Heap-based Buffer Overflow in Microsoft Edge by Microsoft
CVE-2026-85897

8.8HIGH

Key Information:

Vendor

Microsoft
Status
Microsoft Edge (chromium-based)
Vendor
CVE Published:
29 October 2026

What is CVE-2026-85897?

A heap-based buffer overflow vulnerability in Microsoft Edge (Chromium-based) can enable an unauthorized attacker to execute arbitrary code over a network. This flaw arises from improper handling of memory operations, potentially allowing attackers to execute malicious scripts or commands on affected systems. Users are advised to apply the latest security updates released by Microsoft to mitigate risks associated with this vulnerability.

Affected Version(s)

Microsoft Edge (Chromium-based) 1.0.0.0 < 154.0.4258.37

References

https://msrc.microsoft.com/update-guide/vulnerability/CVE...
vendor-advisorypatch

CVSS V3.1

Score:
8.8
Severity:
HIGH
Confidentiality:
High
Integrity:
High
Availability:
High
Attack Vector:
Network
Attack Complexity:
Low
Privileges Required:
None
User Interaction:
Required
Scope:
Unchanged

Timeline

  • Vulnerability published

  • Vulnerability Reserved

.