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CVE-2023-40253

27
FAUCET Score

CVE-2023-40253 is an Improper Authentication vulnerability affecting Genians Genian NAC V4.0, V5.0, Genian NAC Suite V5.0, and Genian ZTNA. This critical vulnerability, rated 9.8 CVSS, allows for authentication abuse with a network attack vector and low attack complexity, potentially leading to complete compromise of confidentiality, integrity, and availability. Currently, there is no evidence of active exploitation, public exploit code (Metasploit, Nuclei, ExploitDB), or significant community discussion or media coverage.

Impacted Technologies

VendorProductVersion(s)CPE
>= 4.0.0, < 4.0.156CPE matchmatch criteria
cpe:2.3:a:genians:genian_nac:*:*:*:*:-:*:*:*
>= 5.0.0, < 5.0.55CPE matchmatch criteria
cpe:2.3:a:genians:genian_nac:*:*:*:*:-:*:*:*
5.0.42CPE matchmatch criteria
cpe:2.3:a:genians:genian_nac:5.0.42:-:*:*:lts:*:*:*
5.0.42CPE matchmatch criteria
cpe:2.3:a:genians:genian_nac:5.0.42:revision_117460:*:*:lts:*:*:*
>= 6.0.0, < 6.0.16CPE matchmatch criteria
cpe:2.3:a:genians:genian_ztna:*:*:*:*:*:*:*:*

CVSS Data

CVSS version used by this source: 3.1

6.0MEDIUM

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

Attack Vector
LOCAL
Attack Complexity
LOW
Privileges Required
HIGH
User Interaction
NONE
Scope
CHANGED
Confidentiality Impact
NONE
Integrity Impact
HIGH
Availability Impact
NONE
Exploitability Score
1.5
Impact Score
4.0
CvssVersion
3.1

Exploit Intelligence

EPSS Score
0.37%
Probability of exploitation in next 30 days
EPSS Percentile
29.6%
Percentile rank of EPSS score among Peer Group
As of 2026-07-26
Model: v2026.06.15
This CVE's current EPSS score of 0.0037 is in the 7th percentile among its peer group of 36,835 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

Remediation records are not available for this CVE.

References

docs.genians.com / nac/5.0/release/ko/advisories/GN-SA-2023-001.html