CVE-2021-41732

7.5 highEPSS 0.9%

High (7.5) in zeek zeek. EPSS 0.9% chance of exploitation in the next 30 days.

An issue was discovered in zeek version 4.1.0. There is a HTTP request splitting vulnerability that will invalidate any ZEEK HTTP based security analysis. NOTE: the vendor's position is that the observed behavior is intended

Severity

CVSS 3.1

7.5 high

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

EPSS: 0.9% chance of exploitation in the next 30 days; higher than 59% of CVEs (scores of 2026-10-31)
CWE: CWE-444
Published: 2021-09-29
Modified: 2026-06-17
Record from: the NVD, synced 2026-10-19

Affected

zeek:zeek

References

https://github.com/zeek/zeek/issues/1798
https://github.com/zeek/zeek/issues/1798

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