CVE-2021-25214

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

5.99% probability of exploitation activity in the next 30 days.

EPSS percentile

Ranks above 92.7% of scored records. A rank, not a probability.

NVD base score

6.5 (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:N/I:N/A:H

NVD analysis status

Modified. NVD last modified this record on 2026-06-17.

Red Hat severity

Moderate. Red Hat's rating for its own products, not a CVSS rating.

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

2021-04-29 00:55Z5 YR AGO

Last updated

2024-09-17 00:37Z1 YR AGO

Reserved

2021-01-15

Assigning CNA

isc

Record state

PUBLISHED

Severity

Medium (CVSS 6.5)

CNA CVSS vector

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

Weaknesses

• CWE-617Reachable AssertionBase

Data version

5.1

Document digest

6a52ba3bab9b050ef03c27d4768a29f7cd366a63efd04de7485a32e639185383

• kb.isc.orghttps://kb.isc.org/v1/docs/cve-2021-25214x_refsource_CONFIRM
• www.openwall.com[oss-security] 20210428 ISC discloses three BIND vulnerabilities (CVE-2021-25214, CVE-2021-25215, and CVE-2021-25216)http://www.openwall.com/lists/oss-security/2021/04/29/1mailing-listx_refsource_MLIST
• www.openwall.com[oss-security] 20210429 Re: ISC discloses three BIND vulnerabilities (CVE-2021-25214, CVE-2021-25215, and CVE-2021-25216)http://www.openwall.com/lists/oss-security/2021/04/29/2mailing-listx_refsource_MLIST
• www.openwall.com[oss-security] 20210429 Re: ISC discloses three BIND vulnerabilities (CVE-2021-25214, CVE-2021-25215, and CVE-2021-25216)http://www.openwall.com/lists/oss-security/2021/04/29/3mailing-listx_refsource_MLIST
• www.openwall.com[oss-security] 20210429 Re: ISC discloses three BIND vulnerabilities (CVE-2021-25214, CVE-2021-25215, and CVE-2021-25216)http://www.openwall.com/lists/oss-security/2021/04/29/4mailing-listx_refsource_MLIST
• www.debian.orgDSA-4909https://www.debian.org/security/2021/dsa-4909vendor-advisoryx_refsource_DEBIAN
• lists.debian.org[debian-lts-announce] 20210504 [SECURITY] [DLA 2647-1] bind9 security updatehttps://lists.debian.org/debian-lts-announce/2021/05/msg00001.htmlmailing-listx_refsource_MLIST
• lists.fedoraproject.orgFEDORA-2021-ace61cbee1https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/VEC2XG4Q2ODTN2C4CGXEIXU3EUTBMK7L/vendor-advisoryx_refsource_FEDORA
• lists.fedoraproject.orgFEDORA-2021-47f23870echttps://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/ZDSRPCJQ7MZC6CENH5PO3VQOFI7VSWBE/vendor-advisoryx_refsource_FEDORA
• security.netapp.comhttps://security.netapp.com/advisory/ntap-20210521-0006/x_refsource_CONFIRM
• cert-portal.siemens.comhttps://cert-portal.siemens.com/productcert/pdf/ssa-389290.pdfx_refsource_CONFIRM