CVE-2021-21830 is a critical heap-based buffer overflow vulnerability in AT&T Labs’ Xmill 0.7, specifically within the XML Decompression LabelDict::Load functionality. This flaw allows an unauthenticated attacker to achieve remote code execution by providing a specially crafted XMI file. With a CVSS score of 9.8, it poses a severe risk due to its network-based attack vector, low attack complexity, and high impact on confidentiality, integrity, and availability. Despite its critical severity, there is currently no evidence of active exploitation, public exploit code (Metasploit, Nuclei, ExploitDB), or significant community discussion or media coverage.
| Vendor | Product | Version(s) | CPE |
|---|---|---|---|
0.7CPE matchmatch criteria | cpe:2.3:a:att:xmill:0.7:*:*:*:*:*:*:* |
CVSS version used by this source: 3.0
CVSS:3.0/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H
The average CVE in this peer group has 0.0 Twitter, 0.1 Reddit, 0.3 Bluesky, 0.3 Mastodon, and 2.4 GitHub mentions.
No media coverage found for this CVE.
The average CVE in this peer group has 0.3 InfoSec Media, 0.0 Vendor Blog, and 0.0 Security Researcher mentions.
Remediation records are not available for this CVE.