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CVE-2023-40300

29
FAUCET Score

CVE-2023-40300 is a critical vulnerability affecting NETSCOUT nGeniusPULSE 3.8, stemming from a hardcoded cryptographic key (CWE-798). With a CVSS score of 9.8, this flaw allows unauthenticated attackers to achieve complete compromise of confidentiality, integrity, and availability over the network with low attack complexity. While there is no evidence of active exploitation or public exploit code (Metasploit, Nuclei, ExploitDB), the vulnerability has garnered significant community discussion, indicating awareness among security researchers.

Impacted Technologies

VendorProductVersion(s)CPE
3.8.0-0.2349.0CPE matchmatch criteria
cpe:2.3:a:netscout:ngeniuspulse:3.8.0-0.2349.0:*:*:*:*:*:*:*

CVSS Data

CVSS version used by this source: 3.1

9.8CRITICAL

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 Impact
HIGH
Integrity Impact
HIGH
Availability Impact
HIGH
Exploitability Score
3.9
Impact Score
5.9
CvssVersion
3.1

Exploit Intelligence

EPSS Score
0.71%
Probability of exploitation in next 30 days
EPSS Percentile
49.6%
Percentile rank of EPSS score among Peer Group
As of 2026-07-27
Model: v2026.06.15
This CVE's current EPSS score of 0.0071 is in the 32nd percentile among its peer group of 36,862 CVEs.

Social Chatter

The average CVE in this peer group has 0.0 Twitter, 0.1 Reddit, 0.3 Bluesky, 0.3 Mastodon, and 2.4 GitHub mentions.

Media Mentions

No media coverage found for this CVE.

The average CVE in this peer group has 0.3 InfoSec Media, 0.0 Vendor Blog, and 0.0 Security Researcher mentions.

Remediation

Patch Available

Vendor Patches (2)

opnsensepatch availablevia llm_extracted
Fixed in: 3.11.0-0.397.0
pomeriumpatch availablevia llm_extracted
Fixed in: 3.11.0-0.397.0

Vendor Advisories (2)

pomeriumllm-pomerium-264bf8393d8d2db8CRITICAL

Hardcoded Cryptographic Key

Dec 7, 2023
opnsensellm-opnsense-1e4c3c6cdda5cf11CRITICAL

Hardcoded Cryptographic Key

Dec 7, 2023

References

netscout.com / securityadvisories
Vendor Advisory