CVE-2026-21273 ColdFusion | Improper Input Validation (CWE-20)
A low-privileged attacker can gain unauthorized read and write access by tricking a victim into opening a malicious file in Adobe ColdFusion.
- Exploited in the wild
- Not known
- Login needed
- Any signed-in user
- Attackable
- Over the internet
- Victim action needed
- A user has to click or open something
- Fix
- None listed
What is CVE-2026-21273?
CVE-2026-21273 is a high-severity vulnerability in Adobe Coldfusion, published on 11 Aug 2026. Any signed-in user can exploit it over the network, and only if a user opens a file or follows a link.
Official 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.
Weakness: CWE-20
Which versions are affected by CVE-2026-21273?
It affects 1 product.
Products include Adobe Coldfusion.
How do I fix CVE-2026-21273?
No fix has been published for CVE-2026-21273 yet. Limit exposure of the affected software until one is available.
Is CVE-2026-21273 being exploited?
There is no known exploitation of CVE-2026-21273 in the wild and no public exploit code.
Other vulnerabilities in Adobe Coldfusion
- CVE-2026-48282 Adobe ColdFusion Path Traversal
- CVE-2023-38203 Adobe ColdFusion Deserialization of Untrusted Data
- CVE-2023-29300 Adobe ColdFusion Deserialization of Untrusted Data
- CVE-2023-26359 Adobe ColdFusion Deserialization of Untrusted Data
- CVE-2018-15961 Adobe ColdFusion Unrestricted File Upload
Sources
Also known as GHSA-m757-qg2g-x6hm.