CVE-2021-33485 is a critical heap-based buffer overflow vulnerability affecting CODESYS Control Runtime systems prior to version 3.5.17.10, impacting various CODESYS products including Control, Control RTE, and HMI. With a CVSS score of 9.8, it allows unauthenticated remote attackers to achieve full compromise (confidentiality, integrity, availability) with low attack complexity. While there is no evidence of active exploitation, public exploit code, or inclusion in CISA's KEV catalog, the vulnerability has garnered some community discussion and media coverage, indicating awareness within the cybersecurity community.
| Vendor | Product | Version(s) | CPE |
|---|---|---|---|
< 4.2.0.0CPE matchmatch criteria | cpe:2.3:a:codesys:control:*:*:*:*:*:beaglebone_sl:*:* | ||
< 4.2.0.0CPE matchmatch criteria | cpe:2.3:a:codesys:control:*:*:*:*:*:empc-a\/imx6_sl:*:* | ||
< 4.2.0.0CPE matchmatch criteria | cpe:2.3:a:codesys:control:*:*:*:*:*:iot2000_sl:*:* | ||
<= 4.2.0.0CPE matchmatch criteria | cpe:2.3:a:codesys:control:*:*:*:*:*:linux_sl:*:* | ||
< 4.2.0.0CPE matchmatch criteria | cpe:2.3:a:codesys:control:*:*:*:*:*:pfc100_sl:*:* |
CVSS version used by this source: 3.1
CVSS:3.1/AV:N/AC:L/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.
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.