CVE-2021-37748

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

7.41% probability of exploitation activity in the next 30 days.

EPSS percentile

Ranks above 94.0% 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

2021-10-28 11:11Z4 YR AGO

Last updated

2024-08-04 01:30Z2 YR AGO

Reserved

2021-07-30

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

7742df68c8e5458577e36cf1b5d8ae62e9bae4993cec797d06dbd3f0698edb59

• www.grandstream.comhttp://www.grandstream.com/products/gateways-and-atas/analog-telephone-adaptors/product/ht801x_refsource_MISC
• www.secforce.comhttps://www.secforce.com/blog/exploiting-grandstream-ht801-ata-cve-2021-37748-cve-2021-37915/x_refsource_MISC
• github.comhttps://github.com/SECFORCE/CVE-2021-37748x_refsource_MISC