7.5

CVE-2020-28393: siemens scalance_xm-400_firmware Incorrect Calculation

CVSS: 7.5v3.1HighModified
Published 12-05-2021Last modified 04-08-2024
Open JSON

Vulnerability summary

CVE-2020-28393 is a high (CVSS 7.5) Incorrect Calculation vulnerability in siemens scalance_xm-400_firmware. EPSS estimates a 1.63% chance of exploitation in the next 30 days, higher than 75.8% of scored vulnerabilities.

Overall risk
30/100
0100
Medium · default modelHow is this calculated?
CVSS score
7.5/10
010
High · v3.1 (NVD)
EPSS score
1.63%
0%100%
Low · 0.00 pp in 30 days
KEVNot listedIn no KEV catalog
RansomwareNone recordedNo known use recorded
Public exploits0No public exploits recorded

Timeline

  1. 12-05-2021
    PublishedVulnerability first disclosed.
  2. 04-08-2024
    Last modifiedVulnerability information updated.

Description

An unauthenticated remote attacker could create a permanent denial-of-service condition by sending specially crafted OSPF packets. Successful exploitation requires OSPF to be enabled on an affected device on the SCALANCE XM-400, XR-500 (All versions prior to v6.4).

CVSS metrics

2 scores · 1 source · 2 versions

EPSS trend

Probability

1.63%

Chance of exploitation in the next 30 days

Percentile

76%

Versus all other CVEs

30-day change

0.00 pp

From 1.63% on 18-09-2026

18-09-202618-10-2026
EPSS score
1.63%

Known exploited

Compare KEV catalogs

Not in any of the 3 tracked catalogs.

Public exploits

0 found

No public exploits indexed.

Weaknesses

CWE · root cause

Affected systems

Siemens11 products

1 vendor · 11 products

References

2 links