Vulnerability record · CVE-2012-4603 · published 10 January 2020

CVE-2012-4603: Citrix receiver improper input validation vulnerability

Citrix · Receiver

Citrix XenApp Online Plug-in for Windows 12.1 and earlier, and Citrix Receiver for Windows 3.2 and earlier could allow remote attackers to execute arbitrary code by convincing a target to open a specially crafted file from an SMB or WebDAV fileserver.

7.8 CVSS 3.1 High EPSS 6.9% · top 6.1% CWE-20 · Improper input validation

7.8CVSS 3.1 base score, v2 9.3

6.9%EPSS exploitation probability, 30 days

NoNot in CISA KEV

2Affected product versions listed by NVD

8References

16 Jun 2026Last modified by NVD

Description

CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H

Affected products

2 vulnerable configurations from NVD's CPE data, grouped by vendor and product.

Receiver Citrix

Xenapp Online Citrix

References

Link	Tags
http://www.securityfocus.com/bid/55518	Third Party AdvisoryVDB Entry
http://www.securitytracker.com/id?1027521	Third Party AdvisoryVDB Entry
http://www.securitytracker.com/id?1027522	Third Party AdvisoryVDB Entry
https://exchange.xforce.ibmcloud.com/vulnerabilities/78433	Third Party AdvisoryVDB Entry
http://www.securityfocus.com/bid/55518	Third Party AdvisoryVDB Entry
http://www.securitytracker.com/id?1027521	Third Party AdvisoryVDB Entry
http://www.securitytracker.com/id?1027522	Third Party AdvisoryVDB Entry
https://exchange.xforce.ibmcloud.com/vulnerabilities/78433	Third Party AdvisoryVDB Entry

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Related vulnerabilities

Same products first, then exploited flaws of the same weakness class.

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Source: NIST National Vulnerability Database (record CVE-2012-4603), CISA KEV, FIRST EPSS (scores of 2026-09-26). This page is refreshed as NVD updates the record.