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CVE-2026-8655— Multiple Memory overflow vulnerabilities leading to unpredictable or erroneous behavior and Denial of Service

Quick assessment

Affected
NetScaler ADC
Exploitation
No confirmed in-the-wild exploitation; assess based on exposure
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.

NetScaler ADC是NetScaler公司的一款负载均衡产品。 NetScaler ADC存在缓冲区错误漏洞，该漏洞源于内存溢出问题，可能导致不可预测或错误行为以及拒绝服务，当NetScaler ADC配置为Oracle类型负载均衡器、DNS代理或DNS递归解析器时。

AI Predicted 5.3 Difficulty: Moderate EPSS 0.63% · P48

Possible ATT&CK Techniques 1 AI

T1190 · Exploit Public-Facing Application

Affected Version Matrix 6

VendorProduct Version RangeStatus
NetScaler ADC 14.1< 72.61 affected
13.1< 63.18 affected
14.1 FIPS< 72.61 affected
13.1 FIPS and NDcPP< 37.272 affected
NetScaler Gateway 14.1< 72.61 affected
13.1< 63.18 affected
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I. Basic Information for CVE-2026-8655

Vulnerability Information
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Vulnerability Title
Multiple Memory overflow vulnerabilities leading to unpredictable or erroneous behavior and Denial of Service
Source: CVE Program / CVE List V5
Vulnerability Description
Multiple Memory overflow vulnerabilities in NetScaler ADC and NetScaler Gateway leading to unpredictable or erroneous behavior and Denial of Service if NetScaler ADC is configured as an LB of type Oracle OR NetScaler ADC is configured as a DNS Proxy OR NetScaler ADC is configured as a DNS recursive resolver deployment
Source: CVE Program / CVE List V5
CVSS Information
CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:L/VI:L/VA:H/SC:N/SI:N/SA:L
Source: CVE Program / CVE List V5
Vulnerability Type
N/A
Source: CVE Program / CVE List V5
Vulnerability Title
NetScaler ADC 缓冲区错误漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
NetScaler ADC是NetScaler公司的一款负载均衡产品。 NetScaler ADC存在缓冲区错误漏洞，该漏洞源于内存溢出问题，可能导致不可预测或错误行为以及拒绝服务，当NetScaler ADC配置为Oracle类型负载均衡器、DNS代理或DNS递归解析器时。
Source: CNNVD (China National Vulnerability Database)
CVSS Information
N/A
Source: CNNVD (China National Vulnerability Database)
Vulnerability Type
N/A
Source: CNNVD (China National Vulnerability Database)

Affected Products

Vendor Product Affected Versions CPE Subscribe
NetScaler ADC 14.1 ~ 72.61 -
NetScaler Gateway 14.1 ~ 72.61 -

II. Public POCs for CVE-2026-8655

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III. Intelligence Information for CVE-2026-8655

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Vendor Advisories for CVE-2026-8655 (1)

Same Patch Batch · NetScaler · 2026-06-30 · 6 CVEs total

CVE-2026-8452 8.8 HIGH Memory overflow vulnerability leading to unpredictable or erroneous behavior and Denial of
CVE-2026-10817 Insufficient input validation leading to memory overread
CVE-2026-10816 Arbitrary File Read (Unauthenticated)
CVE-2026-13474 Denial of service via malformed HTTP/2 requests
CVE-2026-8451 Insufficient input validation leading to memory overread

IV. Related Vulnerabilities

Same product: ADC
Same vendor: NetScaler

V. Comments for CVE-2026-8655

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