CVE-2024-21338
Microsoft Windows: Kernel Exposed IOCTL with Insufficient Access Control
As of , CVE-2024-21338 in Microsoft Windows is on CISA's list of exploited vulnerabilities: CISA listed it on . Our patch-first group: Patch this week.
- Exploited
- Yes: CISA listed it on 4 March 2024
- US federal deadline
- 25 March 202421 days after CISA listed it. US federal civilian agencies must fix it by then.
- Used in ransomware campaigns
- Known
- EPSS score
- 0.60Higher than 99% of the CVEs EPSS scores. EPSS estimates the chance of exploitation activity in the next 30 days.
- EPSS when listed
- 0.00 on 4 March 2024EPSS on the day CISA listed it.
- Public exploit
- 2 Exploit-DB entries
- Fix
- Vendor advice: msrc.microsoft.comLinks below, from CISA's entry.
What CISA says to do
Apply mitigations per vendor instructions or discontinue use of the product if mitigations are unavailable.
CISA's required action
What the flaw is
Microsoft Windows Kernel contains an exposed IOCTL with insufficient access control vulnerability within the IOCTL (input and output control) dispatcher in appid.sys that allows a local attacker to achieve privilege escalation.
CISA's description
Windows Kernel Elevation of Privilege Vulnerability
The CVE record's description, from microsoft
- CVE published
- 13 February 2024
- Assigned by
- microsoft
- CVSS
- 7.8 High (CVSS 3.1, from the CNA)
- CWE-822
- Untrusted Pointer Dereference
- CISA SSVC, exploitation
- active
- CISA SSVC, automatable
- no
- CISA SSVC, technical impact
- total
Timeline
- The CVE record was published.
- CISA added it to its list of exploited vulnerabilities.
- The US federal deadline to fix it.
- Exploit-DB published an exploit (EDB-ID 51946).
- Exploit-DB published an exploit (EDB-ID 52275).
Public exploits
Facts from Metasploit's module list and Exploit-DB's index; we never copy exploit code.
- Exploit-DB: Microsoft Windows 11 - Kernel Privilege EscalationEDB-ID 52275, 22 April 2025
- Exploit-DB: Microsoft Windows 10.0.17763.5458 - Kernel Privilege EscalationEDB-ID 51946, 2 April 2024
Windows: other exploited entries
| Vulnerability | Product | Our group | Listed | Deadline | EPSS |
|---|---|---|---|---|---|
| CVE-2025-60710Link Following | Microsoft Windows | Patch nowRansomware use, listed within a year | 0.05 | ||
| CVE-2008-4250Buffer Overflow | Microsoft Windows | Patch this weekMetasploit module; EPSS 0.99; verified Exploit-DB entry | 0.99 | ||
| CVE-2008-0015Video ActiveX Control Remote Code Execution | Microsoft Windows | Patch this weekMetasploit module; EPSS 0.77; verified Exploit-DB entry | 0.77 | ||
| CVE-2013-3918Out-of-Bounds Write | Microsoft Windows | Patch this weekMetasploit module; EPSS 0.74; verified Exploit-DB entry | 0.74 | ||
| CVE-2010-2568Remote Code Execution | Microsoft Windows | Patch this weekMetasploit module; EPSS 0.91; verified Exploit-DB entry | 0.91 | ||
| CVE-2015-0016TS WebProxy Directory Traversal | Microsoft Windows | Patch this weekMetasploit module; EPSS 0.76; verified Exploit-DB entry | 0.76 | ||
| CVE-2015-2426Adobe Type Manager Library Remote Code Execution | Microsoft Windows | Patch this weekMetasploit module; EPSS 0.87; verified Exploit-DB entry | 0.87 | ||
| CVE-2014-6332Object Linking & Embedding (OLE) Automation Array Remote Code Execution | Microsoft Windows | Patch this weekMetasploit module; EPSS 0.95; verified Exploit-DB entry | 0.95 | ||
| CVE-2017-0146SMB Remote Code Execution | Microsoft Windows | Patch this weekRansomware use; Metasploit module; EPSS 0.90; verified Exploit-DB entry | 0.90 | ||
| CVE-2014-4114Object Linking & Embedding (OLE) Remote Code Execution | Microsoft Windows | Patch this weekMetasploit module; EPSS 0.82; verified Exploit-DB entry | 0.82 |
Read further
- CVE recordcve.org
- NVD entrynvd.nist.gov
- CISA's catalogcisa.gov
- EPSS for this CVEapi.first.org