High severity · published Aug 11, 2026
CVE-2026-21273
ColdFusion | Improper Input Validation (CWE-20)
8.7
CVSS
0.9%
EPSS
No
On KEV
Description
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.
CVSS vector
CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:H/I:H/A:N
Attack vector
Network
Complexity
Low
Privileges
Low
User interaction
Required
Confidentiality
High
Integrity
High
Availability
None
Scope
Changed
Exploitation
Is it being used?
Exploit prediction (EPSS)0.9% · higher than 58% of CVEs
Exploited in the wildNo evidence yet
CISA KEVNot listed
Ransomware campaign useNot known
Affected products
Which versions
CO
ColdFusion · Adobe
2023; 2023; 2023; 2023; 2023; 2023; +29 more · source: NVD
C2
ColdFusion 2023 · Adobe
through 2023.0.22 · source: vendor
C2
ColdFusion 2025 · Adobe
through 2025.0.11 · source: vendor
References
NVD
https://nvd.nist.gov/vuln/detail/CVE-2026-21273
CVE.org
https://www.cve.org/CVERecord?id=CVE-2026-21273
Vendor Advisory
https://helpx.adobe.com/security/products/coldfusion/apsb26-90.html
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