CVE-2021-39509

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

5.10% probability of exploitation activity in the next 30 days.

EPSS percentile

Ranks above 91.6% of scored records. A rank, not a probability.

NVD base score

9.8 (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: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

2021-08-24 18:52Z5 YR AGO

Last updated

2024-08-04 02:06Z2 YR AGO

Reserved

2021-08-23

Assigning CNA

mitre

Record state

PUBLISHED

Severity

Not rated by the issuing CNA

CNA CVSS vector

Not published by the issuing CNA

Weaknesses

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

Data version

5.1

Document digest

8c89a2db8a3da9985fab00432a93e1cdabfda8523aa49bff3b771f7e798304f2

• www.dlink.comhttps://www.dlink.com/en/security-bulletin/x_refsource_MISC
• github.comhttps://github.com/doudoudedi/main-DIR-816_A2_Command-injection/blob/main/injection.mdx_refsource_MISC
• github.comhttps://github.com/doudoudedi/main-DIR-816_A2_Command-injectionx_refsource_MISC