CVE-2026-56645

HIGH
MEDIUM Priority: 0.07 BB Relevance: 68/100
Published: 2026-07-03 Modified: 2026-10-28 First seen: 2026-10-29 Status: active

Attack Surface

Network Low Complexity No Auth Conf. Impact Integ. Impact

CVSS Vector Breakdown

AV: Network
AC: Low
PR: None
UI: Required
S: Unchanged
C: High
I: High
A: High

Description

Heap-based buffer overflow in Microsoft Edge (Chromium-based) allows an unauthorized attacker to execute code over a network.

Affected Software (3)

VendorProductVersion
Microsoft Microsoft Edge (Chromium-based) 1.0.0.0 < 150.0.4078.48
Microsoft Microsoft Edge (Chromium-based) 1.0.0.0 < 150.0.4078.48
microsoft edge_chromium < 150.0.4078.48

References & Advisories (1)

Bug Bounty Relevance

68 / 100
✓ Network accessible
✓ No authentication
✓ Low complexity

CVSS Score

8.8 / 10.0 v3.1
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H/E:U/RL:O/RC:C

EPSS — Exploitation Probability

0.82%
Raw Score 0.008190
Percentile 57.1%
Date 2026-10-29

EPSS Trend

2026-10-29
0.00819
2026-10-28
0.00819

Intelligence Sources

mitre ref →
nvd ref →