CVE-2026-121578
CVE-2026-121578
Description
Tactical RMM contains a stored XSS vulnerability caused by improperly validated input or encode output for various fields, enabling HTML/JavaScript to be stored in the tools database, which is then executed in the browsers of users when they view content containing the infected objects, leading to account takeover or code execution.
INFO
Published Date :
Nov. 3, 2026, 4:17 p.m.
Last Modified :
Nov. 3, 2026, 6:17 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 | MEDIUM | 134c704f-9b21-4f2e-91b3-4a467353bcc0 |
Solution
- Implement robust input validation for all fields.
- Ensure proper output encoding is applied.
- Update Tactical RMM to the latest version.
- Review and sanitize all user-supplied data.
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-2026-121578.
CWE - Common Weakness Enumeration
While CVE identifies
specific instances of vulnerabilities, CWE categorizes the common flaws or
weaknesses that can lead to vulnerabilities. CVE-2026-121578 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-2026-121578
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-2026-121578 vulnerability anywhere in the article.
The following table lists the changes that have been made to the
CVE-2026-121578 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.
-
CVE Modified by 134c704f-9b21-4f2e-91b3-4a467353bcc0
Nov. 03, 2026
Action Type Old Value New Value Added CVSS V3.1 AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N Added CWE CWE-79 Added Reference https://github.com/Kuri119/Stored-XSS-In-Tactical-RMM-1.5.2/tree/main Added SSVC {'id': 'CVE-2026-121578', 'role': 'CISA Coordinator', 'options': [{'exploitation': 'poc'}, {'automatable': 'no'}, {'technicalImpact': 'partial'}], 'version': '2.0.3', 'timestamp': '2026-11-03T17:53:51.173379Z'} -
New CVE Received by [email protected]
Nov. 03, 2026
Action Type Old Value New Value Added Description Tactical RMM contains a stored XSS vulnerability caused by improperly validated input or encode output for various fields, enabling HTML/JavaScript to be stored in the tools database, which is then executed in the browsers of users when they view content containing the infected objects, leading to account takeover or code execution. Added Affected New affected value received. <a href="https://github.com/CVEProject/cvelistV5/blob/main/cves/2026/121xxx/CVE-2026-121578.json">CVE-2026-121578</a> Added Reference https://github.com/amidaware/tacticalrmm-web/commit/ba5363ea99cf776511e5c828b6d744e4d0bddd08 Added Reference https://github.com/Kuri119/Stored-XSS-In-Tactical-RMM-1.5.2/tree/main