Is CVE-2023-21890 actively exploited?

No active exploitation of CVE-2023-21890 has been confirmed so far. Continue monitoring, as exploit status can change.

Can CVE-2023-21890 be exploited remotely?

Yes. CVE-2023-21890 is exploitable remotely over the network (CVSS attack vector: Network).

What is the CVSS score of CVE-2023-21890?

CVE-2023-21890 has a CVSS score of 9.8 (CRITICAL).

HOME VULNERABILITIESCVE-2023-21890

CRITICAL

CVE-2023-21890

NVD-CWE-noinfoPublished: January 18, 2023· Updated: Jun 17, 2026

9.8

CVSS v3.1

Official Description

Vulnerability in the Oracle Communications Converged Application Server product of Oracle Communications (component: Core). Supported versions that are affected are 7.1.0 and 8.0.0. Easily exploitable vulnerability allows unauthenticated attacker with network access via UDP to compromise Oracle Communications Converged Application Server. Successful attacks of this vulnerability can result in takeover of Oracle Communications Converged Application Server. CVSS 3.1 Base Score 9.8 (Confidentiality, Integrity and Availability impacts). CVSS Vector: (CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H).

NVD Source

Risk Analysis

This vulnerability allows an unauthenticated attacker to gain full control over the Oracle Communications Converged Application Server via network access. Given the critical CVSS score of 9.8, this flaw represents a significant risk to system confidentiality, integrity, and availability.

There is no known public exploit for this vulnerability, and it is not currently listed in CISA's KEV catalog. It is remotely exploitable due to the network-based attack vector.

Recommended Action

Users should apply the latest security patches provided by Oracle for versions 7.1.0 and 8.0.0.

Generated by the CTIWATCH analysis pipeline from this CVE's metadata (CVSS, EPSS, KEV status, exploit intelligence). Verify against vendor advisories before acting.

Technical Analysis

CVE-2023-21890 can be exploited remotely over the network without requiring physical or adjacent access, significantly expanding the attack surface for threat actors.

The vulnerability requires no privileges and no user interaction, making it a prime target for automated exploitation campaigns and worm-like propagation.

A successful exploit results in complete confidentiality breach (data exposure), full integrity compromise (data manipulation), availability disruption (denial of service), with a CVSS base score of 9.8.