CVE-2026-76880: CWE-787: Out-of-bounds Write in Wireshark Foundation Wireshark
An out-of-bounds write vulnerability exists in the RRC protocol dissector of Wireshark versions 4.6.0 to 4.6.7 and 4.4.0 to 4.4.18. This flaw can cause the application to crash, resulting in a denial of service condition.
AI Analysis
Technical Summary
CVE-2026-76880 is a high-severity vulnerability classified as CWE-787 (Out-of-bounds Write) affecting the Wireshark network protocol analyzer. Specifically, the RRC protocol dissector in Wireshark versions 4.6.0 through 4.6.7 and 4.4.0 through 4.4.18 contains a flaw that allows crafted input to cause a crash, leading to denial of service. The vulnerability does not impact confidentiality or integrity but affects availability by crashing the application. No official patch or remediation level has been provided in the available data, and no known exploits are reported in the wild.
Potential Impact
Successful exploitation causes a denial of service by crashing Wireshark when processing maliciously crafted RRC protocol data. There is no indication of confidentiality or integrity compromise. The impact is limited to availability disruption of the affected Wireshark instances.
Mitigation Recommendations
Patch status is not yet confirmed — check the vendor advisory for current remediation guidance. Until an official fix is released, users should avoid processing untrusted RRC protocol data with affected versions of Wireshark. Monitor the Wireshark Foundation's advisories for updates and apply patches promptly once available.
CVE-2026-76880: CWE-787: Out-of-bounds Write in Wireshark Foundation Wireshark
Description
An out-of-bounds write vulnerability exists in the RRC protocol dissector of Wireshark versions 4.6.0 to 4.6.7 and 4.4.0 to 4.4.18. This flaw can cause the application to crash, resulting in a denial of service condition.
CVSS v3.1
Score 7.5high
Affected software
pkg:github/wireshark/wiresharkRun on your own infrastructure? Check whether these packages are installed with threat-finder — our free open-source scanner.
Weaknesses
AI-Powered Analysis
Machine-generated threat intelligence
Technical Analysis
CVE-2026-76880 is a high-severity vulnerability classified as CWE-787 (Out-of-bounds Write) affecting the Wireshark network protocol analyzer. Specifically, the RRC protocol dissector in Wireshark versions 4.6.0 through 4.6.7 and 4.4.0 through 4.4.18 contains a flaw that allows crafted input to cause a crash, leading to denial of service. The vulnerability does not impact confidentiality or integrity but affects availability by crashing the application. No official patch or remediation level has been provided in the available data, and no known exploits are reported in the wild.
Potential Impact
Successful exploitation causes a denial of service by crashing Wireshark when processing maliciously crafted RRC protocol data. There is no indication of confidentiality or integrity compromise. The impact is limited to availability disruption of the affected Wireshark instances.
Mitigation Recommendations
Patch status is not yet confirmed — check the vendor advisory for current remediation guidance. Until an official fix is released, users should avoid processing untrusted RRC protocol data with affected versions of Wireshark. Monitor the Wireshark Foundation's advisories for updates and apply patches promptly once available.
Technical Details
- Data Version
- 5.2
- Assigner Short Name
- GitLab
- Date Reserved
- 2026-08-19T22:34:04.934Z
- Cvss Version
- 3.1
- State
- PUBLISHED
- Remediation Level
- null
Threat ID: 6a8633c5acd9273b49b8ad02
Added to database: 08/19/2026, 22:52:53 UTC
Last enriched: 08/19/2026, 23:07:08 UTC
Last updated: 08/20/2026, 02:38:08 UTC
Views: 6
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