CVE-2026-39253 Deserialization in n/a
Remote attackers can execute arbitrary code in Pivotal CRM via unsafe deserialization in core DLL components.
- Exploited in the wild
- Not known
- Login needed
- Not needed
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- None listed
What is CVE-2026-39253?
CVE-2026-39253 is a high-severity unsafe deserialization vulnerability in n/a, published on 23 Jun 2026. An attacker can exploit it over the internet without logging in, with no action from the victim.
Official description
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.
Weakness: CWE-502
Which versions are affected by CVE-2026-39253?
How do I fix CVE-2026-39253?
No fix has been published for CVE-2026-39253 yet. Limit exposure of the affected software until one is available.
Upgrade, and only deserialise data from trusted sources or with an allow-list of types. More about Unsafe deserialization.
Is CVE-2026-39253 being exploited?
There is no known exploitation of CVE-2026-39253 in the wild and no public exploit code.
Public exploit code: 1 proofs of concept on GitHub.
Sources
Also known as GHSA-78fj-q294-w4gw.