CVE-2021-36754

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

64.86% probability of exploitation activity in the next 30 days.

EPSS percentile

Ranks above 99.2% of scored records. A rank, not a probability.

NVD base score

7.5 (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:N/I:N/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

2021-07-27 05:35Z5 YR AGO

Last updated

2024-08-04 01:01Z2 YR AGO

Reserved

2021-07-15

Assigning CNA

mitre

Record state

PUBLISHED

Severity

Not rated by the issuing CNA

CNA CVSS vector

Not published by the issuing CNA

Weaknesses

• CWE-119Improper Restriction of Operations within the Bounds of a Memory BufferClass

Data version

5.1

Document digest

fe314c254058f9c462243e57b437a089279e1ab0644b9641d0bf6a6b7cf644fc

• doc.powerdns.comhttps://doc.powerdns.com/authoritative/security-advisories/index.htmlx_refsource_MISC
• www.openwall.com[oss-security] 20210726 security advisory 2021-01 for PowerDNS Authoritative Server 4.5.0http://www.openwall.com/lists/oss-security/2021/07/26/2mailing-listx_refsource_MLIST
• doc.powerdns.comhttps://doc.powerdns.com/authoritative/security-advisories/powerdns-advisory-2021-01.htmlx_refsource_CONFIRM