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Full vulnerability report · 2026
CVE-2026-19490High confidence

Citrix NetScaler Authentication Bypass Using an Alternate Path or Channel Vulnerability

Citrix · NetScaler

9.3CriticalCVSS 4.0
Recommended action
Patch now

CISA confirms exploitation in the wild and lists 2026-09-12 as the remediation due date.

Patch available
R
Operational reassessment

Published severity in operational context

Open reassessment dashboard →
Published severityCriticalOperational priority:Critical, unchanged from published severity.unchanged

Evidence used

  • CISA confirms exploitation in the wild.
  • The selected CVSS metric records a network-reachable, unauthenticated path with no user interaction.
  • EPSS is 23.16% for the current model date.

Compensating controls

  • Validate the affected product branch and deploy the verified fixed release.
  • Restrict the affected network interface to trusted sources where business-safe.
  • Increase monitoring for the attack path and post-exploitation behaviour described in the report.

Verification

  1. Confirm that the asset runs Citrix NetScaler and falls inside the recorded affected range.
  2. Verify the installed build against the product-specific fixed version after deployment.
  3. Validate exposure, authentication requirements and compensating controls in the actual environment.
  4. Reopen this reassessment when CVSS, KEV, EPSS, exploit evidence or remediation changes.
Mitigation target: Within 3 daysRemediation target: Within 90 days

This automated reassessment organises public evidence. It does not know asset exposure, business impact or control effectiveness and does not replace CVSS or a human risk decision.

Optional official sources

National CERT insights
?CERT means Computer Emergency Response Team; CSIRT is the closely related term Computer Security Incident Response Team.

Choose official national sources for this report. Each advisory shows its original language. Your selection is remembered on this device and included in shared links.

Official European source

ENISA European Vulnerability Database

Official EUVD identifiers, advisory evidence and known-exploited context. Missing fields are not treated as evidence of low risk.

1 current
ENISA EUVD identifier

EUVD-2026-62395

CISA KEV mirrored by ENISA

Vulnerability in NetScaler ADC and NetScaler Gateway. This issue affects ADC: from 14.1 through 73.32 and from 13.1 through 63.21; Gateway: from 14.1 through 73.32 and from 13.1 through 63.21.

EUVD state
Present in the current official mapping
Known exploitation
Recorded by ENISA since 9 Sep 2026. Evidence sources: cisa_kev.
ENISA score
9.3 · CVSS 4.0
Advisory evidence
1 linked advisory record
Explicit mitigation evidence

Only statements that explicitly mention a fix, patch, update, workaround or mitigation are shown here.

  • csaf_ncscnl · NCSC-2026-0318Kwetsbaarheden verholpen in Citrix NetScaler ADC en NetScaler Gateway
Recommended actionPatch now

CISA confirms exploitation in the wild and lists 2026-09-12 as the remediation due date.

Patch available
01

What, why and how

Citrix NetScaler ADC and NetScaler Gateway contain an authentication-bypass vulnerability involving an alternate path or channel. When the NetScaler appliance is configured as an AAA virtual server or as a Gateway (SSL VPN, ICA Proxy, CVPN, or RDP Proxy), an unauthenticated remote threat actor may be able to bypass authentication.

What

Citrix NetScaler ADC and NetScaler Gateway contain an authentication-bypass vulnerability involving an alternate path or channel. When the NetScaler appliance is configured as an AAA virtual server or as a Gateway (SSL VPN, ICA Proxy, CVPN, or RDP Proxy), an unauthenticated remote threat actor may be able to bypass authentication.

Why

The product requires authentication, but the product has an alternate path or channel that does not require authentication.

How

An attacker operating through a network path may attempt exploitation without authentication or user interaction. If successful, the issue may cause the confidentiality, integrity or availability impact described by the vendor.

What

Citrix NetScaler ADC and NetScaler Gateway contain an authentication-bypass vulnerability involving an alternate path or channel. When the NetScaler appliance is configured as an AAA virtual server or as a Gateway (SSL VPN, ICA Proxy, CVPN, or RDP Proxy), an unauthenticated remote threat actor may be able to bypass authentication.

