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CVE-2023-3519

Unauthenticated remote code execution

CVSS 9.8 (CRITICAL) KEV: KNOWN CATALOG

Attention and evidence

HYPE SCORE
0.0/10
REALITY · THREAT PRIORITY
9.0/10
General review priority; not probability

Evidence confidence: Exploitation recorded

Why this priority?
  • Recorded exploitation baseline: +7.00
  • Technical severity: CVSS 9.8: +1.47
  • Fresh EPSS: 99.75%: +0.50

General review priority, not probability, victim count or asset-specific risk. A range covers missing CVSS/EPSS inputs within the current evidence state.

Sources: 29 documents and public datasets.

Hype components

Headline sample (25%)
0/100
Press, 30 days (60%)
0/100
Grounded branding (15%)
0/100
HYPE TOTAL0/100

Sources and documents

Rescana
Press · 18 Jun 2026, 07:00 · INC Ransomware Incident Analysis: Exploiting Citrix NetScaler and Fortinet Vulnerabilities Through Double Extortion Attacks - Rescana
IBM
Press · 08 Mar 2025, 05:06 · X-Force uncovers global NetScaler Gateway credential harvesting campaign - IBM
SecurityWeek
Press · 13 Nov 2024, 08:00 · Citrix, Cisco, Fortinet Zero-Days Among 2023’s Most Exploited Vulnerabilities - SecurityWeek
CyberSecurityNews
Press · 13 Nov 2024, 08:00 · CISA, NSA, & FBI Release List of 15 Most Exploited Vulnerabilities in 2023 - CyberSecurityNews
SC Media
Press · 28 Aug 2024, 07:00 · Iran-backed hackers partner with ransomware gangs, CISA advisory warns - SC Media
See all 29 source documents
The Hacker News
Press · 10 Oct 2023, 07:00 · Citrix Devices Under Attack: NetScaler Flaw Exploited to Capture User Credentials - The Hacker News
Security Affairs
Press · 09 Oct 2023, 07:00 · Large-scale Citrix NetScaler Gateway credential harvesting campaign exploits CVE-2023-3519 - Security Affairs
Check Point Research
Press · 04 Sep 2023, 07:00 · 4th September – Threat Intelligence Report - Check Point Research
Help Net Security
Press · 29 Aug 2023, 07:00 · Ransomware group exploits Citrix NetScaler systems for initial access - Help Net Security
cyfirma
Press · 25 Aug 2023, 07:00 · Unveiling CVE-2023-3519 : Citrix ADC & Gateway Vulnerability Analysis - cyfirma
SOC Prime
Press · 18 Aug 2023, 07:00 · CVE-2023-3519 Detection: RCE Zero-Day in Citrix NetScaler ADC and NetScaler Gateway Exploited in the Wild - SOC Prime
BleepingComputer
Press · 15 Aug 2023, 07:00 · New CVE-2023-3519 scanner detects hacked Citrix ADC, Gateway devices - BleepingComputer
BleepingComputer
Press · 15 Aug 2023, 07:00 · Almost 2,000 Citrix NetScaler servers backdoored in hacking campaign - BleepingComputer
Google Cloud
Press · 14 Aug 2023, 07:00 · Indicators of Compromise Scanner for Citrix ADC Zero-Day (CVE-2023-3519) | Mandiant - Google Cloud
EclecticIQ Blog
Press · 09 Aug 2023, 07:00 · Norwegian Cyberattack, Virustotal Data Leak and AI powered BEC - EclecticIQ Blog
GreyNoise
Press · 03 Aug 2023, 07:00 · Will the real Citrix CVE-2023-3519 please stand up? - GreyNoise
BleepingComputer
Press · 02 Aug 2023, 07:00 · Over 640 Citrix servers backdoored with web shells in ongoing attacks - BleepingComputer
Trellix
Press · 02 Aug 2023, 07:00 · The Bug Report – July 2023 Edition - Trellix
Unit 42
Press · 28 Jul 2023, 07:00 · Threat Brief: RCE Vulnerability CVE-2023-3519 on Customer-Managed Citrix Servers - Unit 42
TechCrunch
Press · 24 Jul 2023, 07:00 · Hackers exploit Citrix zero-day to target US critical infrastructure - TechCrunch
SC Media
Press · 24 Jul 2023, 07:00 · China-backed hackers suspected in NetScaler RCE attacks - SC Media
Homeland Security Today
Press · 21 Jul 2023, 07:00 · CISA Releases Cybersecurity Advisory on Threat Actors Exploiting Citrix CVE-2023-3519 - Homeland Security Today
Google Cloud
Press · 21 Jul 2023, 07:00 · Exploitation of Citrix Zero-Day by Possible Espionage Actors (CVE-2023-3519) | Mandiant - Google Cloud
SecurityWeek
Press · 21 Jul 2023, 07:00 · Citrix Zero-Day Exploited Against Critical Infrastructure Organization - SecurityWeek
Industrial Cyber
Press · 21 Jul 2023, 07:00 · Hackers exploiting RCE vulnerability in NetScaler, Gateway devices to implant webshells, CISA warns - Industrial Cyber
TechTarget
Press · 19 Jul 2023, 07:00 · Citrix NetScaler ADC and Gateway flaw exploited in the wild - TechTarget
BleepingComputer
Press · 18 Jul 2023, 07:00 · New critical Citrix ADC and Gateway flaw exploited as zero-day - BleepingComputer
SOCRadar
Press · 18 Jul 2023, 07:00 · Critical and High Flaws in Citrix ADC and Citrix Gateway - SOCRadar
Rapid7
Press · 18 Jul 2023, 07:00 · Critical Zero-Day Vulnerability in Citrix NetScaler ADC and NetScaler Gateway - Rapid7

Score evolution

● Hype   ● Reality

Earlier evidence-support scores are retained in history; this chart shows only the current priority definition.

First record: hype 0.0 · reality 9.0 (2026-11-02 15:13). The curve appears once the score changes.

Public exploit evidence

1

Public exploit entries / repo candidates

See 1 repos with metrics
RepositoryStarsForksLanguageUpdated
getdrive/PoC7315Ruby12 Aug 2024, 07:34
Evidence context and dated references

Reality is general threat/review priority, combining observed exploitation, CVSS severity and fresh EPSS. Evidence confidence is separate. This is not calibrated risk, a victim count or an asset-specific assessment. A range reflects missing numeric inputs.

Evidence in context

Confidence in exploitation evidence
Exploitation recorded
Priority basis
Recorded exploitation; CVSS 9.8; EPSS 99.7%
Attention, last 30 days
0 distinct story titles; 0 press documents; 0 publisher domains.
Technical potential
network access, no prior privileges, no user interaction.
Observed activity
Exploitation recorded in CISA KEV.
Known scale
Not quantified.
Evidence confidence basis
Trusted exploitation confirmation

Score evaluated: 2026-11-05 13:58:55.035007+00:00 · EPSS snapshot: 2026-11-05T12:03:04Z

Source event timeline
First press mention
18 Jul 2023, 07:00
Added to the CISA KEV catalog
19 Jul 2023, 00:00
Published
19 Jul 2023, 17:51
Latest press mention
18 Jun 2026, 07:00
Score calculated
05 Nov 2026, 13:58
PoCs on GitHub
1 repositories
Source: CVE List V5 · CISA KEV · FIRST EPSS · GitHub · RSSVulnRadar