CVE-2021-27804

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

3.99% probability of exploitation activity in the next 30 days.

EPSS percentile

Ranks above 89.6% 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

2021-03-02 00:30Z5 YR AGO

Last updated

2024-08-03 21:33Z2 YR AGO

Reserved

2021-02-26

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

c396db58832461750ff363e1d5bb64e5e845a415eabca6afe5892f9825bc78c9

• gitlab.comhttps://gitlab.com/wg1/jpeg-xl/-/tagsx_refsource_MISC
• www.openwall.comhttp://www.openwall.com/lists/oss-security/2021/03/01/3x_refsource_MISC
• seclists.org20210302 Multiple Vulnerabilities in jpeg-xl (CVE-2021-27804)http://seclists.org/fulldisclosure/2021/Mar/2mailing-listx_refsource_FULLDISC
• packetstormsecurity.comhttp://packetstormsecurity.com/files/161623/jpeg-xl-0.3.1-Memory-Corruption.htmlx_refsource_MISC