CVE-2026-60109Public exploitNetwork attack vector

Sensor crash via Kerberos analyzer state mismatch

Published Jul 9, 2026 · Updated Jul 9, 2026

Null pointer dereference in the Kerberos analyzer in Zeek before 8.0.9 allows remote attackers to crash the sensor via crafted KRB_ERROR traffic. proc_padata() treats PA-DATA inside an error message as normal typed data and dereferences the absent pa_data_element selected by that parsing arm. A single UDP or TCP packet to port 88 reaches the flaw without credentials, interrupting network monitoring when the Zeek process crashes.

CVSS severity8.7
High
EPSS probability0.92%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Null pointer dereference in the Kerberos analyzer in Zeek before 8.0.9 allows remote attackers to crash the sensor via crafted KRB_ERROR traffic. proc_padata() treats PA-DATA inside an error message as normal typed data and dereferences the absent pa_data_element selected by that parsing arm. A single UDP or TCP packet to port 88 reaches the flaw without credentials, interrupting network monitoring when the Zeek process crashes.

The record

CVE
CVE-2026-60109
Published
Jul 9, 2026
Updated
Jul 9, 2026
Vendor
Zeek Project
Product
Zeek
Classifications
CWE-476, T1499.004
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Jul 9, 2026CVE publishedPublication date reported by the CVE source.
  2. Jul 9, 2026Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

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Is a vulnerable build present?

Compare these published version ranges with your installed build and any vendor patches.

  1. Affected versionversion=0 <8.0.9

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

Zeek Project · Zeekversion=0 <8.0.9

Published CVSS scores

8.7VulnCheckCVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N
7.5VulnCheckCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.

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No observations available

Sep 9, 2026Sep 15, 2026
Latest reporting daySep 15, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitPublished

Weakness, pattern, technique

CWE-476NULL Pointer Dereference
T1499.004Application or System Exploitation

Public exploit references

Labels summarize the accepted research assessment. They do not indicate a test against your environment.

Technologies

Your stack

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Your stack

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