What is the CVSS score of CVE-2023-26999?

CVE-2023-26999 has a CVSS 3.1 base score of 9.8 (Critical). CVSS vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H. EPSS exploitation probability: 1.2%.

Which versions of Ngeniusone are affected by CVE-2023-26999?

CVE-2023-26999 presents critical security risk, a XML external entity vulnerability rated CVSS 9.8.

Is there a public PoC exploit available for CVE-2023-26999?

Yes, a public proof-of-concept exploit is available for CVE-2023-26999. Prioritise patching immediately. EPSS: 1.2%.

How to fix or mitigate CVE-2023-26999?

Within 24 hours: Identify all affected systems and apply vendor patches immediately. Monitor vendor channels for patch availability.

Ngeniusone CVE-2023-26999

CRITICAL

Improper Restriction of XML External Entity Reference (CWE-611)

2024-01-09 cve@mitre.org

Denial Of Service XXE RCE Ngeniusone

9.8

CVSS 3.1 · NVD

Severity by source

NVD PRIMARY

9.8 CRITICAL

AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

Primary rating from NVD · only source for this CVE.

CVSS VectorNVD

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

Attack Vector

Network

Attack Complexity

Low

Privileges Required

None

User Interaction

None

Scope

Unchanged

Confidentiality

High

Integrity

High

Availability

High

Lifecycle Timeline

Analysis Generated

Mar 28, 2026 - 19:34 vuln.today

PoC Detected

Jun 16, 2025 - 19:15 vuln.today

Public exploit code

CVE Published

Jan 09, 2024 - 02:15 nvd

CRITICAL 9.8

DescriptionNVD

An issue found in NetScout nGeniusOne v.6.3.4 allows a remote attacker to execute arbitrary code and cause a denial of service via a crafted file.

AnalysisAI

An issue found in NetScout nGeniusOne v.6.3.4 allows a remote attacker to execute arbitrary code and cause a denial of service via a crafted file. Rated critical severity (CVSS 9.8), this vulnerability is remotely exploitable, no authentication required, low attack complexity. Public exploit code available and no vendor patch available.

Technical ContextAI

This vulnerability is classified as XML External Entity (XXE) (CWE-611), which allows attackers to read arbitrary files or perform SSRF through XML processing. An issue found in NetScout nGeniusOne v.6.3.4 allows a remote attacker to execute arbitrary code and cause a denial of service via a crafted file. Affected products include: Netscout Ngeniusone.

RemediationAI

No vendor patch is available at time of analysis. Monitor vendor advisories for updates. Disable external entity processing in XML parsers, use JSON instead of XML where possible.