CVE-2023-53879 | BDVDB-2026-305949 Detail

neonguvenlikNVClient

Description#

NVClient 5.0 contains a stack buffer overflow vulnerability in the user configuration contact field that allows attackers to crash the application. Attackers can overwrite 846 bytes of memory by pasting a crafted payload into the contact box, causing a denial of service condition.

Impact#

Per CVSS v4.0: confidentiality impact none, integrity impact none, availability impact high. Attack vector: local.

Weaknesses#

CWE-121 Stack-based Buffer Overflow

References#

Exploit#

https://www.exploit-db.com/exploits/51700

History#

Version 12025-12-15Record published in the CVE List.
Version 22026-05-12Most recent update recorded in the CVE List.

Published

Published: 2025-12-15
Last modified: 2026-05-12

Vendor information

Vendor: neonguvenlik
Product: NVClient

All neonguvenlik vulnerabilities

Score

6.7 Medium

EPSS

less than 1%, Very Low

Estimated chance of exploitation in the next 30 days. EPSS percentile: 12.6.

KEV

Not listed in the CISA Known Exploited Vulnerabilities catalog.

Impact

Not classified

Action

No specific action is recorded in the source data. Check the references for vendor guidance.

Affected Systems

Vulnerable
5.0
Fixed
Not stated

Scoring System

CVSS v4.0

6.7 Medium

CVSS:4.0/AV:L/AC:L/AT:N/PR:N/UI:A/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N

Metric breakdown
Attack Vector	Local
Attack Complexity	Low
Attack Requirements	None
Privileges Required	None
User Interaction	Active
Vulnerable System Confidentiality	None
Vulnerable System Integrity	None
Vulnerable System Availability	High
Subsequent System Confidentiality	None
Subsequent System Integrity	None
Subsequent System Availability	None

CVSS v3.1

Not available

CVSS v3.0

Not available

CVSS v2

Not available

Source: CVE List v5 (record); CISA KEV (kev, action); FIRST EPSS (epss).