What is CVE-2024-33453?

CVE-2024-33453 is a high-severity vulnerability in Espressif Esp-Idf, classified under Buffer Copy without Checking Size of Input (Classic Buffer Overflow). CVSS score: 8.1/10. Published 2024-10-17.

How severe is CVE-2024-33453?

High severity. CVSS v3 base score is 8.1 out of 10.

Is CVE-2024-33453 known to be exploited?

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

Buffer overflow in Espressif Esp-Idf

CVE-2024-33453

Buffer Overflow vulnerability in esp-idf v.5.1 allows a remote attacker to obtain sensitive information via the externalId component.

Vulnerability class: Buffer Overflow

Published 2024-10-17 · last modified 2026-06-17.

CVSS v3 metric

CVSS v3 base score 8.1 (High). Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:N.

EPSS exploit prediction

EPSS: 0.010 (60.1th percentile), scored 2026-09-25.

Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 60th percentile — 60.1% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS over last 30 days · oldest: 0.010 · newest: 0.010 · change: 0.000

Affected products

Espressif Esp-Idf — versions 5.1

Weakness classification (CWE)

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

Public proof-of-concept exploits

References

github.com/Ant1sec-ops/CVE-2024-33453 (Third Party Advisory, Mitigation)

Frequently asked questions

What is CVE-2024-33453?: CVE-2024-33453 is a high-severity vulnerability in Espressif Esp-Idf, classified under Buffer Copy without Checking Size of Input (Classic Buffer Overflow). CVSS score: 8.1/10. Published 2024-10-17.
How severe is CVE-2024-33453?: High severity. CVSS v3 base score is 8.1 out of 10.
Is CVE-2024-33453 known to be exploited?: 3 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.