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Fencer Vulns
high 7.2

CVE-2020-9499 json

Some Dahua products have buffer overflow vulnerabilities.

published 2020-04-09 6 y ago modified 2026-06-17 4 mo ago also EUVD-2020-30305

cvss
7.2
version 3.1, NVD
cisa kev
Not listed
not in CISA's catalog
epss
1.5%
EPSS 1.5% chance of exploitation in 30 days, percentile 74%
public exploits
0
none known

Summary

Some Dahua products have buffer overflow vulnerabilities. After the successful login of the legal account, the attacker sends a specific DDNS test command, which may cause the device to go down.

Patch / fix

  • dahuasecurity sd6al_firmware 2019-12
  • dahuasecurity sd5a_firmware 2019-12
  • dahuasecurity sd1a_firmware 2019-12
  • dahuasecurity ptz1a_firmware 2019-12
  • dahuasecurity sd50_firmware 2019-12
  • dahuasecurity sd52c_firmware 2019-12
  • dahuasecurity ipc-hx5842h_firmware 2019-12
  • dahuasecurity ipc-hx7842h_firmware 2019-12
  • dahuasecurity ipc-hx2xxx_firmware 2019-12
  • dahuasecurity ipc-hxxx5x4x_firmware 2019-12
  • dahuasecurity n42b1p_firmware 2019-12
  • dahuasecurity n42b2p_firmware 2019-12
  • dahuasecurity n42b3p_firmware 2019-12
  • dahuasecurity n52a4p_firmware 2019-12
  • dahuasecurity n54a4p_firmware 2019-12
  • dahuasecurity n52b2p_firmware 2019-12
  • dahuasecurity n52b5p_firmware 2019-12
  • dahuasecurity n52b3p_firmware 2019-12
  • dahuasecurity n54b2p_firmware 2019-12

Exploit prediction

1.50% chance of exploitation in the next 30 days, higher than 74% of all scored CVEs (FIRST EPSS, 2026-11-08).

CVSS scores

assigned by version score vector
NVD 3.1 7.2 CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:H
NVD 2.0 6.5 AV:N/AC:L/Au:S/C:P/I:P/A:P

Affected products

  • n/a IPC-HX2XXX Series,IPC-HXXX5X4X Series,IPC-HX5842H,IPC-HX7842H,NVR 5x Series,NVR 4x Series,SD6AL Series,SD5A Series,SD1A Series,PTZ1A Series,SD50/52C Series

Classification

Weakness
  • CWE-120 Buffer Copy without Checking Size of Input

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.