CVE-2021-28705

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

0.33% probability of exploitation activity in the next 30 days.

EPSS percentile

Ranks above 26.1% of scored records. A rank, not a probability.

NVD base score

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

NVD CVSS vector

CVSS:3.1/AV:L/AC:L/PR:L/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

2021-11-24 00:00Z4 YR AGO

Last updated

2024-08-03 21:47Z2 YR AGO

Reserved

2021-03-18

Assigning CNA

XEN

Record state

PUBLISHED

Severity

Not rated by the issuing CNA

CNA CVSS vector

Not published by the issuing CNA

Weaknesses

• CWE-755Improper Handling of Exceptional ConditionsClass

Data version

5.1

Document digest

48fd9e16f9117e5a3c7fece8955c8d61042ceb0483b4972bc18a384fb560b77e

• xenbits.xenproject.orghttps://xenbits.xenproject.org/xsa/advisory-389.txt
• lists.fedoraproject.orgFEDORA-2021-03645e9807https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/I7ZGWVVRI4XY2XSTBI3XEMWBXPDVX6OT/vendor-advisory
• www.debian.orgDSA-5017https://www.debian.org/security/2021/dsa-5017vendor-advisory
• lists.fedoraproject.orgFEDORA-2021-2b3a2de94fhttps://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/PXUI4VMD52CH3T7YXAG3J2JW7ZNN3SXF/vendor-advisory
• security.gentoo.orgGLSA-202402-07https://security.gentoo.org/glsa/202402-07vendor-advisory