AUGUST 4, 2026
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Case File

CVE-2021-21828

CRITICAL · CVSS 9.8 EPSS 1.14%

Source: NVD + CISA KEV + EPSS (historical backfill) · Published 2021-08-20 · Last synced 2026-08-04

CyberRota Analysis

This is a critical severity vulnerability with a CVSS score of 9.8. See the original NVD description below for full technical details.

CVE
CVE-2021-21828
Severity
CRITICAL
CVSS
9.8
EPSS
1.14%

Original NVD Description

A heap-based buffer overflow vulnerability exists in the XML Decompression DecodeTreeBlock functionality of AT&T Labs Xmill 0.7. In the default case of DecodeTreeBlock a label is created via CurPath::AddLabel in order to track the label for later reference. An attacker can provide a malicious file to trigger this vulnerability.

Related CVEs

Other vulnerabilities affecting the same vendor(s)