Threats / Citrix / CVE-2023-6548
CVE-2023-6548
· EUVD no mirror located
· GCVE no mirror located
Verified 2026-06-22
Citrix NetScaler ADC and Gateway vulnerability
Citrix NetScaler ADC and NetScaler Gateway contain a code injection vulnerability enabling authenticated remote code execution on the management interface.
Verdict
Today item — known-exploited.
An authenticated attacker with access to NSIP, CLIP, or SNIP can inject and execute arbitrary code on the management interface, leading to full system compromise. Active exploitation has been observed in the wild.
01
Is it exploitable?
— the evidence, ranked above the scoreReported exploitation
8 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 2024-01-17).
Probability (EPSS)
EPSS 0.03191 — modeled likelihood of exploitation activity.EPSS is a daily-changing model output — open the source for today's value.
Severity / affected
Affected: Citrix, NetScaler ADC and NetScaler Gateway. Confirm exact fixed builds in the vendor advisory.
Weakness (CWE)
Mapped to CWE-94 Code Injection — weakness family: Injection.CWE assignment from the public NVD record; the weakness class drives how the flaw is exploited.
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 authenticate to the NetScaler management interface using valid credentials or by reaching the internal network segment.
Business
Administrative access controls fail to prevent lateral movement from network segments with management interface visibility.
2
Keys to the kingdom — privilege/identity takeover narrative 2
Attacker
I inject malicious code through the management interface to bypass input validation and execute arbitrary commands.
Business
Code injection defenses are insufficient, allowing attackers to escalate from authenticated access to remote code execution.
3
Lateral reach — past segmentation narrative 3
Attacker
I gain full control of the NetScaler appliance and use it as a pivot point to compromise the broader network infrastructure.
Business
The appliance becomes a trusted attack platform for lateral movement, data exfiltration, and persistence within critical network segments.
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