CVE-2020-28899

Exploitation

Not assessed. CISA has not published an exploitation assessment for this record, and it is not in the KEV catalog. That is an absence of assessment, not a finding of no risk.

SSVC decision

Not assessed by CISA

EPSS probability

1.63% probability of exploitation activity in the next 30 days.

EPSS percentile

Ranks above 74.1% of scored records. A rank, not a probability.

NVD base score

9.1 (CVSS v3.x), scored by the NVD independently of the CNA.

NVD CVSS vector

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:N

NVD analysis status

Modified. NVD last modified this record on 2026-06-17.

Red Hat severity

No Red Hat rating. Red Hat rates the CVEs that affect its products.

Exploit-prediction scores from FIRST. Independent scoring and analysis status from the NVD. Vendor severity from Red Hat. Exploitation assessment and catalog membership from CISA.

Published

2021-03-16 16:17Z5 YR AGO

Last updated

2024-08-04 16:41Z2 YR AGO

Reserved

2020-11-17

Assigning CNA

mitre

Record state

PUBLISHED

Severity

Not rated by the issuing CNA

CNA CVSS vector

Not published by the issuing CNA

Weaknesses

• CWE-306Missing Authentication for Critical FunctionBase

Data version

5.1

Document digest

0dd99243e929b8f0bb253ea76de3978371642eb8fe629f02fc25b36038e5098f

• www.zyxel.comhttps://www.zyxel.com/support/Zyxel-security-advisory-for-CGI-vulnerability-of-LTE.shtmlx_refsource_CONFIRM