Vulnerability record · CVE-2021-2416 · published 20 October 2021

CVE-2021-2416: Oracle communications session border controller vulnerability

Oracle · Communications Session Border Controller

Vulnerability in the Oracle Communications Session Border Controller product of Oracle Communications (component: Routing). Supported versions that are affected are 8.4 and 9.0. Easily exploitable vulnerability allows high privileged attacker with network access via HTTP to compromise Oracle Communications Session Border Controller. Successful attacks of this vulnerability can result in unauthorized ability to cause a hang or frequently repeatable crash (complete DOS) of Oracle Communications Session Border Controller. CVSS 3.1 Base Score 4.9 (Availability impacts). CVSS Vector: (CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:N/I:N/A:H).

4.9 CVSS 3.1 Medium EPSS 0.93% · top 41.0%

4.9CVSS 3.1 base score, v2 6.8

0.93%EPSS exploitation probability, 30 days

NoNot in CISA KEV

1Affected product versions listed by NVD

2References

17 Jun 2026Last modified by NVD

Description

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

Affected products

1 vulnerable configurations from NVD's CPE data, grouped by vendor and product.

Communications Session Border Controller Oracle

References

Link	Tags
https://www.oracle.com/security-alerts/cpuoct2021.html	Vendor Advisory
https://www.oracle.com/security-alerts/cpuoct2021.html	Vendor Advisory

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Source: NIST National Vulnerability Database (record CVE-2021-2416), CISA KEV, FIRST EPSS (scores of 2026-09-27). This page is refreshed as NVD updates the record.