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Vulnerability record · CVE-2020-15956 · published 4 August 2020

CVE-2020-15956: Acti nvr classic buffer overflow vulnerability

Acti · Nvr

ActiveMediaServer.exe in ACTi NVR3 Standard Server 3.0.12.42 allows remote unauthenticated attackers to trigger a buffer overflow and application termination via a malformed payload.

7.5 CVSS 3.1 High EPSS 16% · top 3.2% CWE-120 · Classic buffer overflow
7.5CVSS 3.1 base score, v2 5.0
16%EPSS exploitation probability, 30 days
NoNot in CISA KEV
1Affected product versions listed by NVD
6References, 4 tagged exploit
17 Jun 2026Last modified by NVD

Description

ActiveMediaServer.exe in ACTi NVR3 Standard Server 3.0.12.42 allows remote unauthenticated attackers to trigger a buffer overflow and application termination via a malformed payload.

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

Affected products

1 vulnerable configurations from NVD's CPE data, grouped by vendor and product.

References

LinkTags
http://packetstormsecurity.com/files/158771/ACTi-NVR3-Standard-Professional-Server-3.0.12.42-Denial-Of-Service.html ExploitThird Party Advisory
https://github.com/megamagnus/cve-2020-15956 ExploitThird Party Advisory
https://www2.acti.com/nvr3 ProductVendor Advisory
http://packetstormsecurity.com/files/158771/ACTi-NVR3-Standard-Professional-Server-3.0.12.42-Denial-Of-Service.html ExploitThird Party Advisory
https://github.com/megamagnus/cve-2020-15956 ExploitThird Party Advisory
https://www2.acti.com/nvr3 ProductVendor Advisory

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Same products first, then exploited flaws of the same weakness class.

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Source: NIST National Vulnerability Database (record CVE-2020-15956), CISA KEV, FIRST EPSS (scores of 2026-09-26). This page is refreshed as NVD updates the record.