CVE-2026-21273 is a vulnerability in Adobe ColdFusion
Published on August 11, 2026
ColdFusion | Improper Input Validation (CWE-20)
is affected by an Improper Input Validation vulnerability that could result in privilege escalation. A low-privileged attacker could exploit this vulnerability to gain unauthorized read and write access. Exploitation of this issue requires user interaction in that a victim must open a malicious file. Scope is changed.
Vulnerability Analysis
CVE-2026-21273 can be exploited with network access, requires user interaction and a small amount of user privileges. This vulnerability is considered to have a low attack complexity. The potential impact of an exploit of this vulnerability is considered to have a high impact on confidentiality and integrity, and no impact on availability.
Weakness Type
Improper Input Validation
The product receives input or data, but it does not validate or incorrectly validates that the input has the properties that are required to process the data safely and correctly.
Products Associated with CVE-2026-21273
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Affected Versions
Adobe ColdFusion 2025:- Before and including 2025.0.11 is affected.
- Version 2025.0.12 is unaffected.
- Before and including 2023.0.22 is affected.
- Version 2023.0.23 is unaffected.