CVE-2026-3055 (GCVE-0-2026-3055)
Vulnerability from cvelistv5 – Published: 2026-03-23 20:21 – Updated: 2026-03-31 03:55
VLAI?
CISA KEV
Title
Insufficient input validation leading to memory overread
Summary
Insufficient input validation in NetScaler ADC and NetScaler Gateway when configured as a SAML IDP leading to memory overread
Severity ?
CWE
- CWE-125 - Out-of-bounds Read
Assigner
References
Impacted products
Date Public ?
2026-03-23 19:20
CISA KEV
Known Exploited Vulnerability - GCVE BCP-07 Compliant
KEV entry ID: 3f9c5779-ead6-41cc-a01a-1ba8c5c8671f
Exploited: Yes
Timestamps
First Seen: 2026-03-30
Asserted: 2026-03-30
Scope
Notes: KEV entry: Citrix NetScaler Out-of-Bounds Read Vulnerability | Affected: Citrix / NetScaler | Description: Citrix NetScaler ADC (formerly Citrix ADC), NetScaler Gateway (formerly Citrix Gateway) and NetScaler ADC FIPS and NDcPP contain an out-of-bounds reads vulnerability when configured as a SAML IDP leading to memory overread. | Required action: Apply mitigations per vendor instructions, follow applicable BOD 22-01 guidance for cloud services, or discontinue use of the product if mitigations are unavailable. | Due date: 2026-04-02 | Known ransomware campaign use (KEV): Unknown | Notes (KEV): https://support.citrix.com/support-home/kbsearch/article?articleNumber=CTX696300&articleURL=NetScaler_ADC_and_NetScaler_Gateway_Security_Bulletin_for_CVE_2026_3055_and_CVE_2026_4368 ; https://nvd.nist.gov/vuln/detail/CVE-2026-3055
Evidence
Type: Vendor Report
Signal: Successful Exploitation
Confidence: 80%
Source: cisa-kev
Details
| Cwes | CWE-125 |
|---|---|
| Feed | CISA Known Exploited Vulnerabilities Catalog |
| Product | NetScaler |
| Due Date | 2026-04-02 |
| Date Added | 2026-03-30 |
| Vendorproject | Citrix |
| Vulnerabilityname | Citrix NetScaler Out-of-Bounds Read Vulnerability |
| Knownransomwarecampaignuse | Unknown |
References
Created: 2026-03-30 20:00 UTC
| Updated: 2026-03-30 20:00 UTC
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Sightings
| Author | Source | Type | Date |
|---|
Nomenclature
- Seen: The vulnerability was mentioned, discussed, or observed by the user.
- Confirmed: The vulnerability has been validated from an analyst's perspective.
- Published Proof of Concept: A public proof of concept is available for this vulnerability.
- Exploited: The vulnerability was observed as exploited by the user who reported the sighting.
- Patched: The vulnerability was observed as successfully patched by the user who reported the sighting.
- Not exploited: The vulnerability was not observed as exploited by the user who reported the sighting.
- Not confirmed: The user expressed doubt about the validity of the vulnerability.
- Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.
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