Dashboard / CVE-2026-66305

CVE-2026-66305

HIGH
MEDIUM Priority: 0.04 BB Relevance: 64/100
Published: 2026-09-08 Modified: 2026-10-30 First seen: 2026-10-30 Status: active

Attack Surface

Network Low Complexity No Interaction Integ. Impact

CVSS Vector Breakdown

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

Description

Use of client-side authentication in Skype for Business allows an authorized attacker to perform spoofing over a network.

Weakness Classification (1)

Affected Software (3)

VendorProductVersion
Microsoft Skype for Business Server 2015 CU13 9319.0 < 6.0.9319.885
Microsoft Skype for Business Server 2019 CU8 2046.0 < 7.0.2046.569
Microsoft Skype for Business Server Subscription Edition CU1 2046.0 < 7.0.2046.879

References & Advisories (1)

Bug Bounty Relevance

64 / 100
✓ Network accessible
✓ Low complexity
✓ No user interaction

CVSS Score

7.1 / 10.0 v3.1
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:H/A:N/E:U/RL:O/RC:C

EPSS — Exploitation Probability

0.53%
Raw Score 0.005260
Percentile 44.6%
Date 2026-10-30

Intelligence Sources

mitre ref →

External Links