CVE-2021-29421

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

1.68% probability of exploitation activity in the next 30 days.

EPSS percentile

Equal to or higher than the score of 76.8% of scored records. A rank, not a probability.

NVD base score

7.5 (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:N/A:N

NVD analysis status

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

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

2021-04-01 00:00Z5 YR AGO

Last updated

2024-08-03 22:02Z2 YR AGO

Reserved

2021-03-29

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

3bdd28f0abc1495a07e1f8be651ee8b199ea35d85f4976438e7e3e197cb8331a

• github.comhttps://github.com/pikepdf/pikepdf/commit/3f38f73218e5e782fe411ccbb3b44a793c0b343a
• lists.fedoraproject.orgFEDORA-2021-4bf9909a76https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/3QFLBBYGEDNXJ7FS6PIWTVI4T4BUPGEQ/vendor-advisory
• lists.fedoraproject.orgFEDORA-2021-d97bc581behttps://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/36P4HTLBJPO524WMQWW57N3QRF4RFSJG/vendor-advisory
• github.comhttps://github.com/pikepdf/pikepdf/blob/v2.10.0/docs/release_notes.rst#v2100