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CVE-2020-15956

40
FAUCET Score

CVE-2020-15956 describes a buffer overflow vulnerability in ActiveMediaServer.exe within ACTi NVR3 Standard Server version 3.0.12.42. This flaw allows remote, unauthenticated attackers to trigger a denial of service by sending a malformed payload, leading to application termination. With a CVSS score of 7.5 (High), the vulnerability is easily exploitable over the network with no user interaction required, though its impact is limited to availability. While there is no evidence of active exploitation or Metasploit/Nuclei modules, a proof-of-concept exploit is publicly available on ExploitDB, yet it has received minimal community discussion or media coverage.

Impacted Technologies

VendorProductVersion(s)CPE
2.3.04.07CPE matchmatch criteria
cpe:2.3:a:acti:nvr:2.3.04.07:*:*:*:professional:*:*:*
3.0.12.42CPE matchmatch criteria
cpe:2.3:a:acti:nvr:3.0.12.42:*:*:*:standard:*:*:*

CVSS Data

CVSS version used by this source: 3.1

7.5HIGH

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

Attack Vector
NETWORK
Attack Complexity
LOW
Privileges Required
NONE
User Interaction
NONE
Scope
UNCHANGED
Confidentiality Impact
NONE
Integrity Impact
NONE
Availability Impact
HIGH
Exploitability Score
3.9
Impact Score
3.6
CvssVersion
3.1

Exploit Intelligence

EPSS Score
10.52%
Probability of exploitation in next 30 days
EPSS Percentile
95.3%
Percentile rank of EPSS score among Peer Group
As of 2026-07-27
Model: v2026.06.15
ExploitDB: EDB-48731 · Aug 5, 2020
This CVE's current EPSS score of 0.1052 is in the 93rd percentile among its peer group of 51,551 CVEs.

Social Chatter

The average CVE in this peer group has 0.0 Twitter, 0.0 Reddit, 0.1 Bluesky, 0.1 Mastodon, and 0.4 GitHub mentions.

Media Mentions

No media coverage found for this CVE.

The average CVE in this peer group has 0.1 InfoSec Media, 0.0 Vendor Blog, and 0.0 Security Researcher mentions.

Remediation

Remediation records are not available for this CVE.

References

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