CVE-2023-34367

Name: CVE-2023-34367
Creator: NVD / NIST
Published: 2023-06-14T20:15:09.51+00:00
License: https://creativecommons.org/publicdomain/zero/1.0/

MEDIUMCVSS 6.5/10EPSS 1.23%

Last modified Jun 17, 2026

CVE-2023-34367 is a medium-severity vulnerability rated 6.5/10 on the CVSS scale. Windows 7 is vulnerable to a full blind TCP/IP hijacking attack. The vulnerability exists in Windows 7 (any Windows until Windows 8) and in any implementation of TCP/IP, which is vulnerable to the Idle scan attack (including many IoT devices). EPSS estimates a 1.23% chance of exploitation in the next 30 days.

Description

Windows 7 is vulnerable to a full blind TCP/IP hijacking attack. The vulnerability exists in Windows 7 (any Windows until Windows 8) and in any implementation of TCP/IP, which is vulnerable to the Idle scan attack (including many IoT devices). NOTE: The vendor considers this a low severity issue.

Metrics

CVSS 3.1

6.5/10

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:N

EPSS Probability

1.23%

65.2th percentile

Probability of exploitation in the next 30 days. Learn more

Weakness Enumeration

CWE-287

Affected Software

Vendor	Product	Versions
Microsoft	Windows 7	All versions

References

http://blog.pi3.com.pl/?p=850Exploit, Technical Description, Third Party Advisory
https://portswigger.net/daily-swig/blind-tcp-ip-hijacking-is-resurrected-for-windows-7Exploit, Technical Description
https://pwnies.com/windows-7-blind-tcp-ip-hijacking/Third Party Advisory
http://blog.pi3.com.pl/?p=850Exploit, Technical Description, Third Party Advisory
https://portswigger.net/daily-swig/blind-tcp-ip-hijacking-is-resurrected-for-windows-7Exploit, Technical Description
https://pwnies.com/windows-7-blind-tcp-ip-hijacking/Third Party Advisory

Timeline

Published: Jun 14, 2023
Last Modified: Jun 17, 2026
Status: Modified

Frequently Asked Questions

What is CVE-2023-34367?

How severe is CVE-2023-34367?

CVE-2023-34367 has a CVSS score of 6.5/10 (MEDIUM severity). The EPSS model estimates a 1.23% probability of exploitation in the next 30 days.

How do I fix CVE-2023-34367?

Check the vendor references and advisories linked above for patched versions and mitigation guidance. You can also run a Strix scan to test if your systems are affected.

Are you affected by CVE-2023-34367?

Run a free Strix scan to check your systems for this vulnerability.

Scan your code now

Source: NVD / NIST