CVE-2026-66372

Predictable Seed in Pseudo-Random Number Generator (PRNG) in Digital Watchdog VMAX DVR and NVR Product Lineups

High7.6EPSS 0.28%

Published: 15 Sept 2026
Updated: 17 Sept 2026
Reserved: 3 Aug 2026
Assigned by: icscert

Description

The affected products use insufficiently random values, which allows web session tokens to be predictable, bounding token entropy to the seed space.

Scores

CVSS scores of CVE-2026-66372, by who scored it
Scored by	CVSS	Score	Vector
icscertCNA (assigner)	4.0	High7.6	CVSS:4.0/AV:A/AC:H/AT:N/PR:N/UI:N/VC:H/VI:H/VA:N/SC:N/SI:N/SA:N
icscertCNA (assigner)	3.1	Medium6.8	CVSS:3.1/AV:A/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:N
NVDNVD · Awaiting Analysis	4.0	High7.6	CVSS:4.0/AV:A/AC:H/AT:N/PR:N/UI:N/VC:H/VI:H/VA:N/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X

EPSS (exploitation in 30 days): 0.28% · top 80% of all CVEs (6 Nov 2026)
CISA SSVC: Exploitation: none · Automatable: no · Technical impact: total

The list uses the assigner's score when there is one, then CISA's, then NVD's: High 7.6.

Weakness

CWE-337 Predictable seed in Pseudo-Random number generator (PRNG) (opens in a new tab)All about CWE-337 and its CVEs

Affected products

Digital Watchdog · VMAX A1 G4 DVR
- affected All
Digital Watchdog · VMAX IP G4 NVR
- affected All
Digital Watchdog · VMAX A1 PLUS
- affected All
Digital Watchdog · VA1G4 Recorder
- affected All
Digital Watchdog · VG4 Recorder
- affected All

What to do

Solution: Digital Watchdog has released updated firmware for the affected products. Users should download and install the updated firmware for their model at: https://digital-watchdog.com/downloads/

References (3)

Sources

The same CVE in the primary databases and aggregators, to check against.

Badge for a README or a ticket

[![CVE-2026-66372](https://trackcve.app/badge/CVE-2026-66372.svg)](https://trackcve.app/cve/CVE-2026-66372)

Record last updated 17 Sept 2026, 18:46 UTC.