CVE-2021-39226

Exploitation

Exploited in the wild. Listed in the CISA Known Exploited Vulnerabilities catalog on 2022-08-25. Federal remediation due 2022-09-15.

SSVC decision

• ExploitationactiveCISA reports credible evidence of active exploitation.
• AutomatableyesAn attacker can reliably automate reconnaissance through exploitation, so this scales.
• Technical ImpacttotalSuccessful exploitation gives total control of the vulnerable component.

CISA publishes the decision points, not a final SSVC decision. The decision also depends on mission and well-being impact, which is a property of your deployment rather than of the vulnerability.

EPSS probability

99.93% probability of exploitation activity in the next 30 days.

EPSS percentile

Equal to or higher than the score of 99.9% of scored records. A rank, not a probability.

NVD base score

7.3 (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:L/I:L/A:L

NVD analysis status

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

Red Hat severity

Important. 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

2021-10-05 17:30Z5 YR AGO

Last updated

2025-10-21 23:25Z1 YR AGO

Reserved

2021-08-16

Assigning CNA

GitHub_M

Record state

PUBLISHED

Severity

Critical (CVSS 9.8)

CNA CVSS vector

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

Weaknesses

• CWE-287Improper AuthenticationClass
• CWE-862Missing AuthorizationClass
• CWE-639Authorization Bypass Through User-Controlled KeyBase

Data version

5.1

Document digest

c4a238685f672e94b35514875d1372ae6988a3cf1807909c08d3769d386841c2

• github.comhttps://github.com/grafana/grafana/security/advisories/GHSA-69j6-29vr-p3j9x_refsource_CONFIRM
• github.comhttps://github.com/grafana/grafana/commit/2d456a6375855364d098ede379438bf7f0667269x_refsource_MISC
• grafana.comhttps://grafana.com/docs/grafana/latest/release-notes/release-notes-7-5-11/x_refsource_MISC
• grafana.comhttps://grafana.com/docs/grafana/latest/release-notes/release-notes-8-1-6/x_refsource_MISC
• www.openwall.com[oss-security] 20211005 CVE-2021-39226 Grafana snapshot authentication bypasshttp://www.openwall.com/lists/oss-security/2021/10/05/4mailing-listx_refsource_MLIST
• lists.fedoraproject.orgFEDORA-2021-dd83dc8b0bhttps://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/E6ANHRDBXQT6TURLP2THM26ZPDINFBEG/vendor-advisoryx_refsource_FEDORA
• security.netapp.comhttps://security.netapp.com/advisory/ntap-20211029-0008/x_refsource_CONFIRM
• lists.fedoraproject.orgFEDORA-2021-01588ab0bfhttps://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/DCKBFUSY6V4VU5AQUYWKISREZX5NLQJT/vendor-advisoryx_refsource_FEDORA
• www.cisa.govhttps://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2021-39226government-resource