CVE-2021-40368 is a Denial-of-Service vulnerability affecting numerous Siemens SIMATIC S7-400 and S7-410 CPU families. An unauthenticated attacker can exploit this by sending specially crafted packets to port 102/tcp, causing the affected device to crash and require a manual restart. This vulnerability carries a CVSS score of 7.5 (HIGH), indicating a significant risk due to its network-based attack vector, low attack complexity, and complete loss of availability. There is no confidentiality or integrity impact. Currently, there is no evidence of active exploitation, public exploit code (Metasploit, Nuclei, ExploitDB), or significant community discussion or media coverage regarding this CVE.
| Vendor | Product | Version(s) | CPE |
|---|---|---|---|
< 6.0.10CPE matchmatch criteria | cpe:2.3:o:siemens:simatic_s7-400h_v6_firmware:*:*:*:*:*:*:*:* | ||
All Versions ImpactedCPE matchmatch criteria | cpe:2.3:o:siemens:simatic_s7-400_pn\/dp_v7_firmware:*:*:*:*:*:*:*:* | ||
All Versions ImpactedCPE matchmatch criteria | cpe:2.3:o:siemens:simatic_s7-410_v8_firmware:*:*:*:*:*:*:*:* | ||
< 10.1CPE matchmatch criteria | cpe:2.3:o:siemens:simatic_s7-410_v10_firmware:*:*:*:*:*:*:*:* |
CVSS version used by this source: 3.1
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/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.
No media coverage found for this CVE.
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.