Pivotal CRM CVE-2026-39253
HIGHSeverity by source
AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H
Network-reachable unauthenticated deserialization (AV:N/PR:N/UI:N) yielding full RCE (C/I/A:H); AC:H reflects need for a working .NET gadget chain against the specific endpoint.
Primary rating from Vendor (mitre).
CVSS VectorVendor: mitre
CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H
Lifecycle Timeline
3DescriptionCVE.org
An issue in Pivotal CRM v.6.6.04.08 allows a remote attacker to execute arbitrary code via the Pivotal.Core.Common.dll and Pivotal.Engine.Client.Services.Conversion.dll components.
AnalysisAI
Remote code execution in Pivotal CRM 6.6.04.08 Smart Client arises from insecure deserialization in the Pivotal.Core.Common.dll and Pivotal.Engine.Client.Services.Conversion.dll components, allowing remote attackers to execute arbitrary code on affected installations. The vendor (Aurea/Pivotal) has published a remediation advisory and a researcher has released a public technical advisory, but the issue is not currently listed in CISA KEV and SSVC indicates no observed exploitation. …
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Attack ChainAIDerived
Hypothetical attack flow derived from CVE metadata
Vulnerability AssessmentAI
| Exploitation | Exploitation requires network reachability to a Pivotal CRM 6.6.04.08 Smart Client endpoint that routes input through the vulnerable Pivotal.Core.Common.dll or Pivotal.Engine.Client.Services.Conversion.dll deserialization paths; per CVSS PR:N/UI:N no prior authentication or user interaction is needed. … Additional conditions and limiting factors are described in the full assessment. |
| Risk Assessment | Signals are mixed and lean toward moderate, targeted risk rather than widespread imminent exploitation. … Full risk analysis with EPSS, KEV, and SSVC signal comparison available after sign-in. |
| Exploit Scenario | An attacker with network access to a Pivotal CRM 6.6.04.08 Smart Client endpoint sends a crafted request containing a malicious .NET serialized payload that is processed by Pivotal.Engine.Client.Services.Conversion.dll, triggering execution of a gadget chain during deserialization and yielding arbitrary code execution under the service account. From that foothold the attacker pivots into the CRM database to exfiltrate customer records or moves laterally into the corporate domain. … |
| Remediation | Apply the remediation described in the vendor advisory at https://support.pivotal.aurea.com/article/129552-remediating-insecure-deserialization-cwe-502-in-pivotal-6-6-04-08-smart-client-pbs, which addresses the insecure deserialization in the two affected assemblies; the input data does not include an exact replacement build number, so this maps to 'Patch available per vendor advisory' and customers should confirm the precise fixed assembly versions with Aurea support. … Detailed patch versions, workarounds, and compensating controls in full report. |
Recommended ActionAI
Within 24 hours: Identify all Pivotal CRM 6.6.04.08 Smart Client instances in production and development environments; retrieve and review Aurea's published remediation advisory. …
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Same weakness CWE-502 – Deserialization of Untrusted Data
View allSame technique Deserialization
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External POC / Exploit Code
Leaving vuln.today