What is CVE-2023-4590?

CVE-2023-4590 is a high-severity vulnerability in Frhed, classified under Buffer Copy without Checking Size of Input (Classic Buffer Overflow). CVSS score: 7.3/10. Published 2023-11-27.

How severe is CVE-2023-4590?

High severity. CVSS v3 base score is 7.3 out of 10.

Is CVE-2023-4590 known to be exploited?

2 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.

Buffer overflow in Frhed

CVE-2023-4590

Buffer overflow vulnerability in Frhed hex editor, affecting version 1.6.0. This vulnerability could allow an attacker to execute arbitrary code via a long filename argument through the Structured Exception Handler (SEH) registers.

Vulnerability class: Buffer Overflow

Published 2023-11-27 · last modified 2026-06-17.

CVSS v3 metric

CVSS v3 base score 7.3 (High). Vector: CVSS:3.1/AV:L/AC:L/PR:L/UI:R/S:U/C:H/I:H/A:H.

EPSS exploit prediction

EPSS: 0.011 (64.3th percentile), scored 2026-10-01.

Low probability of exploitation in the next 30 days, but still tracked. 64th percentile — 64.3% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS over last 30 days · oldest: 0.011 · newest: 0.011 · change: 0.000

Affected products

Frhed — versions 1.6.0
Kimmov Frhed — versions 1.6.0

Weakness classification (CWE)

CWE-120 — Buffer Copy without Checking Size of Input (Classic Buffer Overflow)

Public proof-of-concept exploits

References

www.incibe.es/en/incibe-cert/notices/aviso/buffer-overflow-vulnerability-frhed (Third Party Advisory)

Frequently asked questions

What is CVE-2023-4590?: CVE-2023-4590 is a high-severity vulnerability in Frhed, classified under Buffer Copy without Checking Size of Input (Classic Buffer Overflow). CVSS score: 7.3/10. Published 2023-11-27.
How severe is CVE-2023-4590?: High severity. CVSS v3 base score is 7.3 out of 10.
Is CVE-2023-4590 known to be exploited?: 2 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.