CVE-2021-35031

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

0.46% probability of exploitation activity in the next 30 days.

EPSS percentile

Ranks above 38.1% of scored records. A rank, not a probability.

NVD base score

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

NVD CVSS vector

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

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

2021-12-28 10:36Z4 YR AGO

Last updated

2024-08-04 00:33Z2 YR AGO

Reserved

2021-06-17

Assigning CNA

Zyxel

Record state

PUBLISHED

Severity

Medium (CVSS 6.8)

CNA CVSS vector

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

Weaknesses

• CWE-78Improper Neutralization of Special Elements used in an OS Command ('OS Command Injection')Base

Data version

5.1

Document digest

3e7e282ef504dd9d1a98071c0004caa3cc52bff8f87fba3a67d863da786c9fe1

• www.zyxel.comhttps://www.zyxel.com/support/Zyxel_security_advisory_for_OS_command_injection_vulnerabilities_of_switches.shtmlx_refsource_CONFIRM