AUGUST 4, 2026

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Case File

CVE-2021-26421

MEDIUM · CVSS 6.5 EPSS 1.41%

Source: NVD + CISA KEV + EPSS (historical backfill) · Published 2021-05-11 · Last synced 2026-08-04

CyberRota Analysis

This is a medium severity vulnerability with a CVSS score of 6.5. See the original NVD description below for full technical details.

CVE

CVE-2021-26421

Severity

MEDIUM

CVSS

6.5

EPSS

1.41%

Original NVD Description

Skype for Business and Lync Spoofing Vulnerability

Related CVEs

Other vulnerabilities affecting the same vendor(s)

CVE-2026-18018 MEDIUM CVE-2026-17992 MEDIUM CVE-2026-17932 MEDIUM CVE-2026-17908 MEDIUM CVE-2026-17900 MEDIUM CVE-2026-17863 HIGH