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Case File

CVE-2021-43533

MEDIUM · CVSS 4.3 EPSS 0.54%

Source: NVD + CISA KEV + EPSS (historical backfill) · Published 2021-12-08 · Last synced 2026-08-04

CyberRota Analysis

This is a medium severity vulnerability with a CVSS score of 4.3. It affects Firefox.

CVE
CVE-2021-43533
Severity
MEDIUM
CVSS
4.3
EPSS
0.54%
Firefox

Original NVD Description

When parsing internationalized domain names, high bits of the characters in the URLs were sometimes stripped, resulting in inconsistencies that could lead to user confusion or attacks such as phishing. This vulnerability affects Firefox < 94.

Related CVEs

Other vulnerabilities affecting the same vendor(s)

CVE-2026-16412 CRITICAL CVE-2026-16411 CRITICAL CVE-2026-16410 CRITICAL CVE-2026-16409 HIGH CVE-2026-16408 CRITICAL CVE-2026-16407 CRITICAL