Why

The product requires authentication, but the product has an alternate path or channel that does not require authentication.

How

An attacker operating through a network path may attempt exploitation without authentication or user interaction. If successful, the issue may cause the confidentiality, integrity or availability impact described by the vendor.

02

Exploit reality and attack path

CVSS severity, EPSS forecast probability, public exploit material and CISA-confirmed exploitation are separate signals.

Observed exploitation
?Confirmed exploitation and public exploit material are separate signals. Attacks can occur without public proof-of-concept or exploit code.
Confirmed in the wild

CISA added this CVE to its Known Exploited Vulnerabilities catalogue on 2026-09-09.

Public PoC / exploit material
?Confirmed exploitation and public exploit material are separate signals. Attacks can occur without public proof-of-concept or exploit code.
None recorded

No exploit-tagged reference or CISA SSVC proof-of-concept state is currently recorded. Research may still exist outside the structured feeds.

Likely attack path
a network path → Authentication Bypass Using an Alternate Path or Channel → cause the confidentiality, integrity or availability impact described by the vendor
Attack surface
Network
Privileges required
None: unauthenticated exploitation is possible
User interaction
None
Attack complexity
Low: no specialised conditions are recorded
Security boundary
Not a CVSS 4.0 base metric
Weakness
?CWE means Common Weakness Enumeration: a standard category for the underlying weakness.
CWE-288 ↗

CWE-288: Authentication Bypass Using an Alternate Path or Channel. The product requires authentication, but the product has an alternate path or channel that does not require authentication.

CVSS vector
?CVSS means Common Vulnerability Scoring System. The vector records the metric values used to calculate technical severity.
CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:L/SI:L/SA:L

Common Vulnerability Scoring System 4.0: the compact vector below is decoded into plain language.

AVNetworkAttack vector: The vulnerable component can be reached over a network.ACLowAttack complexity: No specialised conditions are required beyond attacker-controlled input.ATNoneAttack requirements: No additional deployment or execution condition is required.PRNonePrivileges required: The attacker does not need an account or existing privileges.UINoneUser interaction: No action by another user is required.VCHighVulnerable-system confidentiality: A successful attack can cause a major loss.VIHighVulnerable-system integrity: A successful attack can cause a major loss.VAHighVulnerable-system availability: A successful attack can cause a major loss.SCLowSubsequent-system confidentiality: A successful attack can cause a limited loss.SILowSubsequent-system integrity: A successful attack can cause a limited loss.SALowSubsequent-system availability: A successful attack can cause a limited loss.
Post-exploitation / living off the land
No specific living-off-the-land technique is confirmed in the structured sources. Monitor normal administration tools for activity inconsistent with the affected service's baseline.
NetworkUnauthenticatedCWE-288CISA KEV
A

Official authority intelligence

Only matched European and national findings are included. Language selectors and unavailable sources are omitted.

ENISA EUVD · EUVD-2026-62395Known-exploited evidence recorded

Vulnerability in NetScaler ADC and NetScaler Gateway. This issue affects ADC: from 14.1 through 73.32 and from 13.1 through 63.21; Gateway: from 14.1 through 73.32 and from 13.1 through 63.21.

Official EUVD record ↗
BSI · German · WID-SEC-2026-2927Citrix Systems NetScaler (Gateway und ADC): Mehrere Schwachstellen

Ein Angreifer kann mehrere Schwachstellen in Citrix Systems NetScaler (Gateway und ADC) ausnutzen, um einen Denial of Service Angriff durchzuführen und um Sicherheitsvorkehrungen zu umgehen.

Official advisory ↗
Canadian Centre for Cyber Security · English · AL26-019AL26-019 - Vulnerabilities impacting Citrix NetScaler ADC and NetScaler Gateway - CVE-2026-19490 and CVE-2026-19489 - Update 1

An Alert is used to raise awareness of a recently identified cyber threat that may impact cyber information assets, and to provide additional detection and mitigation advice to recipients. The Canadian Centre for Cyber Security ("Cyber Centre") is also available to provide additional assistance regarding the content of this Alert to recipients as requested.

