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Fencer Vulns
medium 6.8

CVE-2026-66372 json

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

published 2026-09-15 54 d ago modified 2026-09-18 51 d ago also EUVD-2026-79953

cvss
6.8
version 3.1, CNA
cisa kev
Not listed
not in CISA's catalog
epss
0.3%
EPSS 0.3% chance of exploitation in 30 days, percentile 20%
public exploits
0
none known

Summary

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

Vendor advisories

What the vendors themselves say about their products: affected, fixed or not affected, and what to do.

cisa ICSA-26-258-01 updated cvss 6.8

Digital Watchdog VMAX DVR and NVR Product Lineups

  • Digital Watchdog VA1G4 Recorder Digital Watchdog VG4 Recorder Digital Watchdog VMAX A1 G4 DVRs Digital Watchdog VMAX A1 PLUS Digital Watchdog VMAX IP G4 NVRs
    affected: mitigation “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/.” digital-watchdog.com

From CISA ICS and IT advisories (CSAF, https://github.com/cisagov/CSAF), a U.S. Government work; changed: reduced to products, statuses and remediations. CISA notification · csaf

CISA SSVC

Exploitation
none
Automatable
no
Technical impact
total
Assessed
52 d ago

Exploit prediction

0.28% chance of exploitation in the next 30 days, higher than 20% of all scored CVEs (FIRST EPSS, 2026-11-08).

CVSS scores

assigned by version score vector
CNA 3.1 6.8 CVSS:3.1/AV:A/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:N
CNA 4.0 7.6 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
CNA 4.0 7.6 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

Affected products

  • Digital Watchdog VMAX A1 G4 DVR
  • Digital Watchdog VMAX IP G4 NVR
  • Digital Watchdog VMAX A1 PLUS
  • Digital Watchdog VA1G4 Recorder
  • Digital Watchdog VG4 Recorder

Classification

Weakness
  • CWE-337 Predictable Seed in Pseudo-Random Number Generator (PRNG)

References

Sources

Fencer Vulns keeps one entry per vulnerability: the CVE id wins, then GHSA, and records that alias each other are merged, except that two CVEs always keep separate entries. The same data is available as JSON.