Is CVE-2021-35218 in the CISA KEV catalog?

No. CVE-2021-35218 is not currently on the CISA Known Exploited Vulnerabilities list.

What is the CVSS severity of CVE-2021-35218?

CVE-2021-35218 has a CVSS v3 base score of 8.9 (HIGH).

What is the EPSS score for CVE-2021-35218?

CVE-2021-35218 has an EPSS score of 76.41% (99th percentile), estimating the probability of exploitation in the next 30 days.

How do I fix CVE-2021-35218?

Upgrade orion platform to 2020.2.6 or later.

CVE & CISA-KEV Catalog

CVE-2021-35218

HIGHEPSS 99th pctl

8.9

CVSS v3

NVD

Description

Deserialization of Untrusted Data in the Web Console Chart Endpoint can lead to remote code execution. An unauthorized attacker who has network access to the Orion Patch Manager Web Console could potentially exploit this and compromise the server

CWE-502Deserialization of Untrusted Data

How to fix

Remediation Available

orion platformNVD

Affected:< 2020.2.6Fixed in:2020.2.6CVE-2021-35218derived from NVD

TridentStack Control can deploy fixes like this automatically across your Windows, macOS, and Linux fleet. See how it works

Remediation is compiled from vendor and distribution security advisories. Always confirm against the linked source for your exact version and platform.

CVSS v3 Vector

Exploitability

Attack VectorAdjacent

Attack ComplexityLow

Privileges RequiredLow

User InteractionNone

ScopeChanged

Impact

ConfidentialityHigh

IntegrityHigh

AvailabilityLow

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

Exploit Intelligence

76.41%probability of exploitation in 30 days

99thpercentile

Very high risk: more likely to be exploited than 99% of all known CVEs.

References

Vendor Advisory2

Third-Party Advisory1

zerodayinitiative.com

Related Vulnerabilities

Other CWE-502 (Deserialization of Untrusted Data) vulnerabilities, ordered by exploit likelihood. View all

CVE	Severity	CVSS	EPSS	Exploited	Fix
CVE-2023-0669	High	7.2	100%	KEV + Ransom	Fix
CVE-2021-44228	Critical	10.0	100%	KEV + Ransom	Fix
CVE-2021-35464	Critical	9.8	100%	KEV + Ransom	Fix
CVE-2023-29300	Critical	9.8	100%	KEV + Ransom	-
CVE-2025-53770	Critical	9.8	100%	KEV + Ransom	Fix
CVE-2022-41082	High	8.0	100%	KEV + Ransom	Fix

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This product uses NVD data but is not endorsed or certified by the NVD. EPSS scores courtesy of FIRST.org (https://www.first.org/epss). Source: CISA KEV Catalog. Data as of 2024-11-21.