Vulnerability record · CVE-2016-6504 · published 6 August 2016

CVE-2016-6504: Wireshark null pointer dereference vulnerability

Wireshark · Wireshark

epan/dissectors/packet-ncp2222.inc in the NDS dissector in Wireshark 1.12.x before 1.12.13 does not properly maintain a ptvc data structure, which allows remote attackers to cause a denial of service (NULL pointer dereference and application crash) via a crafted packet.

5.9 CVSS 3.0 Medium EPSS 6.6% · top 6.4% CWE-476 · NULL pointer dereference

5.9CVSS 3.0 base score, v2 4.3

6.6%EPSS exploitation probability, 30 days

NoNot in CISA KEV

1Affected product versions listed by NVD

16References

17 Jun 2026Last modified by NVD

Description

CVSS:3.0/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:H

Affected products

1 vulnerable configurations from NVD's CPE data, grouped by vendor and product.

Wireshark Wireshark

References

Link	Tags
http://openwall.com/lists/oss-security/2016/07/28/3	Mailing List
http://www.debian.org/security/2016/dsa-3648
http://www.securityfocus.com/bid/92164
http://www.securitytracker.com/id/1036480
http://www.wireshark.org/security/wnpa-sec-2016-40.html	Vendor Advisory
https://bugs.wireshark.org/bugzilla/show_bug.cgi?id=12576	Issue Tracking
https://code.wireshark.org/review/gitweb?p=wireshark.git%3Ba=commit%3Bh=9eacbb4d48df647648127b9258f9e5aeeb0c7d99
https://www.exploit-db.com/exploits/40194/
http://openwall.com/lists/oss-security/2016/07/28/3	Mailing List
http://www.debian.org/security/2016/dsa-3648
http://www.securityfocus.com/bid/92164
http://www.securitytracker.com/id/1036480
http://www.wireshark.org/security/wnpa-sec-2016-40.html	Vendor Advisory
https://bugs.wireshark.org/bugzilla/show_bug.cgi?id=12576	Issue Tracking
https://code.wireshark.org/review/gitweb?p=wireshark.git%3Ba=commit%3Bh=9eacbb4d48df647648127b9258f9e5aeeb0c7d99
https://www.exploit-db.com/exploits/40194/

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Related vulnerabilities

Same products first, then exploited flaws of the same weakness class.

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Source: NIST National Vulnerability Database (record CVE-2016-6504), CISA KEV, FIRST EPSS (scores of 2026-09-29). This page is refreshed as NVD updates the record.