CVE-2018-16557 is a denial-of-service vulnerability affecting numerous Siemens SIMATIC S7-400 and S7-410 CPU families, including SIPLUS variants. An unauthenticated attacker can exploit this by sending specially crafted packets to port 102/tcp via Ethernet, PROFIBUS, or MPI interfaces. This can cause the CPU to enter a denial-of-service state, requiring a firmware re-flash for recovery, thus compromising system availability. Rated with a CVSS score of 8.2 (High), this vulnerability has a network attack vector and low attack complexity, requiring no user interaction or prior privileges if access protection is not configured. While the EPSS score is low, indicating a low probability of exploitation in the wild, its FAUCET Risk Score is 63/100. Currently, there is no public exploit code available in Metasploit, Nuclei, or ExploitDB, and it is not listed on the CISA KEV catalog. Community discussion and media coverage for this CVE are minimal, suggesting it is not widely known or actively exploited.
| Vendor | Product | Version(s) | CPE |
|---|---|---|---|
<= v6.0CPE matchmatch criteria | cpe:2.3:o:siemens:simatic_s7-400_firmware:*:*:*:*:*:*:*:* | ||
All Versions ImpactedCPE matchmatch criteria | cpe:2.3:o:siemens:simatic_s7-400_pn\/dp_v7_firmware:*:*:*:*:*:*:*:* | ||
<= v4.5CPE matchmatch criteria | cpe:2.3:o:siemens:simatic_s7-400h_firmware:*:*:*:*:*:*:*:* | ||
< 8.2.1CPE matchmatch criteria | cpe:2.3:o:siemens:simatic_s7-410_firmware:*:*:*:*:*:*:*:* | ||
>= 6.0.0, < 6.0.9CPE matchmatch criteria | cpe:2.3:o:siemens:simatic_s7-400h_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:L/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.