What is CVE-2023-33613?

CVE-2023-33613 is a medium-severity vulnerability in Axtls Project, classified under Out-of-bounds Write. CVSS score: 5.5/10. Published 2023-06-06.

How severe is CVE-2023-33613?

Medium severity. CVSS v3 base score is 5.5 out of 10.

Buffer overflow in Axtls Project

CVE-2023-33613

axTLS v2.1.5 was discovered to contain a heap buffer overflow in the bi_import function in axtls-code/crypto/bigint.c. This vulnerability allows attackers to cause a Denial of Service (DoS) when parsing a private key.

Vulnerability class: Buffer Overflow

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

CVSS v3 metric

CVSS v3 base score 5.5 (Medium). Vector: CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H.

EPSS exploit prediction

EPSS: 0.003 (20.4th percentile), scored 2026-09-30.

Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 20th percentile — 20.4% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS over last 30 days · oldest: 0.003 · newest: 0.003 · change: 0.000

Affected products

Axtls Project — versions 2.1.5

Weakness classification (CWE)

CWE-787 — Out-of-bounds Write

References

sourceforge.net/p/axtls/mailman/message/37843071/ (Exploit, Mailing List, Third Party Advisory)

Frequently asked questions

What is CVE-2023-33613?: CVE-2023-33613 is a medium-severity vulnerability in Axtls Project, classified under Out-of-bounds Write. CVSS score: 5.5/10. Published 2023-06-06.
How severe is CVE-2023-33613?: Medium severity. CVSS v3 base score is 5.5 out of 10.