Official advisory ↗
Canadian Centre for Cyber Security · English · AV26-833Citrix security advisory (AV26-833) - Update 1

As of August 19, 2026, Citrix is affected by vulnerabilities in the following products: On September 9, 2026, Cybersecurity and Infrastructure Security Agency (CISA) added CVE-2026-19490 to their Known Exploited Vulnerabilities (KEV) Database.

Official advisory ↗
Cyber Security Agency of Singapore · English · CSA-SB-20260826Security Bulletin 26 Aug 2026

The Cyber Security Agency of Singapore included this CVE in its official Security Bulletin 26 Aug 2026, published on 26 August 2026. Open the linked bulletin for the product, severity and reference information published in that issue.

Official advisory ↗
INCIBE-CERT · Spanish · multiples-vulnerabilidades-en-netscaler-adc-y-netscaler-0Múltiples vulnerabilidades en NetScaler ADC y NetScaler Gateway de Citrix

Citrix ha publicado 2 vulnerabilidades: 1 de severidad crítica y 1 de severidad alta que, en caso de ser explotadas, podrían permitir a un atacante omitir la autenticación mediante una ruta alternativa, provocar un comportamiento impredecible o una denegación de servicio.

Official advisory ↗
CERT-FR · French · CERTFR-2026-AVI-1059Multiples vulnérabilités dans les produits Citrix

De multiples vulnérabilités ont été découvertes dans les produits Citrix. Elles permettent à un attaquant de provoquer un déni de service à distance, un contournement de la politique de sécurité et un problème de sécurité non spécifié par l'éditeur.

Official advisory ↗
NBSZ-NKI · Hungarian · cve-2026-19490CVE-2026-19490

A termék megköveteli a hitelesítést, azonban az megkerülhető alternatív elérési útvonalon vagy csatornán keresztül.

Official advisory ↗
CSIRT Italia · Italian · vulnerabilita-in-prodotti-citrix-12Vulnerabilità in prodotti Citrix

La vulnerabilità identificata tramite la CVE-2026-19490 , di tipo "Authentication Bypass" e con score CVSS v3.1 pari a 9.8, interessa i dispositivi Citrix NetScaler ADC e Citrix NetScaler Gateway, in presenza di specifiche configurazioni. Tale vulnerabilità, qualora sfruttata da un attaccante remoto non autenticato, potrebbe aggirare i meccanismi di autenticazione e instaurare sessioni utente non autorizzate, ottenendo l'accesso a risorse normalmente protette. Ciò potrebbe determinare la compromissione della riservatezza delle informazioni trattate e favorire ulteriori attività malevole sui sistemi interessati.

Official advisory ↗
JVN iPedia · Japanese · JVNDB-2026-033011シトリックス・システムズのnetscaler application delivery controller等の複数製品における代替パスまたはチャネルを使用した認証回避に関する脆弱性

NetScaler ADCおよびNetScaler Gatewayには脆弱性があります。この問題は、ADCのバージョン14.1から73.32までと13.1から63.21までに影響を与えます。Gatewayもバージョン14.1から73.32までと13.1から63.21までに影響を受けます。

Official advisory ↗
KISA KrCERT/CC · Korean · KNVD-6948美 CISA 발표 주요 Exploit 정보공유(Update. 2026-09-09)

Citrix NetScaler Authentication Bypass Using an Alternate Path or Channel Vulnerability

Official advisory ↗
KISA KrCERT/CC · Korean · KNVD-6919Citrix 제품 보안 업데이트 권고

NetScaler ADC, NetScaler Gateway에서 발생하는 Authentication Bypass Using an Alternate Path or Channel 취약점(CVE-2026-19490) [1][3]

Official advisory ↗
NCSC-NL · Dutch · NCSC-2026-0318Kwetsbaarheden verholpen in Citrix NetScaler ADC en NetScaler Gateway

