CVE-2023-21687
HTTP.sys Information Disclosure Vulnerability
5.5 Medium
HTTP.sys Information Disclosure Vulnerability
Attack profile
How easy it is to exploit
- Attack vector
- Local
- Complexity
- Low
- Privileges needed
- Low
- User interaction
- None
What an attacker can affect
- Confidentiality
- High
- Integrity
- None
- Availability
- None
Exploit likelihood
0.46%Down 0.4 points since Feb 15, 2023
What each source reports
CVE List Score used
HTTP.sys Information Disclosure Vulnerability
HTTP.sys Information Disclosure Vulnerability
- Record
CVE-2023-21687- CVSS 3.1
- 5.5 Medium
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N/E:U/RL:O/RC:C - Weakness
- CWE-125
- Updated
- 2026-11-02
EUVDEUVD-2023-25854
HTTP.sys Information Disclosure Vulnerability
- Record
EUVD-2023-25854- CVSS 3.1
- 5.5 Medium
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N/E:U/RL:O/RC:C - Updated
- 2026-11-02
GitHub AdvisoriesGHSA-mr4r-vfmp-v9q3
HTTP.sys Information Disclosure Vulnerability
HTTP.sys Information Disclosure Vulnerability
- Record
GHSA-mr4r-vfmp-v9q3- CVSS 3.1
- 5.5 Medium
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N - Weakness
- CWE-125, CWE-668
- Updated
- 2026-11-02
NVD
HTTP.sys Information Disclosure Vulnerability
- Record
CVE-2023-21687- CVSS 3.1
- 5.5 Medium
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N - Weakness
- CWE-125, CWE-668
- Updated
- 2026-11-02
Affected products
History
| Recorded | Changed | Sources |
|---|---|---|
| first indexed | CVE List, EUVD, GitHub Advisories, NVD |
Dates are when Every CVE recorded each change. Upstream dates may differ.
In short
CVE-2023-21687 is a medium vulnerability (CVSS 5.5) in Microsoft Windows 11 Version 21h2, published February 14, 2023. No source lists public exploit code. EPSS puts the chance of exploitation in the next 30 days at 0.46%, the 40th percentile. No source names a fixed version.