CVE-2021-35033

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

0.40% probability of exploitation activity in the next 30 days.

EPSS percentile

Ranks above 32.7% of scored records. A rank, not a probability.

NVD base score

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

NVD CVSS vector

CVSS:3.1/AV:L/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

2021-11-23 21:20Z4 YR AGO

Last updated

2024-08-04 00:33Z2 YR AGO

Reserved

2021-06-17

Assigning CNA

Zyxel

Record state

PUBLISHED

Severity

High (CVSS 7.8)

CNA CVSS vector

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

Weaknesses

• CWE-260Password in Configuration FileBase
• CWE-287Improper AuthenticationClass

Data version

5.1

Document digest

f96fb10f2066d34dce2afffa0cc884f8151be7d4f20ff8634de18aad574b44aa

• www.zyxel.comhttps://www.zyxel.com/support/Zyxel_security_advisory_for_pre-configured_password_management_vulnerability_of_home_routers_and_WiFi_systems.shtmlx_refsource_CONFIRM
• www.tenable.comhttps://www.tenable.com/security/research/tra-2022-06x_refsource_MISC