CVE-2025-5777

HIGHCISA KEV

7.5

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

CVE Details

CVSS v3.1 Score7.5

SeverityHIGH

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

Attack VectorNETWORK

ComplexityLOW

Privileges RequiredNONE

User InteractionNONE

Published6/17/2025

Last Modified10/30/2025

Sourcekev

Honeypot Sightings0

CISA KEV

VendorCitrix

ProductNetScaler ADC and Gateway

Vulnerability NameCitrix NetScaler ADC and Gateway Out-of-Bounds Read Vulnerability

KEV Date Added2025-07-10

Remediation Due Date2025-07-11

Ransomware UseKnown

Affected Products

citrix:netscaler_application_delivery_controllercitrix:netscaler_gateway

Weaknesses (CWE)

CWE-125CWE-908CWE-457

References

https://support.citrix.com/support-home/kbsearch/article?articleNumber=CTX693420(secure@citrix.com)

https://citrixbleed.com(af854a3a-2127-422b-91ae-364da2661108)

https://horizon3.ai/attack-research/attack-blogs/cve-2025-5777-citrixbleed-2-write-up-maybe/(af854a3a-2127-422b-91ae-364da2661108)

https://labs.watchtowr.com/how-much-more-must-we-bleed-citrix-netscaler-memory-disclosure-citrixbleed-2-cve-2025-5777/(af854a3a-2127-422b-91ae-364da2661108)

https://www.bleepingcomputer.com/news/security/cisa-tags-citrix-bleed-2-as-exploited-gives-agencies-a-day-to-patch/(af854a3a-2127-422b-91ae-364da2661108)

https://www.netscaler.com/blog/news/netscaler-critical-security-updates-for-cve-2025-6543-and-cve-2025-5777/(af854a3a-2127-422b-91ae-364da2661108)

https://www.theregister.com/2025/07/10/cisa_citrixbleed_kev/(af854a3a-2127-422b-91ae-364da2661108)

https://doublepulsar.com/citrixbleed-2-exploitation-started-mid-june-how-to-spot-it-f3106392aa71(134c704f-9b21-4f2e-91b3-4a467353bcc0)

https://reliaquest.com/blog/threat-spotlight-citrix-bleed-2-vulnerability-in-netscaler-adc-gateway-devices/(134c704f-9b21-4f2e-91b3-4a467353bcc0)

https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2025-5777(134c704f-9b21-4f2e-91b3-4a467353bcc0)

IOC Correlations

No correlations recorded

This product uses data from the NVD API but is not endorsed or certified by the NVD.