CVE-2020-9502Network attack vector

Session hijacking via predictable session identifiers

Published May 13, 2020 · Updated Aug 4, 2024

Session hijacking in Dahua cameras and recorders built before December 2019 allows remote attackers to take over sessions via predicted IDs. The binary P2P service on TCP port 37777 generates predictable session identifiers that a forged packet can reuse without the victim's credentials. Exploitation requires an active user session and interaction, and successful hijacking grants the device actions available through ConfigTool.

CVSS severity8.8
High
EPSS probability1.49%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Session hijacking in Dahua cameras and recorders built before December 2019 allows remote attackers to take over sessions via predicted IDs. The binary P2P service on TCP port 37777 generates predictable session identifiers that a forged packet can reuse without the victim's credentials. Exploitation requires an active user session and interaction, and successful hijacking grants the device actions available through ConfigTool.

The record

CVE
CVE-2020-9502
Published
May 13, 2020
Updated
Aug 4, 2024
Vendor
Unknown vendor
Product
Unknown product
Classifications
CWE-330, CAPEC-593, T1563
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. May 13, 2020CVE publishedPublication date reported by the CVE source.
  2. Aug 4, 2024Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

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Is a vulnerable build present?

Affected buildAffected product and version details are unavailable.

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

Affected products and versions are unavailable in this record.

Published CVSS scores

8.8Dahua TechnologyCVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H
7.5National Vulnerability DatabaseAV:N/AC:L/Au:N/C:P/I:P/A:P
7.9Dahua TechnologyCVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H/E:P/RL:O/RC:C
9.8National Vulnerability DatabaseCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.

Daily unique IPsNo honeypot observations are available for this CVE in the selected window.

No observations available

Sep 10, 2026Sep 16, 2026
Latest reporting daySep 16, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-330Use of Insufficiently Random Values
CAPEC-593Session Hijacking
T1563Remote Service Session Hijacking

Public exploit references

No public exploit references are available in this record.

Labels summarize the accepted research assessment. They do not indicate a test against your environment.

Technologies

Your stack

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Your stack

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