De kwetsbaarheid met kenmerk CVE-2026-19489 betreft een memory overflow in NetScaler ADC en NetScaler Gateway, wanneer de producten zijn geconfigureerd als SIP ALG binnen een Large Scale NAT (LSN) groep. Deze fout in de geheugenallocatie kan leiden tot onvoorspelbaar gedrag of een denial of service, waardoor de normale werking van het systeem verstoord kan worden. De kwetsbaarheid met kenmerk CVE-2026-19490 maakt het voor een aanvaller mogelijk om via een alternatieve route de normale authenticatiemechanismen te omzeilen, om zodoende ongeautoriseerde toegang tot het systeem te verkrijgen. Om kwetsbaar te zijn moeten de producten in combinatie met specifieke versies geconfigureerd zijn als Gateway (VPN-virtuele server, ICA Proxy, CVPN, RDP Proxy), AAA virtual server of configureerd zijn als SAML Identity Provider. Dit laatste is geen gebruikelijke configuratie. **UPDATE** Er is Proof of Concept code beschikbaar voor CVE-2026-19490. Het NCSC acht het zeer waarschijnlijk dat op korte termijn misbruik zal plaatsvinden.

Official advisory ↗
03

Patch and workaround

Operational remediation based on structured source evidence.

Status
?Patch availability is based on structured fixed-version fields and authoritative update references. If no fix is verified, check the vendor advisory before making a change.
Patch available
Affected
Fixed
The Cyber Centre recommends that organizations using Citrix NetScaler ADC and NetScaler Gateway appliances (particularly for SAML IDP-configured appliances), review the Citrix security bulletin Footnote 1 and update/upgrade the affected systems to the following vendor-supported fixed versions: Affected product Affected versions Fixed versions NetScaler ADC and NetScaler Gateway 14.1 versions prior to 14.1-73.32 version 14.1-73.32 and later NetScaler ADC and NetScaler Gateway 13.1 versions prior to 13.1-63.21 version 13.1-63.21 and later NetScaler ADC FIPS versions prior to 14.1-73.32 FIPS version 14.1-73.32 FIPS and later NetScaler ADC FIPS and NDcPP versions prior to 13.1-37.277 version 13.1-37.277 and later The Cyber Centre also recommends organizations to: determine the current version of software on each appliance identify NetScaler appliances configured as Gateway services or AAA virtual servers review configurations for SAML authentication deployments, where applicable prioritize patching affected systems on an emergency basis monitor authentication logs and network activity for indications of unauthorized access follow Citrix incident response guidance if compromise is suspected after patching, verify the appliance is running the updated version and review logs for unusual activity Citrix has provided steps to take if NetScaler ADC or NetScaler Gateway are suspected to be compromised Footnote 7 . In addition, the Cyber Centre strongly recommends that organizations review and implement the Cyber Centre's Top 10 IT Security Actions Footnote 8 with an emphasis on the following topics: consolidate, monitor, and defend Internet gateways patch operating systems and applications harden operating systems and applications isolate web-facing applications Should activity matching the content of this alert be discovered, recipients are encouraged to report via My Cyber Portal , or email contact@cyber.gc.ca .
Action
Apply the fixed release for the affected product branch as recorded by Canadian Centre for Cyber Security. Validate the exact product and build in the linked advisory before deployment.
Workaround
No verified workaround is recorded. If business-safe, reduce exposure to the affected interface and allow only trusted sources until authoritative guidance is available.
04

Evidence and provenance

Published 19 Aug 2026 · Last source change 7 Oct 2026, 18:01 UTC · CWE-288 · Authentication Bypass Using an Alternate Path or Channel

CVE recordCVE.org · 5.2
CVSS sourceCNA
EPSS source
?The date BlackTree first stored a score for this CVE from the daily FIRST EPSS feed.
FIRST · tracked since 2026-08-23
European sourceENISA EUVD · EUVD-2026-62395
Product sourceCISA KEV
Remediation sourceCVE/CNA references
CWE sourceCISA ADP
NVD statusNVD enriched

Core structured fields are present and their contributing authorities are shown above.

