add CVE-2021-21551

README.md

@@ -189,7 +189,14 @@
 - **PoC**
   - [https://github.com/FunPhishing/CVE-2021-24096](https://github.com/FunPhishing/CVE-2021-24096) :  ![starts](https://img.shields.io/github/stars/FunPhishing/CVE-2021-24096.svg) ![forks](https://img.shields.io/github/forks/FunPhishing/CVE-2021-24096.svg)
 
+## CVE-2021-21551
 
+> Dell dbutil_2_3.sys driver contains an insufficient access control vulnerability which may lead to escalation of privileges, denial of service, or information disclosure. Local authenticated user access is required.
+
+- **Analyse**
+  - https://labs.sentinelone.com/cve-2021-21551-hundreds-of-millions-of-dell-computers-at-risk-due-to-multiple-bios-driver-privilege-escalation-flaws/
+- **Exp**
+  - [https://github.com/waldo-irc/CVE-2021-21551](https://github.com/waldo-irc/CVE-2021-21551) :  ![starts](https://img.shields.io/github/stars/waldo-irc/CVE-2021-21551.svg) ![forks](https://img.shields.io/github/forks/waldo-irc/CVE-2021-21551.svg)
 
 ## CVE-2021-1732
 
@@ -206,7 +213,6 @@
   - [https://github.com/KaLendsi/CVE-2021-1732-Exploit](https://github.com/KaLendsi/CVE-2021-1732-Exploit) :  ![starts](https://img.shields.io/github/stars/KaLendsi/CVE-2021-1732-Exploit.svg) ![forks](https://img.shields.io/github/forks/KaLendsi/CVE-2021-1732-Exploit.svg)
   - [https://github.com/Al1ex/WindowsElevation/tree/master/CVE-2021-1732](https://github.com/Al1ex/WindowsElevation/tree/master/CVE-2021-1732) :  ![starts](https://img.shields.io/github/stars/Al1ex/WindowsElevation.svg) ![forks](https://img.shields.io/github/forks/Al1ex/WindowsElevation.svg)
   - [https://github.com/k-k-k-k-k/CVE-2021-1732](https://github.com/k-k-k-k-k/CVE-2021-1732) :  ![starts](https://img.shields.io/github/stars/k-k-k-k-k/CVE-2021-1732.svg) ![forks](https://img.shields.io/github/forks/k-k-k-k-k/CVE-2021-1732.svg)
-  - [https://github.com/ltfafei/CVE-2021-1732_exp](https://github.com/ltfafei/CVE-2021-1732_exp) :  ![starts](https://img.shields.io/github/stars/ltfafei/CVE-2021-1732_exp.svg) ![forks](https://img.shields.io/github/forks/ltfafei/CVE-2021-1732_exp.svg)
   - [https://github.com/jessica0f0116/cve_2021_1732](https://github.com/jessica0f0116/cve_2021_1732) :  ![starts](https://img.shields.io/github/stars/jessica0f0116/cve_2021_1732.svg) ![forks](https://img.shields.io/github/forks/jessica0f0116/cve_2021_1732.svg)
   - [https://github.com/oneoy/CVE-2021-1732-Exploit](https://github.com/oneoy/CVE-2021-1732-Exploit) :  ![starts](https://img.shields.io/github/stars/oneoy/CVE-2021-1732-Exploit.svg) ![forks](https://img.shields.io/github/forks/oneoy/CVE-2021-1732-Exploit.svg)