Medium [CVE-2026-20198] Cisco Integrated Management Controller Cross-Site Scripting Vulnerability
This medium-severity Cisco advisory covers CVE-2026-20198 affecting Unified Computing System (Standalone), Unified Computing System E-Series Software (UCSE), Enterprise NFV Infrastructure Software.
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Summary
A vulnerability in the web-based management interface of Cisco Integrated Management Controller (IMC) could allow an authenticated, remote attacker to conduct a cross-site scripting (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.
Cisco has released software updates that address this vulnerability. There are no workarounds that address this vulnerability.
Affected products named by the advisory: Unified Computing System (Standalone); Unified Computing System E-Series Software (UCSE); Enterprise NFV Infrastructure Software.
- Scope: At the time of publication, this vulnerability affected the following Cisco products if they were running a vulnerable release of Cisco IMC, regardless of device configuration:
- Earlier than 4.12 — Migrate to a fixed release
- Release 4.12 (first fixed: 4.12.8)
- 4.13 — Migrate to a fixed release
- 4.14 — Migrate to a fixed release
- Release 4.15 (first fixed: 4.15.6)
- 4.16 — Migrate to a fixed release
- Release 4.18 (first fixed: 4.18.5 (Sep 2026))
- Release 26.1 (first fixed: 26.1.2)
- Earlier than 4.2 — Migrate to a fixed release
- Release 4.2 (first fixed: 4.2(3r))
- Release 4.3 (first fixed: 4.3(2.260020))
- Release 4.3 (first fixed: 4.3(6.260054))
- Release 6.0 (first fixed: 6.0(2.260143)1)
- Release 3.2 and earlier (first fixed: 3.2.18.1)
- Release 4.15 and earlier (first fixed: 4.15.4)
- Earlier than 4.3 — Migrate to a fixed release
Official advisory · high-confidence parse· fetched 2 hours ago·verify at source
- 4.12.8
- 4.15.6
- 4.18.5 (Sep 2026)
- 26.1.2
- 4.2(3r)
- 4.3(2.260020)
- 4.3(6.260054)
- 6.0(2.260143)1
- 3.2.18.1
- 4.15.4
Official advisory · high-confidence parse· fetched 2 hours ago·verify at source
Mitigation checklist
- Upgrade to the first fixed release for your train per the Fixed Releases table in this advisory.
- Earlier than 4.12: migrate to a fixed release.
- Release 4.12: upgrade to 4.12.8.
- Release 4.13: migrate to a fixed release.
- Release 4.14: migrate to a fixed release.
- Release 4.15: upgrade to 4.15.6.
- Release 4.12: upgrade to 4.12.8.
- Release 4.13: migrate to a fixed release.
- Release 4.14: migrate to a fixed release.
- There are no workarounds that address this vulnerability.
Official advisory · high-confidence parse· fetched 2 hours ago·verify at source
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