CVE-2024-48539Public exploitNetwork attack vector

Firmware data exposure via hardcoded RC4 key

Published Oct 24, 2024 · Updated Jul 5, 2026

Hardcoded-key exposure in NetDVR Neye3C 4.5.2.0 allows attackers to read firmware metadata and forge update requests. UpdateFirmwareActivity2 passes a fixed RC4 key to Myhttp, exposing decrypted firmware URLs and parameters and permitting attacker-encrypted values. Extracting the shared key from the Android APK is sufficient to decrypt captured parameters and generate unauthorized firmware-file requests.

CVSS severity9.8
Critical
EPSS probability0.30%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Hardcoded-key exposure in NetDVR Neye3C 4.5.2.0 allows attackers to read firmware metadata and forge update requests. UpdateFirmwareActivity2 passes a fixed RC4 key to Myhttp, exposing decrypted firmware URLs and parameters and permitting attacker-encrypted values. Extracting the shared key from the Android APK is sufficient to decrypt captured parameters and generate unauthorized firmware-file requests.

The record

CVE
CVE-2024-48539
Published
Oct 24, 2024
Updated
Jul 5, 2026
Vendor
NetDVR
Product
Neye3C
Classifications
CWE-798, T1552.001
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Oct 24, 2024CVE publishedPublication date reported by the CVE source.
  2. Jul 5, 2026Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

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Is a vulnerable build present?

Compare these published version ranges with your installed build and any vendor patches.

  1. Affected versionversion=4.5.2.0

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

NetDVR · Neye3Cversion=4.5.2.0

Published CVSS scores

9.8CISA-ADPCVSS: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.

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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 exploitPublished

Weakness, pattern, technique

CWE-798Use of Hard-coded Credentials
T1552.001Unsecured Credentials: Credentials In Files

Public exploit references

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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