CVE-2018-11458 describes a critical vulnerability in the integrated VNC server of Siemens SINUMERIK 828D V4.7 and 840D sl V4.7/V4.8 controllers. A remote attacker can achieve privileged code execution by sending specially crafted network requests to port 5900/tcp, provided this port is manually opened in the firewall. This vulnerability has a CVSS score of 8.1 (High) due to its network attack vector, low attack complexity, and potential for complete compromise of confidentiality, integrity, and availability. While no public exploits were known at the time of advisory publication and it is not listed in CISA KEV, it has received some community discussion and media coverage, indicating awareness.
| Vendor | Product | Version(s) | CPE |
|---|---|---|---|
<= 4.7CPE matchmatch criteria | cpe:2.3:o:siemens:sinumerik_828d_v4.7_firmware:*:*:*:*:*:*:*:* | ||
<= 4.7CPE matchmatch criteria | cpe:2.3:o:siemens:sinumerik_840d_sl_v4.7_firmware:*:*:*:*:*:*:*:* | ||
<= 4.8CPE matchmatch criteria | cpe:2.3:o:siemens:sinumerik_840d_sl_v4.8_firmware:*:*:*:*:*:*:*:* |
CVSS version used by this source: 3.0
CVSS:3.0/AV:N/AC:H/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, 0.1 Bluesky, 0.1 Mastodon, and 0.2 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.