Material change intelligence

What changed after publication

View recent updates ↗
  1. Vendor guidanceAuthoritative vendor guidance changed: removed remediation: cyber.gc.ca/al26-019-vulnerabilities-impacting-citrix-netscaler-adc-netscaler-gateway-cve-2026-19490-cve-2026-19489.
    Before
    remediation: cyber.gc.ca/al26-019-vulnerabilities-impacting-citrix-netscaler-adc-netscaler-gateway-cve-2026-19490-cve-2026-19489 · vendor advisory: support.citrix.com/article?articleNumber=CTX696939
    After
    vendor advisory: support.citrix.com/article?articleNumber=CTX696939
    support.citrix.com ↗
  2. Affected versionsThe structured affected or fixed version information changed.
    Before
    ADC: 14.1 ≤ 73.32, 13.1 ≤ 63.21; Gateway: 14.1 ≤ 73.32, 13.1 ≤ 63.21 · Fixed: The Cyber Centre recommends that organizations using Citrix NetScaler ADC and NetScaler Gateway appliances (particularly for SAML IDP-configured appliances), review the Citrix security bulletin Footnote 1 and update/upgrade the affected systems to the following vendor-supported fixed versions: Affected product Affected versions Fixed versions NetScaler ADC and NetScaler Gateway 14.1 versions prior to 14.1-73.32 version 14.1-73.32 and later NetScaler ADC and NetScaler Gateway 13.1 versions prior to 13.1-63.21 version 13.1-63.21 and later NetScaler ADC FIPS versions prior to 14.1-73.32 FIPS version 14.1-73.32 FIPS and later NetScaler ADC FIPS and NDcPP versions prior to 13.1-37.277 version 13.1-37.277 and later The Cyber Centre also recommends organizations to: determine the current version of software on each appliance identify NetScaler appliances configured as Gateway services or AAA virtual servers review configurations for SAML authentication deployments, where applicable prioritize patching affected systems on an emergency basis monitor authentication logs and network activity for indications of unauthorized access follow Citrix incident response guidance if compromise is suspected after patching, verify the appliance is running the updated version and review logs for unusual activity Citrix has provided steps to take if NetScaler ADC or NetScaler Gateway are suspected to be compromised Footnote 7 . In addition, the Cyber Centre strongly recommends that organizations review and implement the Cyber Centre's Top 10 IT Security Actions Footnote 8 with an emphasis on the following topics: consolidate, monitor, and defend Internet gateways patch operating systems and applications harden operating systems and applications isolate web-facing applications Should activity matching the content of this alert be discovered, recipients are encouraged to report via My Cyber Portal , or email contact@cyber.gc.ca .
    After
    ADC: 14.1 ≤ 73.32, 13.1 ≤ 63.21; Gateway: 14.1 ≤ 73.32, 13.1 ≤ 63.21 · Fixed: No fixed version is explicitly recorded in the structured CVE data.
    CISA KEV ↗
  3. Remediation statusRemediation status changed from Patch available to Awaiting fix.
    Before
    Patch available
    After
    Awaiting fix
    support.citrix.com ↗
  4. ENISA known-exploited stateENISA EUVD now records this CVE in its known-exploited dataset.
    Before
    not listed in ENISA EUVD known-exploited dataset
    After
    listed in ENISA EUVD known-exploited dataset (EUVD-2026-62395)
    ENISA EUVD ↗
  5. Vendor guidanceAuthoritative vendor guidance changed: removed remediation: cyber.gc.ca/al26-019-vulnerabilities-impacting-citrix-netscaler-adc-netscaler-gateway-cve-2026-19490-cve-2026-19489.
    Before
    remediation: cyber.gc.ca/al26-019-vulnerabilities-impacting-citrix-netscaler-adc-netscaler-gateway-cve-2026-19490-cve-2026-19489 · vendor advisory: support.citrix.com/article?articleNumber=CTX696939
    After
    vendor advisory: support.citrix.com/article?articleNumber=CTX696939
    support.citrix.com ↗
  6. Affected versionsThe structured affected or fixed version information changed.
    Before
