CVE-2021-45530

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

0.87% probability of exploitation activity in the next 30 days.

EPSS percentile

Ranks above 56.1% 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 00:57Z4 YR AGO

Last updated

2024-08-04 04:39Z2 YR AGO

Reserved

2021-12-25

Assigning CNA

mitre

Record state

PUBLISHED

Severity

Medium (CVSS 4.5)

CNA CVSS vector

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

Weaknesses

• CWE-120Buffer Copy without Checking Size of Input ('Classic Buffer Overflow')Base

Data version

5.1

Document digest

6da2ff81bcafeb732d5c70a32e0cb6cbdfefba8201b8ed1783a60056893be6c6

• kb.netgear.comhttps://kb.netgear.com/000064486/Security-Advisory-for-Post-Authentication-Buffer-Overflow-on-Some-Routers-PSV-2020-0320x_refsource_MISC