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CVE-2025-5777 Details

Description

Insufficient input validation leading to memory overread when the NetScaler is configured as a Gateway (VPN virtual server, ICA Proxy, CVPN, RDP Proxy) OR AAA virtual server

Metrics

CVSS 3.x Severity and Vector Strings:

NIST: [email protected]CVSS-B:7.5 HIGHVector:CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N

References to Advisories, Solutions, and Tools

By selecting these links, you will be leaving this site. These are references gathered from the official CVE record and are not endorsed by Volerion.

URL	Source(s)	Tag(s)
https://doublepulsar.com/citrixbleed-2-exploitation-started-mid-june-how-to-spot-it-f3106392aa71	CISA-ADP	Third Party Advisory
https://reliaquest.com/blog/threat-spotlight-citrix-bleed-2-vulnerability-in-netscaler-adc-gateway-devices/	CISA-ADP	Third Party Advisory
https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2025-5777	CISA-ADP	US Government Resource
https://citrixbleed.com	CVE	Broken LinkThird Party Advisory
https://horizon3.ai/attack-research/attack-blogs/cve-2025-5777-citrixbleed-2-write-up-maybe/	CVE	Third Party Advisory
https://labs.watchtowr.com/how-much-more-must-we-bleed-citrix-netscaler-memory-disclosure-citrixbleed-2-cve-2025-5777/	CVE	Third Party Advisory
https://www.bleepingcomputer.com/news/security/cisa-tags-citrix-bleed-2-as-exploited-gives-agencies-a-day-to-patch/	CVE	Press/Media CoverageThird Party Advisory
https://www.netscaler.com/blog/news/netscaler-critical-security-updates-for-cve-2025-6543-and-cve-2025-5777/	CVE	Third Party Advisory
https://www.theregister.com/2025/07/10/cisa_citrixbleed_kev/	CVE	Press/Media Coverage
https://support.citrix.com/support-home/kbsearch/article?articleNumber=CTX693420	[email protected]	Vendor Advisory

see all 10 references

This CVE is in CISA's Known Exploited Vulnerabilities Catalog

Reference CISA's BOD 22-01 and Known Exploited Vulnerabilities Catalog for further guidance and requirements.

Vulnerability Name	Date Added	Due Date	Required Action
Citrix NetScaler ADC and Gateway Out-of-Bounds Read Vulnerability	Jul 10, 2025	Jul 11, 2025	Apply mitigations per vendor instructions, follow applicable BOD 22-01 guidance for cloud services, or discontinue use of the product if mitigations are unavailable.

Weakness Enumeration

CWE-ID	CWE Name	Source
CWE-908	Use of Uninitialized Resource	[email protected]
CWE-125	Out-of-bounds Read	[email protected]
CWE-457	Use of Uninitialized Variable	CISA-ADP

Affected Products

Product	Versions
citrix netscaler application delivery controller	>= 12.1, < 12.1-55.328 >= 13.1, < 13.1-37.235 >= 13.1, < 13.1-58.32 >= 14.1, < 14.1-43.56
CPE cpe:2.3:a:citrix:netscaler_application_delivery_controller:::::fips:::* cpe:2.3:a:citrix:netscaler_application_delivery_controller:::::ndcpp:::* cpe:2.3:a:citrix:netscaler_application_delivery_controller:::::-:::* Remediation No remediation found in references.
citrix netscaler gateway	>= 13.1, < 13.1-58.32 >= 14.1, < 14.1-43.56
CPE cpe:2.3:a:citrix:netscaler_gateway:::::::: Remediation No remediation found in references.

Change History

17 change records found show changes

Date	Action	Recorded By
Aug 4, 2026	CVE Modified	CISA-ADP
Jun 17, 2026	CVE Modified	[email protected]
Jun 17, 2026	CVE Modified	CISA-ADP
Oct 30, 2025	Modified Analysis	[email protected]
Oct 21, 2025	CVE Modified	CISA-ADP
Oct 21, 2025	CVE Modified	CISA-ADP
Oct 21, 2025	CVE Modified	CISA-ADP
Aug 14, 2025	Modified Analysis	[email protected]
Aug 13, 2025	CVE Modified	CVE
Jul 14, 2025	Modified Analysis	[email protected]
Jul 12, 2025	CVE Modified	CVE
Jul 11, 2025	CVE CISA KEV Update	Cybersecurity and Infrastructure Security Agency (CISA) U.S. Civilian Government
Jul 10, 2025	CVE Modified	CISA-ADP
Jul 10, 2025	Initial Analysis	[email protected]
Jul 9, 2025	CVE Modified	CISA-ADP
Jun 24, 2025	CVE Modified	[email protected]
Jun 17, 2025	New CVE Received	[email protected]