What is CVE-2023-38036?

CVE-2023-38036 is a critical-severity vulnerability in Ivanti Avalanche, classified under Buffer Copy without Checking Size of Input (Classic Buffer Overflow). CVSS score: 9.8/10. Published 2025-07-12.

How severe is CVE-2023-38036?

Critical severity. CVSS v3 base score is 9.8 out of 10.

Buffer overflow in Ivanti Avalanche

CVE-2023-38036

A security vulnerability within Ivanti Avalanche Manager before version 6.4.1 may allow an unauthenticated attacker to create a buffer overflow that could result in service disruption or arbitrary code execution.

Vulnerability class: Buffer Overflow

EPSS: 0.018 (76.3th percentile) — read the EPSS interpretation.

CVSS v3 metric

CVSS v3 base score 9.8 (Critical). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H.

Affected products

Ivanti Avalanche — versions 6.4.0

Weakness classification (CWE)

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

References

support@hackerone.com (Vendor Advisory)

Frequently asked questions

What is CVE-2023-38036?: CVE-2023-38036 is a critical-severity vulnerability in Ivanti Avalanche, classified under Buffer Copy without Checking Size of Input (Classic Buffer Overflow). CVSS score: 9.8/10. Published 2025-07-12.
How severe is CVE-2023-38036?: Critical severity. CVSS v3 base score is 9.8 out of 10.