Medium severity · published Mar 10, 2026
CVE-2026-3862
Cross-Site Scripting Vulnerability in SiteMinder Administrative UI
4.8
CVSS
0.2%
EPSS
No
On KEV
Description
Cross-site Scripting (XSS) allows an attacker to submit specially crafted data to the application which is returned unaltered in the resulting web page.
CVSS vector
CVSS:3.1/AV:N/AC:L/PR:H/UI:R/S:C/C:L/I:L/A:N
Attack vector
Network
Complexity
Low
Privileges
High
User interaction
Required
Confidentiality
Low
Integrity
Low
Availability
None
Scope
Changed
Exploitation
Is it being used?
Exploit prediction (EPSS)0.2% · higher than 10% of CVEs
Exploited in the wildNo evidence yet
CISA KEVNot listed
Ransomware campaign useNot known
Affected products
Which versions
SI
SiteMinder · Broadcom
12.9; 12.8.x · source: vendor
SS
Symantec Siteminder · Broadcom
12.8 through 12.8.08; 12.9 · source: NVD
References
NVD
https://nvd.nist.gov/vuln/detail/CVE-2026-3862
CVE.org
https://www.cve.org/CVERecord?id=CVE-2026-3862
Permissions Required
https://support.broadcom.com/web/ecx/support-content-notification/-/external/content/SecurityAdvisories/0/37176
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