CVE-2020-6959
highpriority · track · 40EPSS 0.022 · 83 %ileEUUSEPSS · scored 2026-10-27
The following versions of MAXPRO VMS and NVR, MAXPRO VMS:HNMSWVMS prior to Version VMS560 Build 595 T2-Patch, HNMSWVMSLT prior to Version VMS560 Build 595 T2-Patch, MAXPRO NVR: MAXPRO NVR XE prior to Version NVR 5.6 Build 595 T2-Patch, MAXPRO NVR SE prior to Version NVR 5.6 Build 595 T2-Patch, MAXPRO NVR PE prior to Version NVR 5.6 Build 595 T2-Patch, and MPNVRSWXX prior to Version NVR 5.6 Build 595 T2-Patch are vulnerable to an unsafe deserialization of untrusted data. An attacker may be able to remotely modify deserialized data without authentication using a specially crafted web request, resulting in remote code execution.
remediations
Vendor fix, mitigation, or workaround guidance, as published by each source.
No vendor fix yet; a mitigation is available.
- MitigationHNMSWVMScisa_csaf_ot
As a best practice, Honeywell recommends users isolate their systems from the Internet or create additional layers of defense by placing the affected hardware behind a firewall or into a DMZ; and if remote connections to the network are required, consider using a VPN or other means to ensure secure remote connections into the network where the device is located.
- MitigationHNMSWVMSLTcisa_csaf_ot
As a best practice, Honeywell recommends users isolate their systems from the Internet or create additional layers of defense by placing the affected hardware behind a firewall or into a DMZ; and if remote connections to the network are required, consider using a VPN or other means to ensure secure remote connections into the network where the device is located.
- MitigationMAXPRO NVR PEcisa_csaf_ot
As a best practice, Honeywell recommends users isolate their systems from the Internet or create additional layers of defense by placing the affected hardware behind a firewall or into a DMZ; and if remote connections to the network are required, consider using a VPN or other means to ensure secure remote connections into the network where the device is located.
- MitigationMAXPRO NVR SEcisa_csaf_ot
As a best practice, Honeywell recommends users isolate their systems from the Internet or create additional layers of defense by placing the affected hardware behind a firewall or into a DMZ; and if remote connections to the network are required, consider using a VPN or other means to ensure secure remote connections into the network where the device is located.
- MitigationMAXPRO NVR XEcisa_csaf_ot
As a best practice, Honeywell recommends users isolate their systems from the Internet or create additional layers of defense by placing the affected hardware behind a firewall or into a DMZ; and if remote connections to the network are required, consider using a VPN or other means to ensure secure remote connections into the network where the device is located.
- MitigationMPNVRSWXXcisa_csaf_ot
As a best practice, Honeywell recommends users isolate their systems from the Internet or create additional layers of defense by placing the affected hardware behind a firewall or into a DMZ; and if remote connections to the network are required, consider using a VPN or other means to ensure secure remote connections into the network where the device is located.
cvss
Technical severity, 0–10. One row per scoring source.
base score 0–10 · higher = more severe · hover a vector to decode⚠ sources disagree · high–critical · 7.5–9.8
weaknesses
The CWE weakness classes this flaw belongs to.
affected products (19)
Products and version ranges known to be affected.
- n/a Honeywell Maxpro VMS & NVR≤ The following versions of MAXPRO VMS and NVR, MAXPRO VMS:HNMSWVMS prior to Version VMS560 Build 595 T2-Patch, HNMSWVMSLT prior to Version VMS560 Build 595 T2-Patch, MAXPRO NVR: MAXPRO NVR XE prior to Version NVR 5.6 Build 595 T2-Patch, MAXPRO NVR SE prior to Version NVR 5.6 Build 595 T2-Patch, MAXPRO NVR PE prior to Version NVR 5.6 Build 595 T2-Patch, MPNVRSWXX prior to Version NVR 5.6 Build 595 T2-Patchenisa_euvdEU
- honeywell maxpro nvr pe firmware≤ 5.6nvdUScpe:2.3:o:honeywell:maxpro_nvr_pe_firmware:*:*:*:*:*:*:*:*
- honeywell maxpro nvr se firmware≤ 5.6nvdUScpe:2.3:o:honeywell:maxpro_nvr_se_firmware:*:*:*:*:*:*:*:*
- honeywell maxpro nvr xe firmware≤ 5.6nvdUScpe:2.3:o:honeywell:maxpro_nvr_xe_firmware:*:*:*:*:*:*:*:*
advisories (1)
Vendor and ecosystem advisories describing this.
- ICSA-20-021-01ICSA-20-021-01_Honeywell Maxpro VMS & NVR2020-01-21icsa · cisa_csaf_otUS
Joachim Kerschbaumer discovered these vulnerabilities; Honeywell reported these vulnerabilities to CISA.
also known as (3)
Other names and identifiers for this entity.
sources
Which sources assert this record, and when.
references (6)
External citations — patches, advisories, analysis.
- https://nvd.nist.gov/vuln/detail/CVE-2020-6959cnnvd
- https://www.auscert.org.au/bulletins/ESB-2020.0265/cnnvd
- https://www.honeywell.comPatchcnnvd
- https://www.us-cert.gov/ics/advisories/icsa-20-021-01cnnvd
- https://www.us-cert.gov/ics/advisories/icsa-20-021-01enisa_euvd
- https://www.us-cert.gov/ics/advisories/icsa-20-021-01Third Party AdvisoryUS Government Resourcenvd
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