Trending
CVE-2026-8655

CVE detail

CVE-2026-8655

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

CVSS 8.8 · HighBuzz score 25.4

Buzz score

Why this CVE is surfacing

Buzz score total 25.4

This all-time snapshot uses the same composite formula as Trending across a 30-year evidence window, rather than a current rolling window.

Buzz score components · mention 13.9 · diversity 11.5 · KEV 0.0 · OTX 0.0 · PoC 0.0

Mention score

13.9

3 evidence mentions in the snapshot

Diversity score

11.5

3 sources across 2 categories

KEV score

0.0

No KEV entry observed

OTX score

0.0

0 OTX pulses

PoC score

0.0

0 repos · best confidence N/A

Best PoC traction

Maximum stars on a matched PoC repo

Why it matters now

Mention timeline

Total mentions: 3; within the 30d window
Peak daily: 1; highest bucket

Evidence

Source links by recency

Newest mentions first

3 source links · newest first

New CitrixBleed-like NetScaler flaw sees exploit attempts in the wildCSO Online
ulnerability and there are signs of in-the-wild exploitation already. The new memory overread vulnerability, tracked as CVE-2026-8451, was found by researchers from security firm watchTowr who published a detailed write-up showing how unauthenticated malformed requests can result in protected process memory data being leaked back in responses. The ori
newswww.csoonline.comJul 3, 2026, 11:41 AM
Citrix Patches NetScaler Vulnerabilities, Including New ‘HTTP/2 Bomb’ AttackSecurityWeek
Citrix urges customers to patch NetScaler after fixing six vulnerabilities, including the HTTP/2 Bomb flaw and a high-severity CitrixBleed-style information disclosure bug.
newswww.securityweek.comJul 1, 2026, 11:20 AM
https://support.citrix.com/support-home/kbsearch/article?articleNumber=CTX696604support.citrix.com
No excerpt available.
Vendor Advisorysupport.citrix.comJun 30, 2026, 1:19 PM

Exploit code

Public exploit repository references

Public PoC repositories are third-party, potentially unsafe artifacts. Treat their code as untrusted and use it only on authorized systems in an isolated, least-privilege environment. cvebuzz does not execute the code or verify that an exploit works.

0 repository references · best confidence N/A · max 0 stars

No public PoC repositories have been matched yet.

Related records

Similar CVEs

6 related CVEs with shared weakness or product evidence

CVE-2026-8452
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…
CVSS 8.8 · High
3 mentions
CVE-2025-7776
Memory overflow vulnerability leading to unpredictable or erroneous behavior and Denial of Service in NetScaler ADC and NetScaler Gateway when NetScaler is configured as a Gateway…
CVSS 8.8 · High
9 mentions
CVE-2025-7775
Memory overflow vulnerability leading to Remote Code Execution and/or Denial of Service in NetScaler ADC and NetScaler Gateway when NetScaler is configured as Gateway (VPN virtual…
CVSS 9.2 · Critical
KEV listed12 mentions
CVE-2025-6543
Memory overflow vulnerability leading to unintended control flow and Denial of Service in NetScaler ADC and NetScaler Gateway when configured as Gateway (VPN virtual server, ICA P…
CVSS 9.2 · Critical
KEV listed16 mentions
CVE-2024-8534
Memory safety vulnerability leading to memory corruption and Denial of Service in NetScaler ADC and Gateway if the appliance must be configured as a Gateway (VPN Vserver) with RDP…
CVSS 8.4 · High
1 mention
CVE-2023-6549
Improper Restriction of Operations within the Bounds of a Memory Buffer in NetScaler ADC and NetScaler Gateway allows Unauthenticated Denial of Service and Out-Of-Bounds Memory Re…
CVSS 8.2 · High
KEV listed8 mentions

External lookup

Potential internet exposure

Potential exposure only — not proof of vulnerability.Shodan results indicate potentially internet-exposed products, not confirmed vulnerable systems. They do not confirm that any returned system is vulnerable to CVE-2026-8655.

Product-level CPE searches intentionally omit version fields and NVD version-range or configuration certainty. Verify the exact product version and configuration independently.

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Product CPE queries

Derived from this CVE's existing NVD CPE 2.3 records; the application, operating-system, or hardware part is retained.

cpe:2.3:a:citrix:netscaler_application_delivery_controllerSearch this product on Shodan
cpe:2.3:a:citrix:netscaler_gatewaySearch this product on Shodan

Exact CVE query

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Metadata

Canonical fields

NVD status

Analyzed

Published

Jun 30, 2026

Modified

Jul 1, 2026

Official record

Authoritative NVD record

CVSS vector

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/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X

CWE IDs

Vendor classifications

How this vector reads

CVSS 4.0 base metrics decoded below. This explanation does not recalculate or change the NVD score.

Attack Vector (AV): Network. The vulnerable system can be reached across network boundaries.
Attack Complexity (AC): Low. No special conditions beyond the attacker-controlled steps are required.
Attack Requirements (AT): None. No prerequisite deployment or execution condition is required.
Privileges Required (PR): None. The attacker needs no privileges on the vulnerable system.
User Interaction (UI): None. Exploitation does not require a targeted user to act.
Vulnerable System Confidentiality (VC): Low. There is a limited impact to this security property.
Vulnerable System Integrity (VI): Low. There is a limited impact to this security property.
Vulnerable System Availability (VA): High. There is a total or serious impact to this security property.
Subsequent System Confidentiality (SC): None. There is no direct impact to this security property.
Subsequent System Integrity (SI): None. There is no direct impact to this security property.
Subsequent System Availability (SA): Low. There is a limited impact to this security property.

Optional CVSS v4 metrics remain in the raw vector; only base metrics are expanded here.

Signals

Exploitation indicators

0 stored signals · no KEV · 0 OTX pulses