AUGUST 4, 2026
Live Feed
Back to database
Case File

CVE-2021-21827

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

AI analysis pending.

CVE
CVE-2021-21827
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. Within `DecodeTreeBlock` which is called during the decompression of an XMI file, a UINT32 is loaded from the file and used as trusted input as the length of a buffer. An attacker can provide a malicious file to trigger this vulnerability.