CVE-2020-28388 describes a vulnerability in Siemens APOGEE/TALON field panels and Nucleus RTOS products where TCP Initial Sequence Numbers (ISNs) are generated using an insufficiently random source. This predictability allows an attacker to potentially hijack existing TCP sessions or spoof future connections. Rated as Medium severity (CVSS 5.3), the vulnerability requires no user interaction or privileges, but its impact is limited to integrity. There is no known active exploitation, public exploit code, or KEV listing, though it has garnered some community discussion and media coverage.
| Vendor | Product | Version(s) | CPE |
|---|---|---|---|
All Versions ImpactedCPE matchmatch criteria | cpe:2.3:a:siemens:capital_vstar:*:*:*:*:*:*:*:* | ||
< 5.2CPE matchmatch criteria | cpe:2.3:a:siemens:nucleus_net:*:*:*:*:*:*:*:* | ||
All Versions ImpactedCPE matchmatch criteria | cpe:2.3:a:siemens:nucleus_source_code:*:*:*:*:*:*:*:* | ||
All Versions ImpactedCPE matchmatch criteria | cpe:2.3:a:siemens:pluscontrol_1st_gen:*:*:*:*:*:*:*:* | ||
< 2012.12CPE matchmatch criteria | cpe:2.3:a:siemens:nucleus_readystart:*:*:*:*:*:*:*:* |
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:L
The average CVE in this peer group has 0.0 Twitter, 0.0 Reddit, 0.1 Bluesky, 0.0 Mastodon, and 0.4 GitHub mentions.
The average CVE in this peer group has 0.0 InfoSec Media, 0.0 Vendor Blog, and 0.0 Security Researcher mentions.
Remediation records are not available for this CVE.