CVE-2021-4468Public exploitNetwork attack vector

Administrative credential disclosure via unauthenticated backup endpoint

Published Nov 14, 2025 · Updated Nov 14, 2025

Missing authentication in PLANEX CS-QP50F-ING2 firmware version 0 allows remote attackers to retrieve a configuration backup over HTTP. The /web/cgi-bin/hi3510/backup.cgi endpoint serves a gzip-compressed backup without verifying a session, and the archive contains administrative credentials. No authentication or user interaction is required; disclosed credentials grant administrative camera access and expose monitored-environment data.

CVSS severity8.7
High
EPSS probability0.65%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Missing authentication in PLANEX CS-QP50F-ING2 firmware version 0 allows remote attackers to retrieve a configuration backup over HTTP. The /web/cgi-bin/hi3510/backup.cgi endpoint serves a gzip-compressed backup without verifying a session, and the archive contains administrative credentials. No authentication or user interaction is required; disclosed credentials grant administrative camera access and expose monitored-environment data.

The record

CVE
CVE-2021-4468
Published
Nov 14, 2025
Updated
Nov 14, 2025
Vendor
PLANEX COMMUNICATIONS INC.
Product
CS-QP50F-ING2
Classifications
CWE-306, T1190, T1552.001
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Nov 14, 2025CVE publishedPublication date reported by the CVE source.
  2. Nov 14, 2025Record 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=0

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

PLANEX COMMUNICATIONS INC. · CS-QP50F-ING2version=0

Published CVSS scores

8.7VulnCheckCVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:N/VA:N/SC:N/SI:N/SA:N

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-306Missing Authentication for Critical Function
T1190Exploit Public-Facing Application
T1552.001Credentials 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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