CVE-2021-27395 is an authentication bypass vulnerability affecting Siemens SIMATIC Process Historian versions 2013, 2014 (prior to SP3 Update 6), 2019, and 2020. An unauthenticated interface allows a malicious actor to insert, modify, or delete critical data within the software. This vulnerability carries a CVSS score of 8.1 (High), indicating a high-impact threat. It can be exploited remotely over the network with low attack complexity and requires only low privileges, potentially leading to high integrity and availability impacts. Currently, there is no evidence of active exploitation, and no public exploit code (Metasploit, Nuclei, ExploitDB) is available. Community discussion and media coverage for this CVE are minimal.
| Vendor | Product | Version(s) | CPE |
|---|---|---|---|
All Versions ImpactedCPE matchmatch criteria | cpe:2.3:a:siemens:simatic_process_historian_2013:*:*:*:*:*:*:*:* | ||
Range not provided by sourceCPE matchmatch criteria | cpe:2.3:a:siemens:simatic_process_historian_2014:-:sp1:*:*:*:*:*:* | ||
Range not provided by sourceCPE matchmatch criteria | cpe:2.3:a:siemens:simatic_process_historian_2014:-:sp2:*:*:*:*:*:* | ||
Range not provided by sourceCPE matchmatch criteria | cpe:2.3:a:siemens:simatic_process_historian_2014:-:sp3:*:*:*:*:*:* | ||
Range not provided by sourceCPE matchmatch criteria | cpe:2.3:a:siemens:simatic_process_historian_2014:-:sp3_update4:*:*:*:*:*:* |
CVSS version used by this source: 3.1
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:H/A:H
The average CVE in this peer group has 0.0 Twitter, 0.0 Reddit, 0.3 Bluesky, 0.1 Mastodon, and 0.2 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.