CVE-2021-35217

Name: CVE-2021-35217
Creator: NVD / NIST
Published: 2021-09-08T14:15:12.117+00:00
License: https://creativecommons.org/publicdomain/zero/1.0/

HIGHCVSS 8.8/10EPSS 73.85%

Last modified Jun 17, 2026

CVE-2021-35217 is a high-severity vulnerability rated 8.8/10 on the CVSS scale. Insecure Deseralization of untrusted data remote code execution vulnerability was discovered in Patch Manager Orion Platform Integration module and reported to us by ZDI. An Authenticated Attacker could exploit it by executing WSAsyncExecuteTasks deserialization of untrusted data.. EPSS estimates a 73.85% chance of exploitation in the next 30 days.

Description

Insecure Deseralization of untrusted data remote code execution vulnerability was discovered in Patch Manager Orion Platform Integration module and reported to us by ZDI. An Authenticated Attacker could exploit it by executing WSAsyncExecuteTasks deserialization of untrusted data.

Metrics

CVSS 3.1

8.8/10

CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

EPSS Probability

73.85%

99.4th percentile

Probability of exploitation in the next 30 days. Learn more

Weakness Enumeration

CWE-502

Affected Software

Vendor	Product	Versions
Solarwinds	Patch Manager	<= 2020.2.5

References

https://documentation.solarwinds.com/en/success_center/orionplatform/content/core-secure-configuration.htmVendor Advisory
https://documentation.solarwinds.com/en/success_center/orionplatform/content/release_notes/orion_platform_2020-2-6_release_notes.htmRelease Notes, Vendor Advisory
https://www.solarwinds.com/trust-center/security-advisories/cve-2021-35217Vendor Advisory
https://www.zerodayinitiative.com/advisories/ZDI-21-1247/Third Party Advisory, VDB Entry
https://documentation.solarwinds.com/en/success_center/orionplatform/content/core-secure-configuration.htmVendor Advisory
https://documentation.solarwinds.com/en/success_center/orionplatform/content/release_notes/orion_platform_2020-2-6_release_notes.htmRelease Notes, Vendor Advisory
https://www.solarwinds.com/trust-center/security-advisories/cve-2021-35217Vendor Advisory
https://www.zerodayinitiative.com/advisories/ZDI-21-1247/Third Party Advisory, VDB Entry

Timeline

Published: Sep 8, 2021
Last Modified: Jun 17, 2026
Status: Modified

Frequently Asked Questions

What is CVE-2021-35217?

How severe is CVE-2021-35217?

CVE-2021-35217 has a CVSS score of 8.8/10 (HIGH severity). The EPSS model estimates a 73.85% probability of exploitation in the next 30 days.

How do I fix CVE-2021-35217?

Check the vendor references and advisories linked above for patched versions and mitigation guidance. You can also run a Strix scan to test if your systems are affected.

Are you affected by CVE-2021-35217?

Run a free Strix scan to check your systems for this vulnerability.

Scan your code now

Source: NVD / NIST