No exploitation reportedFix available

CVE-2021-35216

Q: Is CVE-2021-35216 actively exploited?

Active exploitation of CVE-2021-35216 has not been confirmed. Its EPSS score was 81.4% on 2026-10-22, the estimated probability of exploitation in the next 30 days.

Q: What is the CVSS score for CVE-2021-35216?

CVE-2021-35216 has a CVSS v3 base score of 8.8 (HIGH severity), with vector string CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H.

No exploitation reported by the sources we read.

Published2021-09-01
Fixed in2020.2.6
WeaknessCWE-502

Am I affected?

With a domain, we read the version its public headers and pages expose. A distribution build can carry the fix under an older number.

Description

Insecure Deserialization of untrusted data remote code execution vulnerability was discovered in Patch Manager Orion Platform Integration module. An Authenticated Attacker with network access via HTTP can compromise this vulnerability can result in Remote Code Execution.

Timeline

dates in UTC

2021-09-0115:15CVE publishedNVD
2026-10-2319:23EPSS crossed 10 %FIRST EPSS

Observed activity

isMalicious corpus · updated 2026-10-23 21:37 UTC

Indicators tagged with this CVE, per day0 indicators over 7 days

Block these indicators

Firewall list (EDL, text): https://api.ismalicious.com/edl/cve/CVE-2021-35216?format=txt
CSV export: https://api.ismalicious.com/edl/cve/CVE-2021-35216?format=csv
TAXII collection of exploited CVEs
The EDL and CSV take an API key on the Pro plan.

Versions per branch

NVD

Solarwinds patch manager

Branch	Affected	Fixed in	Source
2020.2	< 2020.2.6	2020.2.6	NVD

as publishedRanges as NVD and OSV publish them; a distribution’s build can be fixed under an older number.

Fix

Update Solarwinds patch manager to 2020.2.6

Advisories and patches

documentation.solarwinds.comRelease Notes · Vendor Advisory
www.solarwinds.comPatch · Vendor Advisory

Detection

Nuclei template: none so far
Exploit-DB: no entry
Proof-of-concept repositories: none listed

Sources

CNACVSS 3.18.9read 2026-10-23
NVDCVSS 3.18.8read 2026-10-23
NVDCVSS 2.09read 2026-10-23
CNAweakness (CWE)CWE-502read 2026-10-23
NVDweakness (CWE)CWE-502read 2026-10-23
FIRST EPSSEPSS score81.4 %read 2026-10-23

Technical details

CVSS v3 Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
Published: 2021-09-01
Last Modified: 2026-06-17
NVD status: Modified

Frequently asked questions

What is CVE-2021-35216?

Is CVE-2021-35216 actively exploited?

Active exploitation of CVE-2021-35216 has not been confirmed. Its EPSS score was 81.4% on 2026-10-22, the estimated probability of exploitation in the next 30 days.

What is the CVSS score for CVE-2021-35216?

CVE-2021-35216 has a CVSS v3 base score of 8.8 (HIGH severity), with vector string CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H.

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