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Wireshark ciscodump CVE-2026-15164

| EUVDEUVD-2026-42410 MEDIUM
Heap-based Buffer Overflow (CWE-122)
2026-07-08 cve@gitlab.com GHSA-w5mx-46xm-8f3v
Heap Overflow Denial Of Service Buffer Overflow Wireshark Red Hat Suse
5.5
CVSS 3.1 · NVD
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Severity by source

NVD PRIMARY
5.5 MEDIUM
AV:L/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H
vuln.today AI
4.3 MEDIUM

Crafted remote capture data (AV:N) but an analyst must launch ciscodump against the source (UI:R); only the tool process crashes, so C/I:N and A:L, matching SSVC's 'partial' technical impact.

3.1 AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:L
4.0 AV:N/AC:L/AT:N/PR:N/UI:P/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N
SUSE
MEDIUM
qualitative
Red Hat
5.5 MEDIUM
qualitative

Primary rating from NVD.

CVSS VectorNVD

Attack Vector
Local
Attack Complexity
Low
Privileges Required
None
User Interaction
Required
Scope
Unchanged
Confidentiality
None
Integrity
None
Availability
High

Lifecycle Timeline

10
Severity Changed
Jul 10, 2026 - 13:52 NVD
HIGH MEDIUM
CVSS changed
Jul 10, 2026 - 13:52 NVD
7.5 (HIGH) 5.5 (MEDIUM)
Analysis Updated
Jul 09, 2026 - 20:16 vuln.today
v3 (cvss_changed)
Analysis Updated
Jul 09, 2026 - 20:16 vuln.today
v2 (cvss_changed)
Re-analysis Queued
Jul 09, 2026 - 20:07 vuln.today
cvss_changed
Severity Changed
Jul 09, 2026 - 20:07 NVD
MEDIUM HIGH
CVSS changed
Jul 09, 2026 - 20:07 NVD
5.5 (MEDIUM) 7.5 (HIGH)
Analysis Generated
Jul 08, 2026 - 22:10 vuln.today
Patch available
Jul 08, 2026 - 22:04 EUVD
CVE Published
Jul 08, 2026 - 21:16 cve.org
MEDIUM 5.5

DescriptionNVD

Crash in ciscodump 4.6.0 to 4.6.6 and 4.4.0 to 4.4.16 allows denial of service

AnalysisAI

Denial of service in Wireshark's ciscodump remote capture utility (extcap) affects versions 4.6.0 through 4.6.6 and 4.4.0 through 4.4.16, where a heap-based buffer overflow (CWE-122) can crash the capture tool. An attacker able to feed crafted data to a running ciscodump session can terminate the process, disrupting live packet capture. A POC is referenced by CISA's SSVC assessment (no public exploit code independently identified), it is not in CISA KEV, and EPSS is very low at 0.10% (1st percentile), indicating minimal likelihood of widespread exploitation.

Technical ContextAI

ciscodump is an 'extcap' external capture interface shipped with Wireshark that connects to Cisco network devices (typically over SSH) to pull remote packet captures into Wireshark/tshark. The vulnerability is a CWE-122 heap-based buffer overflow, meaning ciscodump writes past the bounds of a heap-allocated buffer while parsing capture data or device responses, corrupting heap memory and crashing the process. The affected component is confirmed as Wireshark per the CPE data (cpe:2.3:a:wireshark:wireshark), and the tags (Buffer Overflow, Heap Overflow, Denial Of Service) reinforce that the root cause is memory-safety mishandling in the ciscodump data-processing path rather than a logic flaw.

RemediationAI

Vendor-released patch: upgrade Wireshark to 4.6.7 or 4.4.17 (or later), which contain the fix for the ciscodump heap overflow, per Wireshark advisory wnpa-sec-2026-63 (https://www.wireshark.org/security/wnpa-sec-2026-63.html). Because the flaw is isolated to the ciscodump extcap, an effective compensating control until patching is to avoid using ciscodump for remote captures and/or remove or restrict execution of the ciscodump extcap binary from the Wireshark extcap directory - the trade-off is loss of remote Cisco capture capability, which is acceptable in most environments since it is a niche feature. Additionally, only run ciscodump against trusted Cisco devices and networks, since untrusted or attacker-controlled capture sources are the exposure path.

