CVE-2021-29827

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 ImpactpartialSuccessful exploitation gives limited 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

0.27% probability of exploitation activity in the next 30 days.

EPSS percentile

Equal to or higher than the score of 19.6% of scored records. A rank, not a probability.

NVD base score

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

NVD CVSS vector

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

NVD analysis status

Analyzed. 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

2024-12-18 23:44Z1 YR AGO

Last updated

2024-12-19 16:39Z1 YR AGO

Reserved

2021-03-31

Assigning CNA

ibm

Record state

PUBLISHED

Severity

Medium (CVSS 5.2)

CNA CVSS vector

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

Weaknesses

• CWE-1021Improper Restriction of Rendered UI Layers or FramesBase

Data version

5.1

Document digest

593186ab17e2507cd0534e05b90f4b4675417ca997f00acd31d30ba3f5e3bc41

• www.ibm.comhttps://www.ibm.com/support/pages/security-bulletin-ibm-infosphere-information-server-vulnerable-cross-frame-scripting-exploit-cve-2021-29827vendor-advisory