    ADC: 14.1 ≤ 73.32, 13.1 ≤ 63.21; Gateway: 14.1 ≤ 73.32, 13.1 ≤ 63.21 · Fixed: The Cyber Centre recommends that organizations using Citrix NetScaler ADC and NetScaler Gateway appliances (particularly for SAML IDP-configured appliances), review the Citrix security bulletin Footnote 1 and update/upgrade the affected systems to the following vendor-supported fixed versions: Affected product Affected versions Fixed versions NetScaler ADC and NetScaler Gateway 14.1 versions prior to 14.1-73.32 version 14.1-73.32 and later NetScaler ADC and NetScaler Gateway 13.1 versions prior to 13.1-63.21 version 13.1-63.21 and later NetScaler ADC FIPS versions prior to 14.1-73.32 FIPS version 14.1-73.32 FIPS and later NetScaler ADC FIPS and NDcPP versions prior to 13.1-37.277 version 13.1-37.277 and later The Cyber Centre also recommends organizations to: determine the current version of software on each appliance identify NetScaler appliances configured as Gateway services or AAA virtual servers review configurations for SAML authentication deployments, where applicable prioritize patching affected systems on an emergency basis monitor authentication logs and network activity for indications of unauthorized access follow Citrix incident response guidance if compromise is suspected after patching, verify the appliance is running the updated version and review logs for unusual activity Citrix has provided steps to take if NetScaler ADC or NetScaler Gateway are suspected to be compromised Footnote 7 . In addition, the Cyber Centre strongly recommends that organizations review and implement the Cyber Centre's Top 10 IT Security Actions Footnote 8 with an emphasis on the following topics: consolidate, monitor, and defend Internet gateways patch operating systems and applications harden operating systems and applications isolate web-facing applications Should activity matching the content of this alert be discovered, recipients are encouraged to report via My Cyber Portal , or email contact@cyber.gc.ca .
    After
    ADC: 14.1 ≤ 73.32, 13.1 ≤ 63.21; Gateway: 14.1 ≤ 73.32, 13.1 ≤ 63.21 · Fixed: No fixed version is explicitly recorded in the structured CVE data.
    CISA KEV ↗
  7. Remediation statusRemediation status changed from Patch available to Awaiting fix.
    Before
    Patch available
    After
    Awaiting fix
    support.citrix.com ↗
  8. Affected versionsThe structured affected or fixed version information changed.
    Before
    14.1 ≤ 73.32; 13.1 ≤ 63.21 · Fixed: No fixed version is explicitly recorded in the structured CVE data.
    After
    ADC: 14.1 ≤ 73.32, 13.1 ≤ 63.21; Gateway: 14.1 ≤ 73.32, 13.1 ≤ 63.21 · Fixed: No fixed version is explicitly recorded in the structured CVE data.
    CNA ↗
  9. Vendor guidanceAuthoritative vendor guidance changed: added vendor advisory: support.citrix.com/article?articleNumber=CTX696939.
    Before
    no authoritative guidance recorded
    After
    vendor advisory: support.citrix.com/article?articleNumber=CTX696939
    support.citrix.com ↗
  10. Affected versionsThe structured affected or fixed version information changed.
    Before
    ADC: 14.1 ≤ 73.32, 13.1 ≤ 63.21; Gateway: 14.1 ≤ 73.32, 13.1 ≤ 63.21 · Fixed: No fixed version is explicitly recorded in the structured CVE data.
    After
    ADC: 14.1 ≤ 73.32, 13.1 ≤ 63.21; Gateway: 14.1 ≤ 73.32, 13.1 ≤ 63.21 · Fixed: The Cyber Centre recommends that organizations using Citrix NetScaler ADC and NetScaler Gateway appliances (particularly for SAML IDP-configured appliances), review the Citrix security bulletin Footnote 1 and update/upgrade the affected systems to the following vendor-supported fixed versions: Affected product Affected versions Fixed versions NetScaler ADC and NetScaler Gateway 14.1 versions prior to 14.1-73.32 version 14.1-73.32 and later NetScaler ADC and NetScaler Gateway 13.1 versions prior to 13.1-63.21 version 13.1-63.21 and later NetScaler ADC FIPS versions prior to 14.1-73.32 FIPS version 14.1-73.32 FIPS and later NetScaler ADC FIPS and NDcPP versions prior to 13.1-37.277 version 13.1-37.277 and