How severe is CVE-2021-2416?

CVE-2021-2416 has a CVSS 3.x base score of 4.9, rated medium severity. It is exploitable over network with low attack complexity, requires high privileges and no user interaction. Impact on confidentiality is none, integrity none, and availability high.

Is CVE-2021-2416 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (55th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2021-2416?

CVE-2021-2416 primarily affects Oracle Communications Session Border Controller. In total, 2 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.

How do I fix CVE-2021-2416?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.

When was CVE-2021-2416 published?

CVE-2021-2416 was published on 2021-10-20 and last updated on 2026-06-17.

CVE-2021-2416

CVE-2021-2416 is a medium-severity vulnerability in Oracle Communications Session Border Controller with a CVSS 3.x base score of 4.9. It is not currently listed as actively exploited by CISA, and its EPSS exploit-prediction score is low.

Key facts

Severity: Medium (CVSS 3.x base score 4.9)
CVSS v2: 6.8
EPSS exploit prediction: 1% (55th percentile)
Actively exploited: Not listed in CISA KEV
Affected product: Oracle Communications Session Border Controller
Published: 2021-10-20
Last modified: 2026-06-17

Description

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).

Frequently asked questions

What is CVE-2021-2416?: 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).
How severe is CVE-2021-2416?: CVE-2021-2416 has a CVSS 3.x base score of 4.9, rated medium severity. It is exploitable over network with low attack complexity, requires high privileges and no user interaction. Impact on confidentiality is none, integrity none, and availability high.
Is CVE-2021-2416 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (55th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2021-2416?: CVE-2021-2416 primarily affects Oracle Communications Session Border Controller. In total, 2 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.
How do I fix CVE-2021-2416?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.
When was CVE-2021-2416 published?: CVE-2021-2416 was published on 2021-10-20 and last updated on 2026-06-17.

References

https://www.oracle.com/security-alerts/cpuoct2021.html

Affected products (2)

cpe:2.3:a:oracle:communications_session_border_controller:8.4:*:*:*:*:*:*:*
cpe:2.3:a:oracle:communications_session_border_controller:9.0:*:*:*:*:*:*:*

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