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Fencer Intel
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 last mo. modified last mo. 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.

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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
last mo.

Exploit prediction

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

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 Intel 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.