More in Wireshark

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9.3 Mar 11

Buffer overflow in the mpeg_read function in wiretap/mpeg.c in the MPEG parser in Wireshark 1.8.x before 1.8.13 and 1.10
CVE-2013-4074 MEDIUM POC
5.0 Jun 09

The dissect_capwap_data function in epan/dissectors/packet-capwap.c in the CAPWAP dissector in Wireshark 1.6.x before 1.
CVE-2018-6836 CRITICAL POC
9.8 Feb 08

The netmonrec_comment_destroy function in wiretap/netmon.c in Wireshark through 2.4.4 performs a free operation on an un
CVE-2014-4174 CRITICAL POC
9.3 Jun 18

wiretap/libpcap.c in the libpcap file parser in Wireshark 1.10.x before 1.10.4 allows remote attackers to execute arbitr
CVE-2017-9353 HIGH POC
7.5 Jun 02

In Wireshark 2.2.0 to 2.2.6, the IPv6 dissector could crash. Rated high severity (CVSS 7.5), this vulnerability is remot
CVE-2017-17085 HIGH POC
7.5 Dec 01

In Wireshark 2.4.0 to 2.4.2 and 2.2.0 to 2.2.10, the CIP Safety dissector could crash. Rated high severity (CVSS 7.5), t
CVE-2017-9347 HIGH POC
7.5 Jun 02

In Wireshark 2.2.0 to 2.2.6, the ROS dissector could crash with a NULL pointer dereference. Rated high severity (CVSS 7.
CVE-2025-5601 HIGH POC
7.8 Jun 04

A denial of service vulnerability in Column handling crashes in Wireshark 4.4.0 to 4.4.6 and 4.2.0 to 4.2.12 (CVSS 7.8)

CVE-2023-4513 HIGH POC
7.5 Aug 24

BT SDP dissector memory leak in Wireshark 4.0.0 to 4.0.7 and 3.6.0 to 3.6.15 allows denial of service via packet injecti
CVE-2023-4512 HIGH POC
7.5 Aug 24

CBOR dissector crash in Wireshark 4.0.0 to 4.0.6 allows denial of service via packet injection or crafted capture file.

CVE-2023-2879 HIGH POC
7.5 May 26

GDSDB infinite loop in Wireshark 4.0.0 to 4.0.5 and 3.6.0 to 3.6.13 allows denial of service via packet injection or cra
CVE-2023-1992 HIGH POC
7.5 Apr 12

RPCoRDMA dissector crash in Wireshark 4.0.0 to 4.0.4 and 3.6.0 to 3.6.12 allows denial of service via packet injection o

Same weakness CWE-122 – Heap-based Buffer Overflow

View all
CVE-2023-4911 HIGH POC
7.8
CVE-2023-27997 CRITICAL
9.8
CVE-2025-24985 HIGH POC
7.8
CVE-2026-53362 HIGH POC
7.8
CVE-2025-21418 HIGH
7.8
CVE-2023-23376 HIGH
7.8
CVE-2025-24993 HIGH
7.8
CVE-2024-30085 HIGH POC
7.8

Same technique Heap Overflow

View all
CVE-2023-4911 HIGH POC
7.8
CVE-2023-27997 CRITICAL
9.8
CVE-2025-5419 HIGH POC
8.8
CVE-2026-53362 HIGH POC
7.8
CVE-2025-21418 HIGH
7.8
CVE-2023-23376 HIGH
7.8
CVE-2024-30085 HIGH POC
7.8
CVE-2023-6246 HIGH POC
8.4

Vendor StatusVendor

SUSE

Severity: Moderate
Product Status
SUSE Linux Enterprise Desktop 15 SP7 Affected
SUSE Linux Enterprise High Performance Computing 15 SP7 Affected
SUSE Linux Enterprise Module for Basesystem 15 SP7 Affected
SUSE Linux Enterprise Module for Desktop Applications 15 SP7 Affected
SUSE Linux Enterprise Server 15 SP7 Affected

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CVE-2026-15164 vulnerability details – vuln.today
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