CVE-2026-6537Public exploit

Crash via unchecked ZigBee decryption length

Published Apr 30, 2026 · Updated Apr 30, 2026

Stack-based buffer overflow in Wireshark 4.4.0 through 4.4.14 and 4.6.0 through 4.6.4 allows attackers to crash the analyzer. The ZigBee Direct decrypt_data() path passes an attacker-controlled length to zbee_sec_ccm_decrypt(), which writes decrypted bytes into a fixed 264-byte stack buffer before CCM authentication. Opening a crafted capture requires user interaction, while injection of a malformed packet onto a monitored link can interrupt the analyzing Wireshark process.

CVSS severity5.5
Medium
EPSS probability0.18%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
Coverage for this vulnerability

See if you're affected

Explore vulnerability checks for your environment with Hinoki.

Book a demo

Summary

What happened

Stack-based buffer overflow in Wireshark 4.4.0 through 4.4.14 and 4.6.0 through 4.6.4 allows attackers to crash the analyzer. The ZigBee Direct decrypt_data() path passes an attacker-controlled length to zbee_sec_ccm_decrypt(), which writes decrypted bytes into a fixed 264-byte stack buffer before CCM authentication. Opening a crafted capture requires user interaction, while injection of a malformed packet onto a monitored link can interrupt the analyzing Wireshark process.

The record

CVE
CVE-2026-6537
Published
Apr 30, 2026
Updated
Apr 30, 2026
Vendor
Wireshark Foundation
Product
Wireshark
Classifications
CWE-121, T1203
Attack vector
local
Privileges
unauthenticated

Timeline

How it unfolded

  1. Apr 30, 2026CVE publishedPublication date reported by the CVE source.
  2. Apr 30, 2026Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

Compare your product and version with the public record. A matching version still requires validation against your environment.

Is a vulnerable build present?

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

  1. Affected versionversion=4.4.0 <4.4.15
  2. Affected versionversion=4.6.0 <4.6.5

What conditions does exploitation require?

Attack vectorlocal
Required privilegesunauthenticated

What is affected?

Wireshark Foundation · Wiresharkversion=4.4.0 <4.4.15; version=4.6.0 <4.6.5

Published CVSS scores

5.5GitLab Inc.CVSS:3.1/AV:L/AC:L/PR:N/UI:R/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.

Daily unique IPsNo honeypot observations are available for this CVE in the selected window.

No observations available

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

Weakness, pattern, technique

CWE-121Stack-based Buffer Overflow
T1203Exploitation for Client Execution

Public exploit references

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

Technologies

Your stack

See the directory against your own environment.

Your stack

Check the software in your environment

Book a demo to see how Hinoki identifies affected software and validates exploitability in your environment.

Book a demo