CVE-2026-56645: CWE-122: Heap-based Buffer Overflow in Microsoft Microsoft Edge (Chromium-based)
Heap-based buffer overflow in Microsoft Edge (Chromium-based) allows an unauthorized attacker to execute code over a network.
AI Analysis
Technical Summary
This vulnerability (CWE-122) in Microsoft Edge (Chromium-based) involves a heap-based buffer overflow that could be exploited by an attacker to execute arbitrary code remotely without privileges. The affected version is 1.0.0.0. Microsoft has published an official fix to address this issue as detailed in their security update guide.
Potential Impact
Successful exploitation of this heap-based buffer overflow could allow an attacker to execute arbitrary code on the affected system remotely, potentially leading to full compromise of the user environment. The vulnerability requires no privileges and only user interaction, making it a significant risk if unpatched.
Mitigation Recommendations
An official fix is available from Microsoft. Users and administrators should apply the security update provided by Microsoft as soon as possible to remediate this vulnerability. Refer to the Microsoft advisory at https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-56645 for patch details and update instructions.
CVE-2026-56645: CWE-122: Heap-based Buffer Overflow in Microsoft Microsoft Edge (Chromium-based)
Description
Heap-based buffer overflow in Microsoft Edge (Chromium-based) allows an unauthorized attacker to execute code over a network.
CVSS v3.1
Score 8.8high
Affected software
Microsoft
Microsoft Edge (Chromium-based)
Weaknesses
AI-Powered Analysis
Machine-generated threat intelligence
Technical Analysis
This vulnerability (CWE-122) in Microsoft Edge (Chromium-based) involves a heap-based buffer overflow that could be exploited by an attacker to execute arbitrary code remotely without privileges. The affected version is 1.0.0.0. Microsoft has published an official fix to address this issue as detailed in their security update guide.
Potential Impact
Successful exploitation of this heap-based buffer overflow could allow an attacker to execute arbitrary code on the affected system remotely, potentially leading to full compromise of the user environment. The vulnerability requires no privileges and only user interaction, making it a significant risk if unpatched.
Mitigation Recommendations
An official fix is available from Microsoft. Users and administrators should apply the security update provided by Microsoft as soon as possible to remediate this vulnerability. Refer to the Microsoft advisory at https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-56645 for patch details and update instructions.
Technical Details
- Data Version
- 5.2
- Assigner Short Name
- microsoft
- Date Reserved
- 2026-06-22T15:17:38.795Z
- Cvss Version
- 3.1
- State
- PUBLISHED
- Remediation Level
- official-fix
- Vendor Advisory Urls
- [{"url":"https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-56645","vendor":"Microsoft"}]
Threat ID: 6a4820ff27e9c79719acc390
Added to database: 07/03/2026, 20:52:15 UTC
Last enriched: 08/17/2026, 14:08:19 UTC
Last updated: 10/03/2026, 02:46:05 UTC
Views: 109
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