Is CVE-2026-15164 exploited in the wild?

No. Junglewise Threat Intelligence has no report of CVE-2026-15164 being exploited in the wild.

How severe is CVE-2026-15164?

Medium severity, with a CVSS score of 5.5, published 8 July 2026.

Which products and versions are affected?

Wireshark Foundation Ciscodump 4.6.0 to 4.6.6, 4.4.0 to 4.4.16.

Is there a fix for CVE-2026-15164?

No fixed version is recorded yet. Check the vendor's advisory in the references below. If you run it, Junglewise drafts a mitigation that fits your setup and applies it once you approve, with senior security engineers behind it.

How is CVE-2026-15164 attacked?

It is attacked over the network, in a software library.

Am I affected by CVE-2026-15164?

Check whether you run Wireshark Foundation Ciscodump at an affected version. Junglewise does that check for you around the clock: connect your code, cloud and domains, and it matches new vulnerabilities like this one against what you actually run and tells you when one reaches you.

CVE-2026-15164: Wireshark ciscodump heap buffer overflow in hex-dump parsers

CVE-2026-15164 · Severity: medium · CVSS 5.5 · Published 2026-07-08

A vulnerability exists in ciscodump, a tool included with Wireshark used to capture network traffic from Cisco devices. If a user connects the tool to a malicious or compromised Cisco device, the device can send specially crafted data that causes the tool to crash. This results in a denial of service, preventing the user from successfully capturing or analyzing network traffic from that source.

Vendors: Wireshark Foundation.

Quick answers

Is CVE-2026-15164 exploited in the wild?: No. Junglewise Threat Intelligence has no report of CVE-2026-15164 being exploited in the wild.
How severe is CVE-2026-15164?: Medium severity, with a CVSS score of 5.5, published 8 July 2026.
Which products and versions are affected?: Wireshark Foundation Ciscodump 4.6.0 to 4.6.6, 4.4.0 to 4.4.16.
Is there a fix for CVE-2026-15164?: No fixed version is recorded yet. Check the vendor's advisory in the references below. If you run it, Junglewise drafts a mitigation that fits your setup and applies it once you approve, with senior security engineers behind it.
How is CVE-2026-15164 attacked?: It is attacked over the network, in a software library.
Am I affected by CVE-2026-15164?: Check whether you run Wireshark Foundation Ciscodump at an affected version. Junglewise does that check for you around the clock: connect your code, cloud and domains, and it matches new vulnerabilities like this one against what you actually run and tells you when one reaches you.

Technical details

A heap-based buffer overflow (CWE-122) exists in the ciscodump extcap capture tool's remote hex-dump parsers. The tool allocates a fixed 65,535-byte heap buffer (PACKET_MAX_SIZE) but fails to perform bounds checking when appending decoded hex groups via memcpy in the parse_line_ios, parse_line_ios_xe_16, parse_line_ios_xe_17, and parse_line_asa functions. An attacker controlling a remote Cisco device or performing a Man-in-the-Middle attack on the SSH session can stream more than 65,535 bytes of hex data for a single packet, leading to an out-of-bounds write. This results in a crash (DoS) and potentially arbitrary code execution. The issue is addressed in versions 4.6.7 and 4.4.17.

Affected products

Wireshark Foundation ciscodump 4.6.0 to 4.6.6, 4.4.0 to 4.4.16

Timeline

2026-06-22: other: Vulnerability verified on master branch
2026-07-08: disclosed: Initial disclosure date
2026-07-08: advisory: NVD publication date

References

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