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CVE-2026-76927— NULL Pointer Dereference in Wireshark

CVSS 4.7 · Medium EPSS 0.10% · P1

Possible ATT&CK Techniques 1AI

T1499 · Endpoint Denial of Service

Affected Version Matrix 2

VendorProductVersion RangeStatus
Wireshark FoundationWireshark4.6.0< 4.6.8affected
4.4.0< 4.4.18affected
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I. Basic Information for CVE-2026-76927

Vulnerability Information
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Vulnerability Title
NULL Pointer Dereference in Wireshark
Source: CVE Program / CVE List V5
Vulnerability Description
H.245 protocol dissector crash in 4.6.0 to 4.6.7 and 4.4.0 to 4.4.18 allows denial of service
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:L/AC:H/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组织开源的一款网络协议分析工具。 Wireshark 4.6.0版本至4.6.7版本和4.4.0版本至4.4.18版本存在异常处理不当漏洞，该漏洞源于H.245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

VendorProductAffected VersionsCPESubscribe
Wireshark FoundationWireshark 4.6.0 ~ 4.6.8 -

II. Public POCs for CVE-2026-76927

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III. Intelligence Information for CVE-2026-76927

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Patches & Fixes for CVE-2026-76927 (1)

Vendor Advisories for CVE-2026-76927 (1)

Same Patch Batch · Wireshark Foundation · 2026-08-19 · 25 CVEs total

CVE-2026-768868.1 HIGHHeap-based Buffer Overflow in Wireshark
CVE-2026-769287.5 HIGHNULL Pointer Dereference in Wireshark
CVE-2026-768797.5 HIGHStack-based Buffer Overflow in Wireshark
CVE-2026-768807.5 HIGHOut-of-bounds Write in Wireshark
CVE-2026-769245.5 MEDIUMOut-of-bounds Read in Wireshark
CVE-2026-769225.5 MEDIUMNULL Pointer Dereference in Wireshark
CVE-2026-769185.5 MEDIUMHeap-based Buffer Overflow in Wireshark
CVE-2026-769175.5 MEDIUMHeap-based Buffer Overflow in Wireshark
CVE-2026-769235.5 MEDIUMOut-of-bounds Read in Wireshark
CVE-2026-769215.5 MEDIUMUse After Free in Wireshark
CVE-2026-769195.3 MEDIUMUse of Uninitialized Variable in Wireshark
CVE-2026-769204.7 MEDIUMOut-of-bounds Write in Wireshark
CVE-2026-769294.7 MEDIUMOut-of-bounds Read in Wireshark
CVE-2026-768824.7 MEDIUMOut-of-bounds Read in Wireshark
CVE-2026-768834.7 MEDIUMHeap-based Buffer Overflow in Wireshark
CVE-2026-768894.7 MEDIUMHeap-based Buffer Overflow in Wireshark
CVE-2026-768814.7 MEDIUMNULL Pointer Dereference in Wireshark
CVE-2026-768883.1 LOWHeap-based Buffer Overflow in Wireshark
CVE-2026-768913.1 LOWExpired Pointer Dereference in Wireshark
CVE-2026-768853.1 LOWBuffer Over-read in Wireshark

Showing top 20 of 25 CVEs. View all on vendor page &rarr; →

IV. Related Vulnerabilities

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

V. Comments for CVE-2026-76927

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