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CVE Record

CVE-2021-2416: Vulnerability in the Oracle Communications Session Border Controller product of Oracle Communications (comp...

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).

MediumCVSS 4.9Not KEV-listedUpdated
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Glexia's TakeAutomated analysismoderate

Security readout for executives and security teams

Plain-English summary

CVE-2021-2416 can let a highly privileged user with HTTP network access crash or hang Oracle Communications Session Border Controller. The known impact is service availability, not data theft or tampering. For organizations using affected SBC versions, the business concern is disruption to communications routing services.

Executive priority

Treat as a moderate availability risk. Prioritize if the affected SBC supports critical voice, carrier, contact-center, or emergency communications workflows, or if administrative HTTP access is broadly reachable.

Technical view

The vulnerability affects the Routing component of Oracle Communications Session Border Controller versions 8.4 and 9.0. It is network exploitable over HTTP, requires high privileges, and requires no user interaction. Successful exploitation can cause a hang or frequently repeatable complete denial of service. CVSS v3.1 score is 4.9.

Likely exposure

Exposure is limited to organizations running Oracle Communications Session Border Controller 8.4 or 9.0, especially where HTTP access to the system is reachable by administrative users over a network.

Exploitation context

The source bundle does not indicate active exploitation, and this CVE is not listed as KEV. The privilege requirement is high, so realistic risk centers on compromised administrator accounts, excessive management-plane access, or malicious insiders.

Researcher notes

Evidence supports a high-privilege HTTP-triggered denial-of-service condition only. The bundle names affected versions and impact, but does not provide root cause details, fixed versions, exploit observations, or vendor workarounds beyond the Oracle advisory reference.

Mitigation direction

  • Check Oracle's October 2021 Critical Patch Update for vendor remediation guidance.
  • Apply Oracle-supported updates or patches applicable to affected SBC versions.
  • Restrict HTTP management access to trusted administrative networks only.
  • Review administrative account access and remove unnecessary high-privilege users.

Validation and detection

  • Inventory Oracle Communications Session Border Controller deployments and versions.
  • Confirm whether versions 8.4 or 9.0 are present in production or staging.
  • Review Oracle advisory applicability and local patch status.
  • Check availability monitoring for unexplained SBC hangs or repeated crashes.
  • Verify HTTP access is limited to approved administrative paths.
Prepared
Confidence
high
Sources
3

Public sources used

Generated from the cited source records. This long-tail analysis has not been individually reviewed by a named human.

Potential ATT&CK relevance

Conservative CVE-to-ATT&CK context

These mappings and lookup hints may be relevant to the vulnerability behavior, CWE, affected product, or exposure path. Glexia-inferred context is not an official MITRE, ATT&CK, CWE, or CVE Program mapping.

ATT&CK lookup starting points

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CVE-2021-2416 mapping review

Open the CVE-to-ATT&CK bridge for reviewed, inferred, or future official mappings tied to this CVE.

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Vulnerability profileCVE Program record
Severity
Medium
CVSS
4.9 (3.1)
Known Exploited
No
Published

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

Official CVE source material

CNA and ADP enrichment extracted from CVE v5

These fields come from the CVE record and ADP containers, not from Glexia's Take. They preserve time-varying source decisions such as CISA SSVC, KEV status, CVSS metrics, and provider references.

1CVSS vectors
0Timeline events
0ADP providers
2Source links

CVSS vector scores

1 official score

We collect every scored CVSS vector available in the official CNA and ADP containers. When more than one version is present, the table keeps the source vectors side by side instead of collapsing them into the highest score.

ScoreVersionSeverityVectorExploitImpactSource
4.9CVSS 3.1MediumCVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:N/I:N/A:H1.23.6Primary CVE score

Vulnerability scoring details

Base CVSS 3.1 score

4.9Medium
CVSS 3.1 vector shape for CVE-2021-2416Attack VectorAttack ComplexityPrivileges RequiredUser InteractionScopeConfidentiality ImpactIntegrity ImpactAvailability Impact

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

Attack Vector
NetworkAdjacentLocalPhysical
Attack Complexity
LowHigh
Privileges Required
NoneLowHigh
User Interaction
NoneRequired
Scope
ChangedUnchanged
Confidentiality Impact
HighLowNone
Integrity Impact
HighLowNone
Availability Impact
HighLowNone

Source materials

Affected products

Products and packages named in the record

VendorProductVersion / packageStatus
Oracle CorporationCommunications Session Border Controller8.4, 9.0Listed
Weakness

CWE details

No CWE listed

CWE links open Glexia weakness intelligence pages with official CWE context, developer remediation guidance, and related CVE mappings.