CVE-2023-22421 is an out-of-bounds read vulnerability affecting Kostac PLC Programming Software (formerly Koyo PLC Programming Software) versions 1.6.9.0 and earlier. This flaw stems from insufficient buffer size for PLC program instructions, allowing a specially crafted project file to trigger the vulnerability. Rated 7.8 HIGH, successful exploitation requires user interaction (opening the malicious file) and can lead to information disclosure, arbitrary code execution, and full system compromise. There is currently no public exploit code or active exploitation observed, but it has garnered some community discussion and media coverage, including a CISA warning.
| Vendor | Product | Version(s) | CPE |
|---|---|---|---|
<= 1.6.9.0CPE matchmatch criteria | cpe:2.3:a:jtekt:kostac_plc_programming_software:*:*:*:*:*:*:*:* |
CVSS version used by this source: 3.1
CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H
The average CVE in this peer group has 0.0 Twitter, 0.1 Reddit, 0.1 Bluesky, 0.0 Mastodon, and 0.2 GitHub mentions.
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.