Medium4.8Cisco

Medium [CVE-2026-20112] Cisco IOx Application Hosting Environment Stored Cross-Site Scripting Vulnerability

This medium-severity Cisco advisory covers CVE-2026-20112 affecting Cisco IOS XE Software 16.6.1, Cisco IOS XE Software 16.6.2, Cisco IOS XE Software 16.6.3.

cisco-sa-iox-xss-LpGkzwtJ Published Mar 25, 2026Updated by vendor Mar 25, 2026

CVE-2026-20112

Affected products & platforms

CiscoIOS XE

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Summary

A vulnerability in the web-based Cisco IOx application hosting environment management interface of Cisco IOS XE Software could allow an authenticated, remote attacker to conduct a stored cross-site scripting (XSS) attack against a user of the web-based management interface of an affected device.

This vulnerability is due to insufficient validation of user-supplied input. An attacker could exploit this vulnerability by injecting malicious code into specific pages of the interface.

A successful exploit could allow the attacker to execute arbitrary script code in the context of the affected in…

Affected products named by the advisory: Cisco IOS XE Software 16.6.1; Cisco IOS XE Software 16.6.2; Cisco IOS XE Software 16.6.3; Cisco IOS XE Software 16.6.4s; and 2 more.

Affected versions

Scope: At the time of publication, this vulnerability affected Cisco devices if they were running a vulnerable release of Cisco IOS XE Software that was configured for the Cisco IOx application hosting environment. The Cisco IOx application hosting environment is not configured by default.

Official advisory · high-confidence parse· fetched 2 months ago·verify at source

Fixed versions

No fixed release is recorded yet. That does not prove no patch exists — confirm against the vendor advisory.

Official advisory · high-confidence parse· fetched 2 months ago·verify at source

Mitigation checklist

Workaround status

There are no workarounds that address this vulnerability.

Official advisory · high-confidence parse· fetched 2 months ago·verify at source

Sources

Official and corroborating records used to build this advisory.

Cisco Security Advisories (PSIRT)official
Official vendor feed — the source of truth for this advisory. VulniPulse polled this feed and parsed this entry from it. Discovered from the machine-readable feed https://sec.cloudapps.cisco.com/security/center/psirtrss20/CiscoSecurityAdvisory.xml; this link opens the Cisco advisory index instead of the raw feed document.
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Vendor advisory pageofficial
Advisory page fetched and parsed to extract affected/fixed versions and mitigation guidance beyond what the feed carries.
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Cross-references

Validate CVE metadata against the authoritative registries.

CVE-2026-20112NVD CVE.org MITRE

Official resources

Cisco Software Checker
Official documentation
Official tool to confirm whether your exact IOS / IOS XE / NX-OS / ASA / FTD / SD-WAN release is affected and to find the first fixed release.

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