CVE-2021-38487

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.
• AutomatableyesAn attacker can reliably automate reconnaissance through exploitation, so this scales.
• 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

3.38% probability of exploitation activity in the next 30 days.

EPSS percentile

Equal to or higher than the score of 88.3% of scored records. A rank, not a probability.

NVD base score

8.8 (CVSS v4.0), scored by the NVD independently of the CNA.

NVD CVSS vector

CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:L/VI:N/VA:H/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X

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

2022-05-05 15:18Z4 YR AGO

Last updated

2025-06-23 12:13Z1 YR AGO

Reserved

2021-08-10

Assigning CNA

icscert

Record state

PUBLISHED

Severity

High (CVSS 8.8)

CNA CVSS vector

CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:L/VI:N/VA:H/SC:N/SI:N/SA:N

Weaknesses

• CWE-406Insufficient Control of Network Message Volume (Network Amplification)Class
• CWE-923Improper Restriction of Communication Channel to Intended EndpointsClass

Data version

5.1

Document digest

aa22cb2339a825a7c434722a4a186616577f5737fa4250e76bd0ed7f56871a44

• www.rti.comhttps://www.rti.com/vulnerabilities/#cve-2021-38487
• www.cisa.govhttps://www.cisa.gov/uscert/ics/advisories/icsa-21-315-02
• support.rti.comhttps://support.rti.com/s/login/?ec=302&startURL=%2Fs%2F