What is CVE-2020-27632?

CVE-2020-27632 is a high-severity vulnerability in Siemens Simatic Mv420. CVSS score: 7.5/10. Published 2021-03-10.

How severe is CVE-2020-27632?

High severity. CVSS v3 base score is 7.5 out of 10.

Vulnerability in Siemens Simatic Mv420

CVE-2020-27632

In SIMATIC MV400 family versions prior to v7.0.6, the ISN generator is initialized with a constant value and has constant increments. An attacker could predict and hijack TCP sessions.

EPSS: 0.012 (65.4th percentile) — read the EPSS interpretation.

CVSS v3 metric

CVSS v3 base score 7.5 (High). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N.

Affected products

Siemens Simatic_mv420
Siemens Simatic_mv420_firmware
Siemens Simatic_mv440
Siemens Simatic_mv440_firmware
N/a — versions n/a

References

cve@mitre.org (Vendor Advisory)
cve@mitre.org
cve@mitre.org

Frequently asked questions

What is CVE-2020-27632?: CVE-2020-27632 is a high-severity vulnerability in Siemens Simatic Mv420. CVSS score: 7.5/10. Published 2021-03-10.
How severe is CVE-2020-27632?: High severity. CVSS v3 base score is 7.5 out of 10.