EUVD-2026-41646
GHSA-vqcc-q5p5-r9q5
Vulnerability Assessment
| Weakness |
CWE
ASVS 5.0
V15 - Secure Coding and Architecture Heap buffer bounds checking
MITRE ATT&CK
1 technique across 1 tactic: Execution The technique list with ATT&CK links and the kill-chain view is part of the Basic plan and up. |
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Alert meAnalysisAIv1 – Jul 03, 2026
Remote code execution in Microsoft Edge (Chromium-based) stems from a heap-based buffer overflow (CWE-122) that a network attacker can trigger when a victim renders crafted web content. The CVSS 3.1 base score is 8.8 with a network vector requiring user interaction (UI:R), and Microsoft has released an official fix (RL:O). No public exploit identified at time of analysis — the temporal metric E:U marks exploit code as unproven — and it is not listed in CISA KEV.
Affected VersionsENISA
Affected Packages
Source: OSV (Open Source Vulnerabilities)
Affects your stack
Affects 2 packages in microsoft, euvd
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- Exploit and PoC references, threat intelligence from 22 sources
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Severity by source
AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H
Primary rating from Vendor (microsoft).
CVSS VectorVendor: microsoft
DescriptionCVE.org
Heap-based buffer overflow in Microsoft Edge (Chromium-based) allows an unauthorized attacker to execute code over a network.
Executive ViewAI
Microsoft Edge contains a remote code execution vulnerability (CVE-2026-56645, CVSS 8.8) that allows network attackers to execute arbitrary code when users visit malicious websites. No public exploit is identified at time of analysis. Successful exploitation could grant attackers full system access, enabling theft of sensitive data, installation of malware, and disruption of business operations across your organization.
24 hours: Issue security alert to all Edge users and restrict access to untrusted websites where feasible. 7 days: Deploy patched version per Microsoft's advisory through your standard patch management process to all Edge installations. 30 days: Verify patch deployment across the organization and review logs for any exploitation attempts against unpatched systems.
Apply vendor patch.
Threat Intelligence Overview
NVD
CVE.org
EPSS
Vulnrichment
VulDB
How this decision was reached
The engine reads each signal below and applies a fixed list of rules from top to bottom. The first rule that matches sets the recommended action – like a statement, every line is shown.
What every action level means
SSVC AssessmentENISA
Priority Score
Attack Technique
A buffer overflow occurs when a program writes more data to a memory buffer than it was allocated to hold, causing the excess data to spill into adjacent memory regions.
A heap overflow occurs when a program writes data beyond the bounds of a buffer allocated in the heap memory region.
Security-feature bypass in Microsoft Edge (Chromium-based) versions prior to 150.0.4078.48 lets a remote, unauthenticate
Remote code execution in Microsoft Edge (Chromium-based) lets an attacker run arbitrary code in the browser by getting a
Remote code execution in Microsoft Edge (Chromium-based) before 151.0.4129.59 allows a network attacker to run arbitrary
Remote code execution via buffer over-read in Microsoft Edge (Chromium-based) versions prior to 151.0.4129.59 affects au
Remote code execution in Microsoft Edge (Chromium-based) prior to version 151.0.4129.59 is achievable by an unauthentica
Use-after-free memory corruption in Microsoft Edge (Chromium-based) can let remote attackers execute arbitrary code in t
Remote code execution in Microsoft Edge (Chromium-based) stems from a use-after-free memory corruption flaw (CWE-416) th
Remote code execution in Microsoft Edge (Chromium-based) allows an unauthenticated attacker to run arbitrary code by lur
Remote code execution in Microsoft Edge (Chromium-based) is enabled by a type confusion vulnerability (CWE-843) that can
Remote code execution in Microsoft Edge (Chromium-based) before version 150.0.4078.48 allows an unauthenticated remote a
Remote code execution in Microsoft Edge (Chromium-based) stems from a use-after-free (CWE-416) memory-corruption flaw th
Remote code execution in Microsoft Edge (Chromium-based) lets an unauthenticated network attacker run arbitrary code by
Exploit-DB