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CVE-2026-3203— Buffer Over-read 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是导线鲨鱼（Wireshark）团队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 4.6.0版本至4.6.3版本和4.4.0版本至4.4.13版本存在安全漏洞，该漏洞源于RF4CE Profile协议解析器崩溃，可能导致拒绝服务。

CVSS 5.5 · Medium EPSS 0.26% · P17

Possible ATT&CK Techniques 1 AI

T1499 · Endpoint Denial of Service

Affected Version Matrix 2

VendorProduct Version RangeStatus
Wireshark Foundation Wireshark 4.6.0< 4.6.4 affected
4.4.0< 4.4.14 affected
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I. Basic Information for CVE-2026-3203

Vulnerability Information
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Vulnerability Title
Buffer Over-read in Wireshark
Source: CVE Program / CVE List V5
Vulnerability Description
RF4CE Profile protocol dissector crash in Wireshark 4.6.0 to 4.6.3 and 4.4.0 to 4.4.13 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
缓冲区上溢读取
Source: CVE Program / CVE List V5
Vulnerability Title
Wireshark 安全漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
Wireshark是导线鲨鱼（Wireshark）团队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 4.6.0版本至4.6.3版本和4.4.0版本至4.4.13版本存在安全漏洞，该漏洞源于RF4CE Profile协议解析器崩溃，可能导致拒绝服务。
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 ~ 4.6.4 -

II. Public POCs for CVE-2026-3203

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III. Intelligence Information for CVE-2026-3203

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Vendor Advisories for CVE-2026-3203 (1)

Same Patch Batch · Wireshark Foundation · 2026-02-25 · 3 CVEs total

CVE-2026-3202 4.7 MEDIUM NULL Pointer Dereference in Wireshark
CVE-2026-3201 4.7 MEDIUM Improperly Controlled Sequential Memory Allocation in Wireshark

IV. Related Vulnerabilities

Same product: Wireshark
Same vendor: Wireshark Foundation
Same weakness: CWE-126

V. Comments for CVE-2026-3203

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