# CVE-2026-60109

## Summary

- **CVE ID:** CVE-2026-60109
- **Severity:** HIGH
- **CVSS Score:** 8.7 (CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N)
- **CWE:** CWE-476
- **Published:** Jul 9, 2026
- **Last Modified:** Jul 14, 2026

## Description

Zeek before 8.0.9 contains a null pointer dereference vulnerability in its Kerberos protocol analyzer that allows unauthenticated remote attackers to crash the sensor by sending a crafted KRB_ERROR message with error-code 25 (KDC_ERR_PREAUTH_REQUIRED) containing a PA-DATA element with padata-type 2, 3, 11, or 19. Attackers can exploit a parser and analyzer state mismatch where proc_padata() dereferences an uninitialized pa_data_element field selected by the wrong parsing arm, triggering a crash via a single UDP or TCP packet to port 88 without any credentials or prior authentication.

## Affected Products

- zeek — zeek (0)

## References

- [CNA](https://github.com/zeek/zeek/releases/tag/v8.0.9)
- [CNA](https://github.com/zeek/zeek/commit/c82e3c734893d932e94310aec0dbeb1ffcea169d)
- [CNA](https://www.vulncheck.com/advisories/zeek-null-pointer-dereference-dos-via-kerberos-krb-error-parsing)

## Exploitation Prediction (EPSS)

- **EPSS Score:** 0.92%
- **EPSS Percentile:** 58.7

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_Exported from OnDuty AI Vulnerability Intelligence on 2026-09-18._