CVE-2021-20595 is an Improper Restriction of XML External Entity Reference (XXE) vulnerability affecting numerous Mitsubishi Electric Air Conditioning System controllers and adapters. This flaw allows a remote, unauthenticated attacker to disclose sensitive data or cause a Denial of Service (DoS) by sending specially crafted packets. The vulnerability carries a CVSS v3.1 score of 8.2 (HIGH), indicating a severe risk. Its attack vector is network-based with low attack complexity, requiring no user interaction or privileges, and can lead to partial confidentiality loss and high availability impact. Currently, there is no evidence of active exploitation (KEV: No), nor are there public exploit modules available in Metasploit, Nuclei, or ExploitDB. Despite this, the vulnerability has garnered some community discussion and media coverage, suggesting awareness within the cybersecurity landscape.
| Vendor | Product | Version(s) | CPE |
|---|---|---|---|
>= 2.50, <= 3.35CPE matchmatch criteria | cpe:2.3:o:mitsubishi:g-50a_firmware:*:*:*:*:*:*:*:* | ||
>= 2.50, <= 3.35CPE matchmatch criteria | cpe:2.3:o:mitsubishi:gb-50a_firmware:*:*:*:*:*:*:*:* | ||
<= 3.20CPE matchmatch criteria | cpe:2.3:o:mitsubishi:ag-150a-a_firmware:*:*:*:*:*:*:*:* | ||
<= 3.20CPE matchmatch criteria | cpe:2.3:o:mitsubishi:ag-150a-j_firmware:*:*:*:*:*:*:*:* | ||
<= 3.20CPE matchmatch criteria | cpe:2.3:o:mitsubishi:gb-50ada-a_firmware:*:*:*:*:*:*:*:* |
CVSS version used by this source: 3.1
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:H
The average CVE in this peer group has 0.0 Twitter, 0.0 Reddit, 0.1 Bluesky, 0.1 Mastodon, and 0.4 GitHub mentions.
The average CVE in this peer group has 0.1 InfoSec Media, 0.0 Vendor Blog, and 0.0 Security Researcher mentions.
Remediation records are not available for this CVE.