Reference page — cumulative record through Monday, October 19, 2026 UTC. Reference pages update as the archive grows; only dated daily editions are immutable pages of record.

CVE-2025-5777

CVE-2025-5777CRITICAL

NetScaler ADC and NetScaler Gateway - Insufficient input validation leading to memory overread

  AV  AC  AT  PR  UI  VC  VI  VA   CVSS    EPSS    %ile   KEV
   N   L   N   N   N   H   H   H    9.3   .9997   100.0   YES

AFFECTED
  Product  Versions  Fixed
  ADC      14.1 –    —
  Gateway  14.1 –    —

TIMELINE
  Jun 6   Reserved by Citrix
  Jul 10  Added to CISA KEV, remediation due 2025-07-11
  Jul 10  Published (CNA: Citrix)

CWE-908, CWE-125 · CNA: Citrix · CVSS v4.0 · 10 references · NVD status: Analyzed · KEV due July 11, 2025

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

Lifecycle

Complete event history — 3 events, chronological
Date	Event	Detail
June 6, 2025	Reserved	Reserved by Citrix
July 10, 2025	KEV ADDED	Added to CISA KEV, remediation due 2025-07-11
July 10, 2025	Published	Published (CNA: Citrix)

Affected

Affected products and packages — 2 rows
Vendor	Product / Package	Ecosystem	Version introduced	Fixed
NetScaler	ADC	—	14.1	—
NetScaler	Gateway	—	14.1	—

Weaknesses

CWE-908 · CWE-125

References (10)

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

Authoritative record: CVE-2025-5777 at cve.org

Vendors: netscaler

Weaknesses: CWE-908 · CWE-125

About this page

This is a reference page, not a dated page of record. It assembles the complete lifecycle of CVE-2025-5777 from the CVE Program record, NVD enrichment, the CISA KEV catalog, EPSS, and OSV advisories. The box score's numbers (CVSS, EPSS, KEV status) are current as of Monday, October 19, 2026 UTC and are re-derived as the archive grows; only dated daily editions are immutable pages of record. The authoritative source for this identifier is cve.org.