CVE-2026-21273
ColdFusion | Improper Input Validation (CWE-20)
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.
INFO
Published Date :
Aug. 11, 2026, 5:17 p.m.
Last Modified :
Aug. 13, 2026, 5:49 p.m.
Remotely Exploit :
Yes !
Source :
[email protected]
CVSS Scores
| Score | Version | Severity | Vector | Exploitability Score | Impact Score | Source |
|---|---|---|---|---|---|---|
| CVSS | 134c704f-9b21-4f2e-91b3-4a467353bcc0 | |||||
| CVSS 3.1 | HIGH | 078d4453-3bcd-4900-85e6-15281da43538 | ||||
| CVSS 3.1 | HIGH | [email protected] | ||||
| CVSS 3.1 | HIGH | MITRE-CVE | ||||
| CVSS 3.1 | HIGH | [email protected] |
Solution
- Validate all user inputs rigorously.
- Implement strict access controls.
- Enforce least privilege principles.
- Update relevant software components.
References to Advisories, Solutions, and Tools
Here, you will find a curated list of external links that provide in-depth
information, practical solutions, and valuable tools related to
CVE-2026-21273.
| URL | Resource |
|---|---|
| https://helpx.adobe.com/security/products/coldfusion/apsb26-90.html | Vendor Advisory |
CWE - Common Weakness Enumeration
While CVE identifies
specific instances of vulnerabilities, CWE categorizes the common flaws or
weaknesses that can lead to vulnerabilities. CVE-2026-21273 is
associated with the following CWEs:
Common Attack Pattern Enumeration and Classification (CAPEC)
Common Attack Pattern Enumeration and Classification
(CAPEC)
stores attack patterns, which are descriptions of the common attributes and
approaches employed by adversaries to exploit the CVE-2026-21273
weaknesses.
We scan GitHub repositories to detect new proof-of-concept exploits. Following list is a collection of public exploits and proof-of-concepts, which have been published on GitHub (sorted by the most recently updated).
Results are limited to the first 15 repositories due to potential performance issues.
The following list is the news that have been mention
CVE-2026-21273 vulnerability anywhere in the article.
The following table lists the changes that have been made to the
CVE-2026-21273 vulnerability over time.
Vulnerability history details can be useful for understanding the evolution of a vulnerability, and for identifying the most recent changes that may impact the vulnerability's severity, exploitability, or other characteristics.
-
Initial Analysis by [email protected]
Aug. 13, 2026
Action Type Old Value New Value Added CVSS V3.1 AV:N/AC:L/PR:L/UI:R/S:C/C:H/I:H/A:N Added CPE Configuration OR *cpe:2.3:a:adobe:coldfusion:2023:update1:*:*:*:*:*:* *cpe:2.3:a:adobe:coldfusion:2023:-:*:*:*:*:*:* *cpe:2.3:a:adobe:coldfusion:2023:update2:*:*:*:*:*:* *cpe:2.3:a:adobe:coldfusion:2023:update3:*:*:*:*:*:* *cpe:2.3:a:adobe:coldfusion:2023:update4:*:*:*:*:*:* *cpe:2.3:a:adobe:coldfusion:2023:update5:*:*:*:*:*:* *cpe:2.3:a:adobe:coldfusion:2023:update7:*:*:*:*:*:* *cpe:2.3:a:adobe:coldfusion:2023:update6:*:*:*:*:*:* *cpe:2.3:a:adobe:coldfusion:2023:update8:*:*:*:*:*:* *cpe:2.3:a:adobe:coldfusion:2023:update9:*:*:*:*:*:* *cpe:2.3:a:adobe:coldfusion:2023:update11:*:*:*:*:*:* *cpe:2.3:a:adobe:coldfusion:2023:update10:*:*:*:*:*:* *cpe:2.3:a:adobe:coldfusion:2023:update12:*:*:*:*:*:* *cpe:2.3:a:adobe:coldfusion:2025:-:*:*:*:*:*:* *cpe:2.3:a:adobe:coldfusion:2023:update13:*:*:*:*:*:* *cpe:2.3:a:adobe:coldfusion:2025:update1:*:*:*:*:*:* *cpe:2.3:a:adobe:coldfusion:2023:update14:*:*:*:*:*:* *cpe:2.3:a:adobe:coldfusion:2025:update2:*:*:*:*:*:* *cpe:2.3:a:adobe:coldfusion:2023:update15:*:*:*:*:*:* *cpe:2.3:a:adobe:coldfusion:2025:update3:*:*:*:*:*:* *cpe:2.3:a:adobe:coldfusion:2023:update16:*:*:*:*:*:* *cpe:2.3:a:adobe:coldfusion:2025:update4:*:*:*:*:*:* *cpe:2.3:a:adobe:coldfusion:2025:update5:*:*:*:*:*:* *cpe:2.3:a:adobe:coldfusion:2023:update18:*:*:*:*:*:* *cpe:2.3:a:adobe:coldfusion:2025:update6:*:*:*:*:*:* *cpe:2.3:a:adobe:coldfusion:2023:update17:*:*:*:*:*:* *cpe:2.3:a:adobe:coldfusion:2023:update19:*:*:*:*:*:* *cpe:2.3:a:adobe:coldfusion:2025:update7:*:*:*:*:*:* *cpe:2.3:a:adobe:coldfusion:2025:update8:*:*:*:*:*:* *cpe:2.3:a:adobe:coldfusion:2023:update20:*:*:*:*:*:* *cpe:2.3:a:adobe:coldfusion:2025:update9:*:*:*:*:*:* *cpe:2.3:a:adobe:coldfusion:2023:update21:*:*:*:*:*:* *cpe:2.3:a:adobe:coldfusion:2025:update10:*:*:*:*:*:* *cpe:2.3:a:adobe:coldfusion:2023:update22:*:*:*:*:*:* *cpe:2.3:a:adobe:coldfusion:2025:update11:*:*:*:*:*:* Added Reference Type Adobe Systems Incorporated: https://helpx.adobe.com/security/products/coldfusion/apsb26-90.html Types: Vendor Advisory -
CVE Modified by 134c704f-9b21-4f2e-91b3-4a467353bcc0
Aug. 12, 2026
Action Type Old Value New Value Added SSVC {'id': 'CVE-2026-21273', 'role': 'CISA Coordinator', 'options': [{'exploitation': 'none'}, {'automatable': 'no'}, {'technicalImpact': 'total'}], 'version': '2.0.3', 'timestamp': '2026-08-12T14:58:24.290218Z'} -
CVE Modified by [email protected]
Aug. 11, 2026
Action Type Old Value New Value Changed Affected [{'vendor': 'Adobe', 'product': 'ColdFusion 2025', 'versions': [{'status': 'affected', 'version': '0', 'versionType': 'custom', 'lessThanOrEqual': '2025.0.11'}, {'status': 'unaffected', 'version': '2025.0.12', 'versionType': 'custom'}], 'defaultStatus': 'unaffected'}, {'vendor': 'Adobe', 'product': 'ColdFusion 2023', 'versions': [{'status': 'affected', 'version': '0', 'versionType': 'custom', 'lessThanOrEqual': '2023.0.22'}, {'status': 'unaffected', 'version': '2023.0.23', 'versionType': 'custom'}], 'defaultStatus': 'unaffected'}] [{'vendor': 'Adobe', 'product': 'ColdFusion 2025', 'versions': [{'status': 'affected', 'version': '0', 'versionType': 'custom', 'lessThanOrEqual': '2025.0.11'}, {'status': 'unaffected', 'version': '2025.0.12', 'versionType': 'custom'}], 'defaultStatus': 'affected'}, {'vendor': 'Adobe', 'product': 'ColdFusion 2023', 'versions': [{'status': 'affected', 'version': '0', 'versionType': 'custom', 'lessThanOrEqual': '2023.0.22'}, {'status': 'unaffected', 'version': '2023.0.23', 'versionType': 'custom'}], 'defaultStatus': 'affected'}] -
New CVE Received by [email protected]
Aug. 11, 2026
Action Type Old Value New Value Added Affected [{'vendor': 'Adobe', 'product': 'ColdFusion 2025', 'versions': [{'status': 'affected', 'version': '0', 'versionType': 'custom', 'lessThanOrEqual': '2025.0.11'}, {'status': 'unaffected', 'version': '2025.0.12', 'versionType': 'custom'}], 'defaultStatus': 'unaffected'}, {'vendor': 'Adobe', 'product': 'ColdFusion 2023', 'versions': [{'status': 'affected', 'version': '0', 'versionType': 'custom', 'lessThanOrEqual': '2023.0.22'}, {'status': 'unaffected', 'version': '2023.0.23', 'versionType': 'custom'}], 'defaultStatus': 'unaffected'}] Added 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. Added CVSS V3.1 AV:N/AC:L/PR:L/UI:R/S:C/C:H/I:H/A:N Added CWE CWE-20 Added Reference https://helpx.adobe.com/security/products/coldfusion/apsb26-90.html