CVE-2023-53879

MEDIUM

NVClient 5.0 - Stack-based Buffer Overflow via User Configuration Contact Field

Title source: llm
STIX 2.1

Exploitation Summary

EIP tracks 1 public exploit for CVE-2023-53879. PoCs published by Ahmet Ümit BAYRAM.

AI-analyzed exploit summary This exploit demonstrates a stack buffer overflow in NVClient v5.0 by writing 846 'A' characters to a file, which when pasted into the 'Contact' field during user creation, triggers a crash (DoS). The PoC is functional and follows a clear reproduction path.

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.

Exploits (1)

exploitdb WORKING POC
by Ahmet Ümit BAYRAM · textlocalwindows
https://www.exploit-db.com/exploits/51700

This exploit demonstrates a stack buffer overflow in NVClient v5.0 by writing 846 'A' characters to a file, which when pasted into the 'Contact' field during user creation, triggers a crash (DoS). The PoC is functional and follows a clear reproduction path.

Classification
Working Poc 95%
Attack Type
Dos
Complexity
Trivial
Reliability
Reliable
Target: NVClient v5.0
Auth required
Prerequisites: Access to the application's user creation interface · Valid login credentials
devstral-2 · analyzed Feb 18, 2026 Full analysis →

References (3)

Core 3

Scores

CVSS v3 5.5
EPSS 0.0003
EPSS Percentile 7.5%
Attack Vector LOCAL
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H

CISA SSVC

Vulnrichment
Exploitation poc
Automatable no
Technical Impact partial

Details

CWE
CWE-121 CWE-787
Status published
Products (2)
eyemaxsystems/nvclient 5.0
neonguvenlik/NVClient 5.0
Published Dec 15, 2025
Tracked Since Feb 18, 2026