CVE-2021-34866

Exploitation

Assessed, none found. CISA's assessment recorded neither public exploit code nor evidence of exploitation when it was made.

SSVC decision

• ExploitationnoneCISA recorded no public exploit code and no evidence of exploitation.
• AutomatablenoAt least one step from reconnaissance to exploitation cannot be reliably automated.
• 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

0.97% probability of exploitation activity in the next 30 days.

EPSS percentile

Equal to or higher than the score of 61.7% 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 2026-10-08.

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

2022-01-25 15:30Z4 YR AGO

Last updated

2026-10-08 21:03Z20 DAYS AGO

Reserved

2021-06-17

Assigning CNA

zdi

Record state

PUBLISHED

Severity

High (CVSS 8.8)

CNA CVSS vector

CVSS:3.0/AV:L/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H

Weaknesses

• CWE-843Access of Resource Using Incompatible Type ('Type Confusion')Base
• CWE-697Incorrect ComparisonPillar

Data version

5.2

Document digest

89e7b53d78c012106fe7e9ce48530ac80f8a751aebe75764a6bbb0b271576e0c

• www.zerodayinitiative.comhttps://www.zerodayinitiative.com/advisories/ZDI-21-1148/x_refsource_MISC
• security.netapp.comhttps://security.netapp.com/advisory/ntap-20220217-0008/x_refsource_CONFIRM