Threats / Citrix / CVE-2025-7775
CVE-2025-7775
· EUVD no mirror located
· GCVE no mirror located
Verified 2026-08-04
Citrix NetScaler vulnerability
Citrix NetScaler ADC and Gateway contain a memory overflow vulnerability enabling remote code execution or denial of service. Actively exploited in the wild.
Verdict
Today item — known-exploited.
A memory overflow in Citrix NetScaler products allows unauthenticated remote attackers to execute arbitrary code or crash services. Active exploitation demonstrates immediate threat to exposed instances.
CISA KEV Yes · 2025-08-265EPSS 0.19631 (verify live)6CVSS 9.23CISA SSVC Exploitation: active · Automatable: no · Impact: total4
01
Is it exploitable?
— the evidence, ranked above the scoreReported exploitation
16 independent public reports of in-the-wild exploitation are cataloged.Distinct reporting sources (vendor, incident response, government); open them for the underlying claims.
Exploited in the wild
Listed in the CISA Known Exploited Vulnerabilities catalog (added 2025-08-26).
Probability (EPSS)
EPSS 0.19631 — modeled likelihood of exploitation activity.EPSS is a daily-changing model output — open the source for today's value.
Severity / affected
CVSS 9.2 (CVSS:4.0/AV:N/AC:H/AT:P/PR:N/UI:N/VC:H/VI:H/VA:H/SC:L/SI:L/SA:L) · Affected: Citrix, NetScaler. Confirm exact fixed builds in the vendor advisory.CVSS — CNA-assigned (CVE.org), version 4.0, set at disclosure.
Weakness (CWE)
Mapped to CWE-119 Memory Buffer Bounds Error — weakness family: Memory safety.CWE — CNA-assigned (CVE.org); the weakness class drives how the flaw is exploited.
CISA SSVC (triage disposition)
Exploitation: active · Automatable: no · Technical Impact: totalCISA's own stakeholder-specific triage inputs, published in the CVE record (CISA Coordinator role). NOTE: this is CISA's three decision points; the final Act/Attend/Track decision also requires a Mission & Well-being input not published here, so no overall decision is asserted.
Currency of the record
CISA added this to its KEV catalog the same day the CVE record was published.KEV lag = CISA-KEV dateAdded − CVE.org datePublished; a floor on how long the known-exploited flaw sat in the public record before the federal catalog listed it. Severity/weakness here is CNA- or CISA-assigned (current at disclosure), independent of NVD's analysis backlog.
02
Who’s exploiting it?
— attribution turns risk into urgencyAttribution not established
No confirmed (advisory-backed) threat-actor attribution is established for this record. Absence of a named actor is not absence of compromise — see Coverage & confidence.
03
Why it matters
— the attack path, told twice: adversary, then board1
Front door — unauthenticated access narrative 1
Attacker
I craft a malicious request targeting the memory overflow in NetScaler to achieve code execution on the target system.
Business
Attackers gain unauthorized access to critical network infrastructure, potentially compromising all traffic and systems behind the gateway.
2
Keys to the kingdom — privilege/identity takeover narrative 2
Attacker
I exploit the vulnerability to crash the NetScaler service, disrupting network connectivity and access to protected resources.
Business
Denial of service impacts business continuity, blocking legitimate users from accessing applications and services.
3
Lateral reach — past segmentation narrative 3
Attacker
I establish persistent access through code execution to maintain control and exfiltrate sensitive data passing through the gateway.
Business
Data breach exposes confidential information, customer records, and intellectual property with regulatory and reputational consequences.
04
What to do
— defensible action- Remediate per the vendor advisory — confirm the fixed build for your version and verify exposure.1
Say it to the boardA vulnerability with this evidence profile is a defensible budget line, not a backlog ticket — fund the change against the proof above.
05