CVE-2025-7775
Memory overflow vulnerability leading to Remote Code Execution and/or Denial of Service in NetScaler ADC and NetScaler Gateway when NetScaler is configured as Gateway (VPN virtual server, ICA Proxy, CVPN, RDP Proxy) or AAA virtual server (OR) NetScaler ADC and NetScaler Gateway 13.1, 14.1, 13.1-FIPS and NDcPP: LB virtual servers of type (HTTP, SSL or HTTP_QUIC) bound with IPv6 services or servicegroups bound with IPv6 servers (OR) NetScaler ADC and NetScaler Gateway 13.1, 14.1, 13.1-FIPS and NDcPP: LB virtual servers of type (HTTP, SSL or HTTP_QUIC) bound with DBS IPv6 services or servicegroups bound with IPv6 DBS servers (OR) CR virtual server with type HDX
do firstApply mitigations per vendor instructions, follow applicable BOD 22-01 guidance for cloud services, or discontinue use of the product if mitigations are unavailable.
Can a WAF block it? No. This is a memory-corruption bug. Generic WAF rules do not recognise the input that triggers it; only a rule written for this specific CVE can, and only if the triggering request has a recognisable shape.
Also consider: patch
Based on the weakness type only; no CVE-specific evidence yet. We check Cloudflare, AWS, Google Cloud Armor and Azure; for Akamai, Imperva, Fastly, F5, ask your vendor.
Is CVE-2025-7775 being exploited?
Yes. CVE-2025-7775 appears in CISA's Known Exploited Vulnerabilities catalog, which means exploitation in the wild has been confirmed and reported. Treat it as active rather than theoretical, and patch it ahead of higher-scoring vulnerabilities that carry no exploitation evidence.
How severe is CVE-2025-7775?
CVE-2025-7775 is rated Critical with a CVSS score of 9.8. Severity describes how bad exploitation would be, not how likely it is: pair it with exploitation evidence before deciding what to patch first.
Is there a patch for CVE-2025-7775?
Yes. A fix has been recorded for CVE-2025-7775. The vendor advisory is the authority on the exact fixed version — apply it from there rather than from a summary.
What does CVE-2025-7775 affect?
CVE-2025-7775 affects citrix:netscaler_application_delivery_controller, citrix:netscaler_gateway. Confirm the exact affected versions against the vendor advisory before deciding you are exposed.
Exploitation status reflects CISA's KEV catalog as we last synced it. Check the catalog directly.
- affected>= 14.1 and < 47.48
- affected>= 13.1 and < 59.22
- affected>= 13.1 FIPS and NDcPP and < 37.241
- affected>= 12.1 FIPS and NDcPP and < 55.330
- affected>= 14.1 and < 47.48
- affected>= 13.1 and < 59.22
- affected>= 13.1 FIPS and NDcPP and < 37.241
- affected>= 12.1 FIPS and NDcPP and < 55.330
As published in the CVE Program record. A version outside these ranges is not a statement that it is unaffected — vendors sometimes understate a range, and distribution-backported builds carry upstream numbers that do not reflect what was patched into them.
public exploits
Unvetted proof-of-concept code on GitHub: 4 GitHub proofs of concept
Listed so you can judge urgency, not as a recommendation to run anything. GitHub “proofs of concept” are unvetted: some are fake or carry malware. Exploit-DB marks the entries its staff verified.
cisa ssvc
- exploitation
- active
- automatable
- no
- technical impact
- total
Assessed by CISA 27 Aug 2025 (SSVC 2.0.3).
timeline
- 26 Aug 2025Added to CISA KEV (exploited in the wild)
- 26 Aug 2025Published · 1 day later
- 27 Aug 2025CISA SSVC assessment: exploitation active · 1 day later
- 28 Aug 2025First proof-of-concept repository on GitHub (unvetted) · 1 day later
- 28 Aug 2025CISA remediation due date (US federal agencies) · same day later
- 26 Feb 2026CVE record last updated · 183 days (about 6 months) later
- 2 Nov 2026Analysed by vulneraibility.com · 249 days (about 8 months) later
- Linksupport.citrix.com /support-home/kbsearch/article?articleNumber=CTX694938
- Linkcisa.gov /known-exploited-vulnerabilities-catalog?field_cve=CVE-2025-7775
sources
- CVE List (CVE.org): description, affected versions, references; CVE Terms of Use
- NVD: CVSS and CPE data
- CISA KEV catalog: exploitation, date added, due date
- CISA Vulnrichment (ADP): SSVC decision points
- FIRST EPSS: exploit probability and percentile
- PoC-in-GitHub: GitHub repositories that claim a proof of concept
- Summary, impact and triage tags: written by our AI analysis pipeline from the sources above. Check them against the sources.