CVE-2026-8452 (GCVE-0-2026-8452)

Vulnerability from cvelistv5 – Published: 2026-06-30 12:41 – Updated: 2026-08-27 03:56
VLAI CISA Previdian
Title
Memory overflow vulnerability leading to unpredictable or erroneous behavior and Denial of Service
Summary
Memory overflow vulnerability NetScaler ADC and NetScaler Gateway leading to unpredictable or erroneous behavior and Denial of Service if the appliance is configured as a Gateway (SSL VPN, ICA Proxy, CVPN, RDP Proxy) or AAA virtual server
Severity
8.8 (High)
CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:L/VA:H/SC:L/SI:L/SA:L
SSVC
Exploitation: active Automatable: yes Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-08-26 00:00 UTC
CWE
  • CWE-119 - Improper Restriction of Operations within the Bounds of a Memory Buffer
Assigner
References
Impacted products
Vendor Product Version CPE status
NetScaler ADC Affected: 14.1 , < 72.61 (patch)
Affected: 13.1 , < 63.18 (patch)
Affected: 14.1 FIPS , < 72.61 (patch)
Affected: 13.1 FIPS and NDcPP , < 37.272 (patch)
guessed Create a notification for this product.
NetScaler Gateway Affected: 14.1 , < 72.61 (patch)
Affected: 13.1 , < 63.18 (patch)
guessed Create a notification for this product.
Date Public
2026-06-30 12:00
CISA
Known Exploited Vulnerability - GCVE BCP-07 Compliant
KEV entry ID: 0ced1346-1029-445e-9131-20f0b12ff2d6

Vulnerability ID: CVE-2026-8452

Status: Confirmed

Status Updated: 2026-08-26 00:00 UTC

Exploited: Yes

Timestamps
First Seen: 2026-08-26
Asserted: 2026-08-26
Scope
Notes: Citrix NetScaler ADC and NetScaler Gateway Improper Restriction of Operations within the Bounds of a Memory Buffer Vulnerability | Affected: Citrix / NetScaler ADC and NetScaler Gateway | Description: Citrix NetScaler ADC and NetScaler Gateway contain an improper restriction of operations within the bounds of a memory buffer vulnerability which could lead to denial of service. | Required action: Apply mitigations in accordance with vendor instructions, ensuring compliance with CISA’s BOD 26-04 Prioritizing Security Updates Based on Risk (see URL in Notes) guidance and CISA’s “Forensics Triage Requirements” (see URL in Notes). Follow applicable BOD 26-04 guidance for cloud services or discontinue use of the product if mitigations are unavailable. Stakeholders are responsible for evaluating each asset's internet exposure and ensuring adherence to BOD 26-04 patching guidelines. | Due date: 2026-08-29 | Known ransomware campaign use (KEV): Unknown | Notes (KEV): https://support.citrix.com/support-home/kbsearch/article?articleNumber=CTX696604 ; BOD 26-04: https://www.cisa.gov/news-events/directives/bod-26-04-prioritizing-security-updates-based-risk ; Forensics Triage Requirements: https://www.cisa.gov/news-events/directives/bod-26-04-implementation-guidance-prioritizing-security-updates-based-risk ; https://nvd.nist.gov/vuln/detail/CVE-2026-8452
Evidence

Type: Vendor Report

Signal: Successful Exploitation

Confidence: 80%

Source: cisa-kev

Details
Cwes CWE-119
Feed CISA Known Exploited Vulnerabilities Catalog
Product NetScaler ADC and NetScaler Gateway
Due Date 2026-08-29
Date Added 2026-08-26
Vendorproject Citrix
Vulnerabilityname Citrix NetScaler ADC and NetScaler Gateway Improper Restriction of Operations within the Bounds of a Memory Buffer Vulnerability
Knownransomwarecampaignuse Unknown
References
Created: 2026-08-26 18:00 UTC | Updated: 2026-08-26 18:00 UTC
Previdian
Known Exploited Vulnerability - GCVE BCP-07 Compliant
KEV entry ID: 791ad154-46f6-4362-8f50-627c7f7b7cee

Vulnerability ID: CVE-2026-8452

Status: Confirmed

Status Updated: 2026-08-17 08:04 UTC

Exploited: Yes

Timestamps
First Seen: 2026-08-17
Asserted: 2026-08-17
Scope
Notes: Memory overflow vulnerability leading to unpredictable or erroneous behavior and Denial of Service | Affected: NetScaler / ADC, Gateway | CVSS: 8.8 (HIGH) | EPSS: 0.00487 | Used in malware: unknown | Not yet in CISA KEV: True
Evidence

Type: Public Report

Signal: Successful Exploitation

Confidence: 70%

Source: kevintel

Details
Feed KEVIntel (kevintel.com)
Title Memory overflow vulnerability leading to unpredictable or erroneous behavior and Denial of Service
Vendor NetScaler
Product ADC, Gateway
Added Date 2026-08-17T08:04:34.863Z
Cvss Score 8.8
Epss Score 0.00487
Cvss Severity HIGH
Epss Percentile 0.39763
Used In Malware unknown
Ahead Of Cisa Kev None
Not Yet In Cisa Kev True
References
Created: 2026-08-17 09:00 UTC | Updated: 2026-08-17 09:00 UTC
Show details on NVD website
To clipboard 

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}



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Tags
Taxonomy of the tags.





Forecast uses a logistic model when the trend is rising, or an exponential decay model when the trend is falling. Fitted via linearized least squares.

Sightings

Author Source Type Date Other

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.


Detection rules are retrieved from Rulezet.