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CVE-2020-9502· NVD / CVE Program· CNA dahua

Some Dahua products with Build time before December 2019 have Session ID predictable vulnerabilities.

Some Dahua products with Build time before December 2019 have Session ID predictable vulnerabilities. During normal user access, an attacker can use the predicted Session ID to construct a data packet to attack the device.

CriticalCVSS 9.8 · v3.1—No exploit No fix recorded
Published
May 13, 2020
Updated
Jun 16, 2026
EPSS
1.5% · 74th percentile
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JSON

Action score

39

Monitor

Low priority for now.

CVSS
39 / 40 · 9.8 / 10
CISA KEV
0 / 30 · Not listed
EPSS
0 / 30 · 1.5%

Affected systems

VendorProduct
dahuasecuritysd6al firmware
dahuasecuritysd6al
dahuasecuritysd5a firmware
dahuasecuritysd5a
dahuasecuritysd1a firmware
dahuasecuritysd1a
dahuasecurityptz1a firmware
dahuasecurityptz1a
dahuasecuritysd50 firmware
dahuasecuritysd50
dahuasecuritysd52c firmware
dahuasecuritysd52c

and 28 more

Affected versions

NVD version ranges (for catalog products). Add the product to your stack with a version and matching uses these.

  • dahuasecurity ipc-hdbw1320e-w firmwarebefore 2019-12
  • dahuasecurity ipc-hx2xxx firmwarebefore 2019-12
  • dahuasecurity ipc-hx5842h firmwarebefore 2019-12
  • dahuasecurity ipc-hx7842h firmwarebefore 2019-12
  • dahuasecurity ipc-hxxx5x4x firmwarebefore 2019-12
  • dahuasecurity n42b1p firmwarebefore 2019-12
  • dahuasecurity n42b2p firmwarebefore 2019-12
  • dahuasecurity n42b3p firmwarebefore 2019-12
  • dahuasecurity n52a4p firmwarebefore 2019-12
  • dahuasecurity n52b2p firmwarebefore 2019-12
  • dahuasecurity n52b3p firmwarebefore 2019-12
  • dahuasecurity n52b5p firmwarebefore 2019-12
  • dahuasecurity n54a4p firmwarebefore 2019-12
  • dahuasecurity n54b2p firmwarebefore 2019-12
  • dahuasecurity ptz1a firmwarebefore 2019-12
  • dahuasecurity sd1a firmwarebefore 2019-12
  • dahuasecurity sd50 firmwarebefore 2019-12
  • dahuasecurity sd52c firmwarebefore 2019-12
  • dahuasecurity sd5a firmwarebefore 2019-12
  • dahuasecurity sd6al firmwarebefore 2019-12

Versions reported by the vendor

Affected version ranges reported by the assigning authority (dahua). Independent of NVD's CPE analysis and usually ahead of it.

  • 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,IPC-HFW1431S

    • Versions which Build time before December,2019affected

Same product

dahuasecurity: all records

Other highest-scoring records for the same primary product.

  • CVE-2019-9682Dahua devices with Build time before December 2019 use strong security login mode by default, but in order to be compatible with the normal
    32Monitor

Remediation

Which version to upgrade to

Fix versions compiled from the vendor, package registries and Microsoft. Verify the vendor's note before upgrading.

No fix version is recorded for this entry. Check the references for vendor advisories.

Exploit status

No known public exploit

No public exploit has been observed yet. That doesn't mean you're safe, only that the bar is a little higher.

Research context

For pentesters and researchers: attack profile, score disagreement, timeline, patch commits, credits, variant and chain candidates, bug bounty scope. All derived from existing data; no exploit code.

Timeline

From publication to today: proof of concept, Metasploit module, CISA KEV and fix record. Dates are as reported by the sources.

No dated events beyond publication.

EPSS, last 120 days

FIRST EPSS daily score; only changes of 0.01 or more are recorded (step chart).

Patch and commit links

Commit, PR and diff links among the references. A starting point for patch-diffing and variant hunting; fixes, not exploits.

No commit or PR link among the references.

Credits

All researchers

Finders, reporters and analysts named in the CNA record. Click a name for that researcher’s other records.

No credits in the CNA record.

Variant candidates

Same product, same weakness class, within 18 months. If the patch missed the root cause, the sibling bug is here.

No nightly-computed relations.

Chain candidates

An authentication bypass and a privilege-requiring bug in the same product, published close together: combined they may become an unauthenticated path.

—

Bug bounty scope

No known public program.

Source: bounty-targets-data (public HackerOne, Bugcrowd, Intigriti, YesWeHack listings).

Technical details

Attack conditions

  • Anyone who can reach it over the internet can trigger it.
  • No account or password is required.
  • No user action is required.
  • No special conditions are required; it is repeatable.

If successful

Confidentiality
high · data can be read
Integrity
high · data or configuration can be modified
Availability
high · the service can be disrupted
Attack vector
Network
Attack complexity
Low
Privileges required
None
User interaction
None
Scope
Unchanged
Confidentiality impact
High
Integrity impact
High
Availability impact
High

Weakness class (CWE)

CWE-330 · Use of Insufficiently Random Values

CVSS vector

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

nvd-primary

Attack context

MITRE CAPEC attack patterns and ATT&CK techniques for this weakness class (CWE). A starting point for detection rules and threat hunting.

Noroxi analysis

No Noroxi analysis for this record yet

We don't hand-write analysis for all 385,000+ vulnerabilities; that wouldn't be honest. For notable, high-impact vulnerabilities our team writes the mechanism, detection and remediation steps.

We use this product, ask for help

Change log

No changes recorded on tracked fields yet. Score, KEV, exploit maturity and fix status changes appear here.

References

Vendor advisories and official records. Exploit/PoC links are deliberately left out.

All records