CVE-2021-27386 is a heap allocation leak vulnerability in the SmartVNC device layout handler on the client side, affecting numerous Siemens SIMATIC HMI Comfort Panels, KTP Mobile Panels, WinCC Runtime Advanced versions, and various SINAMICS products. This vulnerability has a CVSSv3.1 score of 7.5 (HIGH), indicating it can be exploited remotely with low attack complexity and no user interaction, leading to a Denial-of-Service condition. There is no evidence of active exploitation, public exploit code (Metasploit, Nuclei, ExploitDB), or significant community discussion or media coverage surrounding this CVE.
| Vendor | Product | Version(s) | CPE |
|---|---|---|---|
< 16CPE matchmatch criteria | cpe:2.3:a:siemens:simatic_wincc_runtime_advanced:*:*:*:*:*:*:*:* | ||
16CPE matchmatch criteria | cpe:2.3:a:siemens:simatic_wincc_runtime_advanced:16:-:*:*:*:*:*:* | ||
16CPE matchmatch criteria | cpe:2.3:a:siemens:simatic_wincc_runtime_advanced:16:update1:*:*:*:*:*:* | ||
16CPE matchmatch criteria | cpe:2.3:a:siemens:simatic_wincc_runtime_advanced:16:update2:*:*:*:*:*:* | ||
16CPE matchmatch criteria | cpe:2.3:a:siemens:simatic_wincc_runtime_advanced:16:update3:*:*:*:*:*:* |
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.