CVE-2021-26709

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

40.08% probability of exploitation activity in the next 30 days.

EPSS percentile

Ranks above 98.5% 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

2021-04-07 10:45Z5 YR AGO

Last updated

2024-08-03 20:33Z2 YR AGO

Reserved

2021-02-05

Assigning CNA

mitre

Record state

PUBLISHED

Severity

Not rated by the issuing CNA

CNA CVSS vector

Not published by the issuing CNA

Weaknesses

• CWE-787Out-of-bounds WriteBase

Data version

5.1

Document digest

dea342de10411f07d151790be61bf34ae18d2f6ecf6f9fbbad56d615a5ca2a4b

• www.dlink.comhttps://www.dlink.com/en/security-bulletinx_refsource_MISC
• supportannouncement.us.dlink.comhttps://supportannouncement.us.dlink.com/announcement/publication.aspx?name=SAP10216x_refsource_MISC
• seclists.org20210408 CVE-2021-26709 - Multiple Pre-Auth Stack Buffer Overflow in D-Link DSL-320B-D1 ADSL Modemhttp://seclists.org/fulldisclosure/2021/Apr/15mailing-listx_refsource_FULLDISC
• packetstormsecurity.comhttp://packetstormsecurity.com/files/162133/D-Link-DSL-320B-D1-Pre-Authentication-Buffer-Overflow.htmlx_refsource_MISC