漏洞，该漏洞源于在UDP虚拟服务器上配置Allow Dynamic Record Sizing时，未公开的流量可能导致TMM终止。
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
II. Public POCs for CVE-2026-42920
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Same Patch Batch · F5 · 2026-05-13 · 51 CVEs total
| CVE-2026-41225 | 9.1 CRITICAL | iControl REST vulnerability |
| CVE-2026-41957 | 8.8 HIGH | BIG-IP and BIG-IQ Configuration utility vulnerability |
| CVE-2026-40061 | 8.7 HIGH | iControl REST and tmsh vulnerability |
| CVE-2026-42930 | 8.7 HIGH | Appliance mode iControl REST vulnerability |
| CVE-2026-32673 | 8.7 HIGH | BIG-IP scripted monitor vulnerability |
| CVE-2026-34176 | 8.7 HIGH | Knowledge Appliance mode iControl REST vulnerability |
| CVE-2026-42945 | 8.1 HIGH | NGINX ngx_http_rewrite_module vulnerability |
| CVE-2026-20916 | 8.1 HIGH | BIG-IQ iControl REST vulnerability |
| CVE-2026-41217 | 7.9 HIGH | BIG-IP tmsh vulnerability |
| CVE-2026-40629 | 7.5 HIGH | BIG-IP SSL/TLS vulnerability |
| CVE-2026-40067 | 7.5 HIGH | BIG-IP APM Vulnerability |
| CVE-2026-39455 | 7.5 HIGH | BIG-IP Configuration utility vulnerability |
| CVE-2026-39458 | 7.5 HIGH | BIG-IP DNS Cache vulnerability |
| CVE-2026-40423 | 7.5 HIGH | BIG-IP SIP profile vulnerability |
| CVE-2026-41218 | 7.5 HIGH | BIG-IP PEM iRules vulnerability |
| CVE-2026-40618 | 7.5 HIGH | BIG-IP SSL/TLS vulnerability |
| CVE-2026-41956 | 7.5 HIGH | BIG-IP TMM Vulnerability |
| CVE-2026-40060 | 7.5 HIGH | BIG-IP Advanced WAF and ASM vulnerability |
| CVE-2026-41227 | 7.5 HIGH | BIG-IP HTTP/2 Layer 7 Dos Protection vulnerability |
| CVE-2026-42409 | 7.5 HIGH | BIG-IP HTTP/2 vulnerability |
Showing top 20 of 51 CVEs. View all on vendor page → →
IV. Related Vulnerabilities
Same vendor: F5
Same weakness: CWE-835
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V. Comments for CVE-2026-42920
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