What is CVE-2022-36978?

CVE-2022-36978 is a critical-severity vulnerability in Ivanti Avalanche, classified under Deserialization of Untrusted Data. CVSS score: 9.8/10. Published 2023-03-29.

How severe is CVE-2022-36978?

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

Deserialization in Ivanti Avalanche

CVE-2022-36978

This vulnerability allows remote attackers to execute arbitrary code on affected installations of Ivanti Avalanche 6.3.2.3490. Although authentication is required to exploit this vulnerability, the existing authentication mechanism can be bypassed. The specific flaw exists within the Notification Server service. The issue results from the lack of proper validation of user-supplied data, which can result in deserialization of untrusted data. An attacker can leverage this vulnerability to execute code in the context of the service account. Was ZDI-CAN-15448.

Vulnerability class: Insecure Deserialization

Published 2023-03-29 · 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: 0.073 (94.2th percentile), scored 2026-09-30.

Low probability of exploitation in the next 30 days, but still tracked. 94th percentile — 94.2% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS over last 30 days · oldest: 0.073 · newest: 0.073 · change: 0.000

Affected products

Ivanti Avalanche — versions 6.3.2.3490

Weakness classification (CWE)

CWE-502 — Deserialization of Untrusted Data

References

download.wavelink.com/Files/avalanche_v6.3.4_release_notes.txt (Release Notes)
www.zerodayinitiative.com/advisories/ZDI-22-783/ (VDB Entry, Third Party Advisory)

Frequently asked questions

What is CVE-2022-36978?: CVE-2022-36978 is a critical-severity vulnerability in Ivanti Avalanche, classified under Deserialization of Untrusted Data. CVSS score: 9.8/10. Published 2023-03-29.
How severe is CVE-2022-36978?: Critical severity. CVSS v3 base score is 9.8 out of 10.