Adobe · ColdFusion

CVE-2018-4939

Adobe ColdFusion Deserialization of Untrusted Data Vulnerability

Exploited in attacks Critical 9.8 Attack chance: 62%

What it is

Adobe ColdFusion Update 5 and earlier versions, ColdFusion 11 Update 13 and earlier versions have an exploitable Deserialization of Untrusted Data vulnerability. Successful exploitation could lead to arbitrary code execution.

CISA: Adobe ColdFusion contains a deserialization of untrusted data vulnerability that could allow for code execution.

What to do

Apply updates per vendor instructions.

Deadline for US federal agencies: May 3, 2022

Added to the CISA list: November 3, 2021
Published: May 19, 2018
Severity: Critical 9.8 CVSS 3.1
Chance of attacks in the next 30 days (EPSS): 62% in the top 0.8% of all known vulnerabilities
Weakness: CWE-502
More details: NVD · CVE.org · CISA

All references (2)

More exploited flaws from Adobe

Added	Vulnerability	Product	Severity	Attack chance
Jul 7, 2026	Path TraversalCVE-2026-48282	ColdFusion	Critical 10.0	42%
Feb 24, 2025	DeserializationCVE-2017-3066	ColdFusion	Critical 9.8	91%
Dec 16, 2024	Improper Access ControlCVE-2024-20767	ColdFusion	High 7.4	99%
Jan 8, 2024	Deserialization of Untrusted DataCVE-2023-29300used by ransomware	ColdFusion	Critical 9.8	>99.9%
Jan 8, 2024	Deserialization of Untrusted DataCVE-2023-38203used by ransomware	ColdFusion	Critical 9.8	97%
Aug 21, 2023	Deserialization of Untrusted DataCVE-2023-26359	ColdFusion	Critical 9.8	17%
Jul 20, 2023	Improper Access ControlCVE-2023-29298	ColdFusion	High 7.5	99.8%
Jul 20, 2023	Improper Access ControlCVE-2023-38205	ColdFusion	High 7.5	99.8%

All of them →

Sources: Known Exploited Vulnerabilities (CISA, public domain), CVE records (cve.org) and EPSS (FIRST). The chance of attacks is the EPSS estimate that someone will try to exploit the flaw in the next 30 days.