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) involves a heap-based buffer overflow in Microsoft Edge (Chromium-based) that could be exploited by an attacker to execute arbitrary code remotely without privileges. The vulnerability affects version 1.0.0.0 of Microsoft Edge (Chromium-based). Microsoft has published an official fix to address this issue.
Potential Impact
Successful exploitation of this vulnerability could allow an attacker to execute arbitrary code on the affected system remotely, leading to full compromise including confidentiality, integrity, and availability impacts. The CVSS vector indicates network attack vector, low attack complexity, no privileges required, user interaction required, and high impact on confidentiality, integrity, and availability.
Mitigation Recommendations
An official fix is available from Microsoft. Users and administrators should apply the security update provided by Microsoft as detailed in the vendor advisory at https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-56645 to remediate this vulnerability.
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
Weaknesses
AI-Powered Analysis
Machine-generated threat intelligence
Technical Analysis
This vulnerability (CWE-122) involves a heap-based buffer overflow in Microsoft Edge (Chromium-based) that could be exploited by an attacker to execute arbitrary code remotely without privileges. The vulnerability affects version 1.0.0.0 of Microsoft Edge (Chromium-based). Microsoft has published an official fix to address this issue.
Potential Impact
Successful exploitation of this vulnerability could allow an attacker to execute arbitrary code on the affected system remotely, leading to full compromise including confidentiality, integrity, and availability impacts. The CVSS vector indicates network attack vector, low attack complexity, no privileges required, user interaction required, and high impact on confidentiality, integrity, and availability.
Mitigation Recommendations
An official fix is available from Microsoft. Users and administrators should apply the security update provided by Microsoft as detailed in the vendor advisory at https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-56645 to remediate this vulnerability.
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: 07/03/2026, 21:04:06 UTC
Last updated: 07/03/2026, 22:52:06 UTC
Views: 3
Community Reviews
0 reviewsCrowdsource mitigation strategies, share intel context, and vote on the most helpful responses. Sign in to add your voice and help keep defenders ahead.
Want to contribute mitigation steps or threat intel context? Sign in or create an account to join the community discussion.
Actions
Updates to AI analysis require Pro Console access. Upgrade inside Console → Billing.
External Links
Need more coverage?
Upgrade to Pro Console for AI refresh and higher limits.
For incident response and remediation, OffSeq services can help resolve threats faster.
Latest Threats
Check if your credentials are on the dark web
Instant breach scanning across billions of leaked records. Free tier available.