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CVE-2026-42369— GeoVision GV-VMS V20 WebCam Server stack overflow vulnerability

Quick assessment

Affected
GeoVision Inc. GV-VMS V20.0.2
Exploitation
No confirmed in-the-wild exploitation; assess based on exposure
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.

GeoVision GV-VMS是中国GeoVision公司的一款视频管理系统软件。 GeoVision GV-VMS V20 20.0.2版本存在缓冲区错误漏洞，该漏洞源于WebCam Server功能中base64解码字符串无界复制导致栈溢出，可能导致攻击者完全控制数据且缺乏ASLR时实现任意代码执行。

CVSS 10.0 · Critical EPSS 0.54% · P46

Affected Version Matrix 3

VendorProduct Version RangeStatus
GeoVision Inc. GV-VMS V20.0.2 V20.0.2 affected
V20.0.2.10 unaffected
V20.1.0.0 unaffected
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I. Basic Information for CVE-2026-42369

Vulnerability Information
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Vulnerability Title
GeoVision GV-VMS V20 WebCam Server stack overflow vulnerability
Source: CVE Program / CVE List V5
Vulnerability Description
GV-VMS V20 is a Video Monitoring Software used to gather the feeds of many surveillance cameras and manage other security devices. It is a native application accessed locally, but it is also possible to enable remote access via the "WebCam Server" feature. Once enabled, it is possible to access to the management and monitoring feature via a regular Web interface. This webersever is another native application, compiled without ASLR, which makes exploitation much easier and more likely. Most of the features require authentication before being reachable and leverage a standard login page to grant access. However the `gvapi` endpoint uses its own authentication mechanism via an `HTTP Authorization` header. It supports both `Basic` authentication and the `Digest` modes of authentication.   #### Stack-overflow via unbound copy of base64 decoded string The `b64decoder` string is sized dynamically, but it is then copied to the `Buffer` stack variable one character at the time at [0], and there's no bound-check. As such, if the decoded string is bigger than 256 characters (the size of the `Buffer` variable) then a stack overflow occurs. Because the data can be fully controlled by an attacker and lack of ASLR, this vulnerability can easily be exploited to gain full code execution as SYSTEM on the machine running the service.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:H
Source: CVE Program / CVE List V5
Vulnerability Type
跨界内存写
Source: CVE Program / CVE List V5
Vulnerability Title
GeoVision GV-VMS 缓冲区错误漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
GeoVision GV-VMS是中国GeoVision公司的一款视频管理系统软件。 GeoVision GV-VMS V20 20.0.2版本存在缓冲区错误漏洞，该漏洞源于WebCam Server功能中base64解码字符串无界复制导致栈溢出，可能导致攻击者完全控制数据且缺乏ASLR时实现任意代码执行。
Source: CNNVD (China National Vulnerability Database)
CVSS Information
N/A
Source: CNNVD (China National Vulnerability Database)
Vulnerability Type
N/A
Source: CNNVD (China National Vulnerability Database)

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Affected Products

Vendor Product Affected Versions CPE Subscribe
GeoVision Inc. GV-VMS V20.0.2 V20.0.2 -

II. Public POCs for CVE-2026-42369

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III. Intelligence Information for CVE-2026-42369

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Vendor Pages for CVE-2026-42369 (1)

Other References for CVE-2026-42369 (1)

Same Patch Batch · GeoVision Inc. · 2026-05-04 · 10 CVEs total

CVE-2026-42368 9.9 CRITICAL GeoVision LPC2011/LPC2211 Web Interface privilege escalation vulnerability
CVE-2026-42364 9.9 CRITICAL GeoVision LPC2011/LPC2211 Web Interface / DdnsSetting.cgi OS command injection vulnerabili
CVE-2026-7161 9.3 CRITICAL GeoVision GV-IP Device Utility Device Authentication insufficient encryption vulnerability
CVE-2026-42370 9.0 CRITICAL GeoVision GV-VMS V20 WebCam Server Login stack overflow vulnerability
CVE-2026-7372 9.0 CRITICAL GeoVision GV-VMS V20 WebCam Server Login stack overflow vulnerability
CVE-2026-42365 8.6 HIGH GeoVision LPC2011/LPC2211 Web Interface guessable session cookie vulnerability
CVE-2026-42366 7.4 HIGH GeoVision LPC2011/LPC2211 Web Interface / ssi.cgi reflected cross-site scripting (XSS) vul
CVE-2026-7371 7.4 HIGH GeoVision LPC2011/LPC2211 Web Interface / ssi.cgi reflected cross-site scripting (XSS) vul
CVE-2026-42367 6.5 MEDIUM GeoVision LPC2011/LPC2211 Web Interface / ssi.cgi privilege escalation vulnerability via l

IV. Related Vulnerabilities

Same product: GV-VMS V20.0.2
Same vendor: GeoVision Inc.
Same weakness: CWE-787