Is CVE-2023-52389 actively exploited?

No active exploitation of CVE-2023-52389 has been confirmed so far. Continue monitoring, as exploit status can change.

Can CVE-2023-52389 be exploited remotely?

Yes. CVE-2023-52389 is exploitable remotely over the network (CVSS attack vector: Network).

What is the CVSS score of CVE-2023-52389?

CVE-2023-52389 has a CVSS score of 9.8 (CRITICAL).

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CRITICAL

CVE-2023-52389

CWE-190Published: January 27, 2024· Updated: Jun 17, 2026

9.8

CVSS v3.1

Official Description

UTF32Encoding.cpp in POCO has a Poco::UTF32Encoding integer overflow and resultant stack buffer overflow because Poco::UTF32Encoding::convert() and Poco::UTF32::queryConvert() may return a negative integer if a UTF-32 byte sequence evaluates to a value of 0x80000000 or higher. This is fixed in 1.11.8p2, 1.12.5p2, and 1.13.0.

NVD Source

Risk Analysis

POCO libraries contain an integer overflow in UTF-32 encoding, leading to a stack buffer overflow. This critical vulnerability allows for potential arbitrary code execution and is rated with a CVSS score of 9.8.

No public exploit is known, and it is not in the CISA KEV catalog. The vulnerability is remotely exploitable.

Recommended Action

Upgrade POCO to version 1.11.8p2, 1.12.5p2, 1.13.0, or later. Ensure that applications using POCO for string encoding are updated to the latest secure release.

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-2023-52389 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.