CVE-2021-28684

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

0.92% probability of exploitation activity in the next 30 days.

EPSS percentile

Ranks above 57.6% of scored records. A rank, not a probability.

NVD base score

4.3 (CVSS v3.x), scored by the NVD independently of the CNA.

NVD CVSS vector

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

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

2021-06-21 12:13Z5 YR AGO

Last updated

2024-08-03 21:47Z2 YR AGO

Reserved

2021-03-18

Assigning CNA

mitre

Record state

PUBLISHED

Severity

Not rated by the issuing CNA

CNA CVSS vector

Not published by the issuing CNA

Weaknesses

• CWE-611Improper Restriction of XML External Entity ReferenceBase

Data version

5.1

Document digest

a06916d440e36b2687bec0901ab2deec2d68bca9f238043a4e90ed6b8baaf16e

• www.powerarchiver.comhttps://www.powerarchiver.comx_refsource_MISC
• peterka.techhttps://peterka.tech/blog/posts/cve-2021-28684/x_refsource_MISC