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

Published 2025-07-12 · last modified 2026-06-17.

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.

EPSS exploit prediction

EPSS: 0.027 (85.2th percentile), scored 2026-09-30.

Low probability of exploitation in the next 30 days, but still tracked. 85th percentile — 85.2% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS over last 30 days · oldest: 0.018 · newest: 0.027 · change: +0.009

Affected products

Ivanti Avalanche — versions 6.4.0

Weakness classification (CWE)

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

References

forums.ivanti.com/s/article/Security-Advisory-Avalanche-CVE-2023-38036 (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.