CVE-2021-45553

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

0.97% probability of exploitation activity in the next 30 days.

EPSS percentile

Ranks above 59.4% of scored records. A rank, not a probability.

NVD base score

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

NVD CVSS vector

CVSS:3.1/AV:N/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

2021-12-26 00:51Z4 YR AGO

Last updated

2024-08-04 04:47Z2 YR AGO

Reserved

2021-12-25

Assigning CNA

mitre

Record state

PUBLISHED

Severity

High (CVSS 8.7)

CNA CVSS vector

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

Weaknesses

• CWE-77Improper Neutralization of Special Elements used in a Command ('Command Injection')Class

Data version

5.1

Document digest

35f2b675246fb13ff04de3631890a2301dd6f4a3a09caefad7c1bb9c6b4d6693

• kb.netgear.comhttps://kb.netgear.com/000064074/Security-Advisory-for-Post-Authentication-Command-Injection-on-Some-Routers-PSV-2019-0225x_refsource_MISC