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CVE-2026-15171— NULL Pointer Dereference in Wireshark

Quick assessment

Affected
Wireshark Foundation Wireshark
Exploitation
No confirmed in-the-wild exploitation; assess based on exposure
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.

Wireshark是Wireshark组织开源的一套网络数据包分析软件。该软件的功能是截取网络数据包,并显示出详细的数据以供分析。 Wireshark存在异常处理不当漏洞，该漏洞源于SSH协议解析器空指针取消引用，可能导致拒绝服务。以下版本受到影响：4.6.0至4.6.6版本和4.4.0至4.4.16版本。

CVSS 5.5 · Medium EPSS 0.12% · P2

Possible ATT&CK Techniques 1 AI

T1499 · Endpoint Denial of Service

Affected Version Matrix 2

VendorProduct Version RangeStatus
Wireshark Foundation Wireshark 4.6.0< 4.6.7 affected
4.4.0< 4.4.17 affected
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I. Basic Information for CVE-2026-15171

Vulnerability Information
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Vulnerability Title
NULL Pointer Dereference in Wireshark
Source: CVE Program / CVE List V5
Vulnerability Description
SSH protocol dissector crash in Wireshark 4.6.0 to 4.6.6 and 4.4.0 to 4.4.16 allows denial of service
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H
Source: CVE Program / CVE List V5
Vulnerability Type
空指针解引用
Source: CVE Program / CVE List V5
Vulnerability Title
Wireshark 异常处理不当漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
Wireshark是Wireshark组织开源的一套网络数据包分析软件。该软件的功能是截取网络数据包,并显示出详细的数据以供分析。 Wireshark存在异常处理不当漏洞，该漏洞源于SSH协议解析器空指针取消引用，可能导致拒绝服务。以下版本受到影响：4.6.0至4.6.6版本和4.4.0至4.4.16版本。
Source: CNNVD (China National Vulnerability Database)
CVSS Information
N/A
Source: CNNVD (China National Vulnerability Database)
Vulnerability Type
N/A
Source: CNNVD (China National Vulnerability Database)

Affected Products

Vendor Product Affected Versions CPE Subscribe
Wireshark Foundation Wireshark 4.6.0 ~ 4.6.7 -

II. Public POCs for CVE-2026-15171

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III. Intelligence Information for CVE-2026-15171

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Vendor Advisories for CVE-2026-15171 (1)

Proof of Concept for CVE-2026-15171 (1)

Same Patch Batch · Wireshark Foundation · 2026-07-08 · 12 CVEs total

CVE-2026-15167 7.5 HIGH Stack-based Buffer Overflow in Wireshark
CVE-2026-15172 5.5 MEDIUM Unchecked Input for Loop Condition in Wireshark
CVE-2026-15166 5.5 MEDIUM Stack-based Buffer Overflow in Wireshark
CVE-2026-15174 5.5 MEDIUM Heap-based Buffer Overflow in Wireshark
CVE-2026-15163 5.5 MEDIUM Loop with Unreachable Exit Condition ('Infinite Loop') in Wireshark
CVE-2026-15164 5.5 MEDIUM Heap-based Buffer Overflow in ciscodump
CVE-2026-15169 5.5 MEDIUM Heap-based Buffer Overflow in Wireshark
CVE-2026-15165 5.5 MEDIUM Heap-based Buffer Overflow in Wireshark
CVE-2026-15170 5.5 MEDIUM Heap-based Buffer Overflow in Wireshark
CVE-2026-15173 4.7 MEDIUM Heap-based Buffer Overflow in Wireshark
CVE-2026-15168 2.5 LOW Use of Uninitialized Variable in Wireshark

IV. Related Vulnerabilities

Same product: Wireshark
Same vendor: Wireshark Foundation
Same weakness: CWE-476

V. Comments for CVE-2026-15171

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