CVE-2025-5777

nvd nist nuclei

Published: Jun 17, 2025Modified: Jun 17, 2026CISA KEV

9.3

Vector

CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:L/SI:L/SA:L/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X

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CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:L/SI:L/SA:L/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:XShow less

Source: secure@citrix.com (Secondary)

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

Affected (7)

Products: Citrix: Netscaler Application Delivery Controller, Netscaler Gateway

2 products

Netscaler Application Delivery Controller

Netscaler Gateway

Configuration A

7 vulnerable

Vulnerable Software	Affected Versions
Citrix Netscaler Application Delivery Controller	From 13.1 to 13.1-58.32
Citrix Netscaler Application Delivery Controller	From 14.1 to 14.1-43.56
Citrix Netscaler Application Delivery Controller	From 12.1 to 12.1-55.328
Citrix Netscaler Application Delivery Controller	From 13.1 to 13.1-37.235
Citrix Netscaler Application Delivery Controller	From 13.1 to 13.1-37.235
Citrix Netscaler Gateway	From 13.1 to 13.1-58.32
Citrix Netscaler Gateway	From 14.1 to 14.1-43.56

Related CWEs

Out-of-bounds Read

The product reads data past the end, or before the beginning, of the intended buffer.

Use of Uninitialized Variable

The code uses a variable that has not been initialized, leading to unpredictable or unintended results.

Use of Uninitialized Resource

The product uses or accesses a resource that has not been initialized.

References (10)

https://support.citrix.com/support-home/kbsearch/article?articleNumber=CTX693420

Source: secure@citrix.com

Vendor Advisory

https://citrixbleed.com

Source: af854a3a-2127-422b-91ae-364da2661108

Broken LinkThird Party Advisory

https://horizon3.ai/attack-research/attack-blogs/cve-2025-5777-citrixbleed-2-write-up-maybe/

Source: af854a3a-2127-422b-91ae-364da2661108

Third Party Advisory

https://labs.watchtowr.com/how-much-more-must-we-bleed-citrix-netscaler-memory-disclosure-citrixbleed-2-cve-2025-5777/

Source: af854a3a-2127-422b-91ae-364da2661108

Third Party Advisory

https://www.bleepingcomputer.com/news/security/cisa-tags-citrix-bleed-2-as-exploited-gives-agencies-a-day-to-patch/

Source: af854a3a-2127-422b-91ae-364da2661108

Press/Media CoverageThird Party Advisory

https://www.netscaler.com/blog/news/netscaler-critical-security-updates-for-cve-2025-6543-and-cve-2025-5777/

Source: af854a3a-2127-422b-91ae-364da2661108

Third Party Advisory

https://www.theregister.com/2025/07/10/cisa_citrixbleed_kev/

Source: af854a3a-2127-422b-91ae-364da2661108

Press/Media Coverage

https://doublepulsar.com/citrixbleed-2-exploitation-started-mid-june-how-to-spot-it-f3106392aa71

Source: 134c704f-9b21-4f2e-91b3-4a467353bcc0

Third Party Advisory

https://reliaquest.com/blog/threat-spotlight-citrix-bleed-2-vulnerability-in-netscaler-adc-gateway-devices/

Source: 134c704f-9b21-4f2e-91b3-4a467353bcc0

Third Party Advisory

https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2025-5777

Source: 134c704f-9b21-4f2e-91b3-4a467353bcc0

US Government Resource

Timeline

No history available yet.