Vulnerability · Published Aug 13, 2021 · Assigned by talos

CVE-2021-21829

High 8.1

In plain English

A high-severity heap buffer overflow in AT&T. There are no confirmed reports of exploitation so far. The chance it is exploited in the next 30 days is estimated at 2.5% (higher than 85% of all known vulnerabilities).

Severity (CVSS 3.0)8.1High

Exploit odds (30 days)2.5%top 14.9% of all CVEs

Exploited in the wildNo reportsnot in CISA KEV

Attack toolingNoneno public tooling known

Official description

A heap-based buffer overflow vulnerability exists in the XML Decompression EnumerationUncompressor::UncompressItem functionality of AT&T Labs’ Xmill 0.7. A specially crafted XMI file can lead to remote code execution. An attacker can provide a malicious file to trigger this vulnerability.

Affected products (as reported)

Vendor	Product	Versions
n/a	AT&T	AT&T Labs Xmill 0.7

Weakness: CWE-122 · Vector: CVSS:3.0/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H

References

https://talosintelligence.com/vulnerability_reports/TALOS-2021-1292 x_refsource_MISC