Dashboard / CVE-2026-87705

CVE-2026-87705

HIGH
MEDIUM Priority: 0.03 BB Relevance: 60/100
Published: 2026-10-13 Modified: 2026-10-29 First seen: 2026-10-29 Status: active

Attack Surface

Adjacent Low Complexity No Auth No Interaction Conf. Impact Scope Change

CVSS Vector Breakdown

AV: Adjacent
AC: Low
PR: None
UI: None
S: Changed
C: High
I: None
A: None

Description

Improper verification of source of a communication channel in Windows Hyper-V allows an unauthorized attacker to bypass a security feature over an adjacent network.

Weakness Classification (1)

Affected Software (27)

VendorProductVersion
Microsoft Windows 10 Version 1607 10.0.14393.0 < 10.0.14393.9612
microsoft windows_10_1607 < 10.0.14393.9612
microsoft windows_10_1607 < 10.0.14393.9612
microsoft windows_10_1809 < 10.0.17763.9376
microsoft windows_10_1809 < 10.0.17763.9376
microsoft windows_10_21h2 < 10.0.19044.7807
microsoft windows_10_21h2 < 10.0.19044.7807
microsoft windows_10_21h2 < 10.0.19044.7807
microsoft windows_10_22h2 < 10.0.19045.7807
microsoft windows_10_22h2 < 10.0.19045.7807
microsoft windows_10_22h2 < 10.0.19045.7807
microsoft windows_11_23h2 < 10.0.22631.7652
microsoft windows_11_23h2 < 10.0.22631.7652
microsoft windows_11_24h2 < 10.0.26100.9711
microsoft windows_11_24h2 < 10.0.26100.9711
microsoft windows_11_25h2 < 10.0.26200.9711
microsoft windows_11_25h2 < 10.0.26200.9711
microsoft windows_11_26h1 < 10.0.28000.3231
microsoft windows_11_26h1 < 10.0.28000.3231
microsoft windows_11_26h2 < 10.0.26300.9711
microsoft windows_11_26h2 < 10.0.26300.9711
microsoft windows_server_2012 -
microsoft windows_server_2012 r2
microsoft windows_server_2016 < 10.0.14393.9612
microsoft windows_server_2019 < 10.0.17763.9376
microsoft windows_server_2022 < 10.0.20348.5761
microsoft windows_server_2025 < 10.0.26100.33650

References & Advisories (1)

Bug Bounty Relevance

60 / 100
✓ No authentication
✓ Low complexity
✓ No user interaction

CVSS Score

7.4 / 10.0 v3.1
CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:C/C:H/I:N/A:N/E:U/RL:O/RC:C

EPSS — Exploitation Probability

0.43%
Raw Score 0.004320
Percentile 37.4%
Date 2026-10-29

EPSS Trend

2026-10-29
0.00432
2026-10-28
0.00441

Intelligence Sources

mitre ref →
nvd ref →

External Links