later The Cyber Centre also recommends organizations to: determine the current version of software on each appliance identify NetScaler appliances configured as Gateway services or AAA virtual servers review configurations for SAML authentication deployments, where applicable prioritize patching affected systems on an emergency basis monitor authentication logs and network activity for indications of unauthorized access follow Citrix incident response guidance if compromise is suspected after patching, verify the appliance is running the updated version and review logs for unusual activity Citrix has provided steps to take if NetScaler ADC or NetScaler Gateway are suspected to be compromised Footnote 7 . In addition, the Cyber Centre strongly recommends that organizations review and implement the Cyber Centre's Top 10 IT Security Actions Footnote 8 with an emphasis on the following topics: consolidate, monitor, and defend Internet gateways patch operating systems and applications harden operating systems and applications isolate web-facing applications Should activity matching the content of this alert be discovered, recipients are encouraged to report via My Cyber Portal , or email contact@cyber.gc.ca .
    Canadian Centre for Cyber Security ↗
  11. Remediation statusRemediation status changed from Awaiting fix to Patch available.
    Before
    Awaiting fix
    After
    Patch available
    Canadian Centre for Cyber Security ↗
  12. BlackTree coverageBlackTree article coverage changed from 1 BlackTree article to 1 BlackTree article.
    Before
    1 BlackTree article
    After
    1 BlackTree article
    BlackTree editorial ↗
  13. BlackTree coverageBlackTree article coverage changed from 1 BlackTree article to 1 BlackTree article.
    Before
    1 BlackTree article
    After
    1 BlackTree article
    BlackTree editorial ↗
  14. BlackTree coverageBlackTree article coverage changed from no BlackTree article to 1 BlackTree article.
    Before
    no BlackTree article
    After
    1 BlackTree article
    BlackTree editorial ↗
  15. CISA KEV stateCISA KEV now confirms exploitation in the wild.
    Before
    not listed in CISA KEV
    After
    listed in CISA KEV since 2026-09-09
    CISA KEV ↗
  16. Catalogue recordCVE added to the BlackTree catalogue.
    CNA ↗
Material fields only · duplicate refreshes suppressed · history retained for the configured operational retention period
CVE published
Added to CISA KEV
Fixed release recorded from official guidance
ENISA EUVD · EUVD-2026-62395↗Canadian Centre for Cyber Security remediation guidance↗CISA KEV record↗CVE authority or vendor reference↗Official CVE record (CNA and ADP data)↗NVD record↗
Technical terms and abbreviations used in this report
CVE
Common Vulnerabilities and Exposures: the public identifier for one disclosed vulnerability.
CVSS
Common Vulnerability Scoring System: a technical severity framework; it is not patching priority by itself.
EPSS
Exploit Prediction Scoring System: FIRST's estimate of the probability that exploitation activity will be observed in the next 30 days; it is a forecast, not confirmation.
CWE
Common Weakness Enumeration: the standard category describing the underlying software or hardware weakness.
CNA
CVE Numbering Authority: an organisation authorised to assign and publish CVE records.
CISA ADP
Cybersecurity and Infrastructure Security Agency Authorized Data Publisher: structured enrichment added to a CVE record.
NVD
National Vulnerability Database: NIST's enrichment service for CVE records.
CERT / CSIRT
A computer security incident response team that publishes warnings or coordinates incident response.
PoC
Proof of concept: public material that demonstrates or helps reproduce exploitation.
CSAF
Common Security Advisory Framework: a machine-readable format for security advisories.
LoTL
Living off the land: abuse of legitimate tools or system functions during an attack.
Free version - for non-commercial use only.CVE-2026-19490 · cve.blacktree.nl