AUGUST 4, 2026
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Case File

CVE-2021-31987

HIGH · CVSS 7.5 EPSS 0.89%

Source: NVD + CISA KEV + EPSS (historical backfill) · Published 2021-10-05 · Last synced 2026-08-04

CyberRota Analysis

This is a high severity vulnerability with a CVSS score of 7.5. See the original NVD description below for full technical details.

CVE
CVE-2021-31987
Severity
HIGH
CVSS
7.5
EPSS
0.89%

Original NVD Description

A user controlled parameter related to SMTP test functionality is not correctly validated making it possible to bypass blocked network recipients.

Related CVEs

Other vulnerabilities affecting the same vendor(s)

CVE-2026-1185 MEDIUM CVE-2026-0804 MEDIUM CVE-2026-0802 MEDIUM CVE-2026-0541 MEDIUM CVE-2025-12063 MEDIUM CVE-2025-13064 MEDIUM