CVE-2026-20090 Cisco Integrated Management Controller Cross-Site Scripting Vulnerability
Authenticated administrators can inject scripts into Cisco IMC, allowing attackers to execute code or steal data from other users.
- Exploited in the wild
- Not known
- Login needed
- An administrator
- Attackable
- Over the internet
- Victim action needed
- A user has to click or open something
- Fix
- None listed
What is CVE-2026-20090?
CVE-2026-20090 is a medium-severity cross-site scripting vulnerability in Cisco Unified Computing System, published on 1 Apr 2026. An attacker needs administrator access to exploit it, and only if a user opens a file or follows a link.
Official description
A vulnerability in the web-based management interface of Cisco IMC could allow an authenticated, remote attacker with administrative privileges to conduct a stored XSS attack against a user of the interface. This vulnerability is due to insufficient validation of user input. An attacker could exploit this vulnerability by persuading a user of an affected interface to click a crafted link. A successful exploit could allow the attacker to execute arbitrary script code in the browser of the targeted user or access sensitive, browser-based information.
Weakness: CWE-79
Which versions are affected by CVE-2026-20090?
It affects 3 products.
Products include Cisco Enterprise Nfv Infrastructure Software, Cisco Unified Computing System, Cisco Unified Computing System E-Series Software.
How do I fix CVE-2026-20090?
No fix has been published for CVE-2026-20090 yet. Limit exposure of the affected software until one is available.
Escape output for the context it lands in and set a strict Content Security Policy. Upgrading the affected component is the real fix. More about Cross-site scripting.
Is CVE-2026-20090 being exploited?
There is no known exploitation of CVE-2026-20090 in the wild and no public exploit code.
Other vulnerabilities in Cisco Unified Computing System
- CVE-2022-20777 Cisco Enterprise NFV Infrastructure Software Vulnerabilities
- CVE-2022-20779 Cisco Enterprise NFV Infrastructure Software Vulnerabilities
- CVE-2022-20780 Cisco Enterprise NFV Infrastructure Software Vulnerabilities
- CVE-2021-34746 Cisco Enterprise NFV Infrastructure Software Authentication Bypass Vulnerability
- CVE-2020-3470 Cisco Integrated Management Controller Multiple Remote Code Execution Vulnerabilities
Sources
Also known as GHSA-37g6-52v8-pjqr.