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CVE-2020-6959

28
FAUCET Score

CVE-2020-6959 is a critical vulnerability affecting multiple versions of Honeywell MAXPRO VMS and NVR products, stemming from unsafe deserialization of untrusted data. This allows an unauthenticated attacker to remotely execute arbitrary code by sending a specially crafted web request, leading to complete compromise of confidentiality, integrity, and availability. With a CVSS score of 9.8, it represents a severe risk due to its network-based attack vector and low attack complexity. While there is no known active exploitation or public exploit code (Metasploit, Nuclei, ExploitDB), the vulnerability has garnered significant community discussion and media coverage, indicating awareness within the security community.

Impacted Technologies

VendorProductVersion(s)CPE
<= 5.6CPE matchmatch criteria
cpe:2.3:o:honeywell:maxpro_nvr_xe_firmware:*:*:*:*:*:*:*:*
<= 5.6CPE matchmatch criteria
cpe:2.3:o:honeywell:maxpro_nvr_se_firmware:*:*:*:*:*:*:*:*
<= 5.6CPE matchmatch criteria
cpe:2.3:o:honeywell:maxpro_nvr_pe_firmware:*:*:*:*:*:*:*:*
<= 5.6CPE matchmatch criteria
cpe:2.3:o:honeywell:mpnvrswxx_firmware:*:*:*:*:*:*:*:*
<= vms560CPE matchmatch criteria
cpe:2.3:o:honeywell:hnmswvms_firmware:*:*:*:*:*:*:*:*

CVSS Data

CVSS version used by this source: 3.1

9.8CRITICAL

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

Attack Vector
NETWORK
Attack Complexity
LOW
Privileges Required
NONE
User Interaction
NONE
Scope
UNCHANGED
Confidentiality Impact
HIGH
Integrity Impact
HIGH
Availability Impact
HIGH
Exploitability Score
3.9
Impact Score
5.9
CvssVersion
3.1

Exploit Intelligence

EPSS Score
2.21%
Probability of exploitation in next 30 days
EPSS Percentile
80.7%
Percentile rank of EPSS score among Peer Group
As of 2026-07-27
Model: v2026.06.15
This CVE's current EPSS score of 0.0221 is in the 70th percentile among its peer group of 36,897 CVEs.

Social Chatter

The average CVE in this peer group has 0.0 Twitter, 0.1 Reddit, 0.3 Bluesky, 0.3 Mastodon, and 2.4 GitHub mentions.

Media Mentions

The average CVE in this peer group has 0.3 InfoSec Media, 0.0 Vendor Blog, and 0.0 Security Researcher mentions.

Remediation

Patch Available

Vendor Patches (1)

coollabspatch availablevia llm_extracted

Vendor Advisories (1)

coollabsllm-coollabs-5dffc1a662b6eccdHIGH

Unauthenticated RCE via unsafe binary deserialization and Unauthenticated Remote arbitrary SQL command injection

Oct 25, 2019

References

us-cert.gov / ics/advisories/icsa-20-021-01
Third Party AdvisoryUS Government Resource