Is CVE-2023-4491 actively exploited?

No active exploitation of CVE-2023-4491 has been confirmed so far. Continue monitoring, as exploit status can change.

Can CVE-2023-4491 be exploited remotely?

Yes. CVE-2023-4491 is exploitable remotely over the network (CVSS attack vector: Network).

What is the CVSS score of CVE-2023-4491?

CVE-2023-4491 has a CVSS score of 9.8 (CRITICAL).

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CRITICAL

CVE-2023-4491

CWE-119Published: October 4, 2023· Updated: Jun 17, 2026

9.8

CVSS v3.1

Official Description

Buffer overflow vulnerability in Easy Address Book Web Server 1.6 version. The exploitation of this vulnerability could allow an attacker to send a very long username string to /searchbook.ghp, asking for the name via a POST request, resulting in arbitrary code execution on the remote machine.

NVD Source

Risk Analysis

Easy Address Book Web Server 1.6 contains a buffer overflow vulnerability triggered by long username strings sent via POST requests. This critical flaw enables remote code execution, posing a significant security risk.

No public exploit is known, and it is not in the KEV catalog. It is remotely exploitable with low complexity.

Recommended Action

Restrict access to the affected web server or apply vendor-provided patches to fix the buffer overflow.

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-2023-4491 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.

From a weakness classification perspective (CWE-119): Buffer overflow vulnerabilities can lead to arbitrary code execution or denial of service by corrupting adjacent memory.