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CVE-2021-27017

Deserialization of untrusted data

MEDIUM
6.6
CVSS Score
Published: February 7, 2025 at 07:28 PM UTC
Updated: June 17, 2026 at 03:44 AM UTC
1 product affected across 1 vendorPuppet Agent

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Severity
MEDIUM6.6
Exploit prediction
EPSS 0.6%
SSVC
No known exploit

Description

Utilization of a module presented a security risk by allowing the deserialization of untrusted/user supplied data. This is resolved in the Puppet Agent 7.4.0 release.

Affected

Our own answer: ranges merged, affected separated from platform-only, with confidence and review flags.

Puppet Agent· Puppetpu
60%
0.0.0 ≤ v < 7.4.00.0.0
Affected range stops below 7.4.0, so it looks safe — our inference, not a vendor statement

Remediation

No guide yet

No remediation guidance has been written for this CVE yet, and no fixed version or vendor advisory is recorded against it.

References (1)

Source: [email protected]
https://www.puppet.com/security/cve/cve-2021-27017-deserialization-untrusted-data

SSVC — Action Prioritization

SSVCNo known exploitNot automatableTotal impact

SSVC signals action urgency (what to patch first), separate from CVSS which measures severity.

CVSS

6.6MEDIUMPerforce
Attack Vector
NETWORK
Complexity
HIGH
Privileges
HIGH
User Interaction
NONE
Scope
UNCHANGED
Confidentiality
HIGH
Integrity
HIGH
Availability
HIGH
Vector?

Quick Info

StatusDEFERRED
CWE
CWE-502

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