CVE-2025-63080

Authenticated command execution via unauthorized JSON-RPC operations

Published Aug 24, 2026 · Updated Aug 24, 2026

Incorrect authorization in KAON PG5298A before 3.0.82 and PG5298B before 4.0.82 allows remote authenticated users to execute commands. The JSON-RPC interface accepts crafted requests for privileged operations that the GUI does not expose, including system-file reads and command execution. Access requires a high-privilege account on an adjacent network and grants the ability to read router files or run commands with the firmware's privileges.

CVSS severity8.5
High
EPSS probability0.34%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Incorrect authorization in KAON PG5298A before 3.0.82 and PG5298B before 4.0.82 allows remote authenticated users to execute commands. The JSON-RPC interface accepts crafted requests for privileged operations that the GUI does not expose, including system-file reads and command execution. Access requires a high-privilege account on an adjacent network and grants the ability to read router files or run commands with the firmware's privileges.

The record

CVE
CVE-2025-63080
Published
Aug 24, 2026
Updated
Aug 24, 2026
Vendor
KAON Broadband
Product
PG5298A
Classifications
CWE-863, T1059, T1005
Attack vector
adjacent
Privileges
admin

Timeline

How it unfolded

  1. Aug 24, 2026CVE publishedPublication date reported by the CVE source.
  2. Aug 24, 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=0 <3.0.82

What conditions does exploitation require?

Attack vectoradjacent
Required privilegesadmin

What is affected?

KAON Broadband · PG5298Aversion=0 <3.0.82
KAON Broadband · PG5298Bversion=0 <4.0.82

Published CVSS scores

8.5CERT.PLCVSS:4.0/AV:A/AC:L/AT:N/PR:H/UI:N/VC:H/VI:H/VA:H/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.

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

No observations available

Sep 9, 2026Sep 15, 2026
Latest reporting daySep 15, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectoradjacent
Privilegesadmin
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-863Incorrect Authorization
T1059Command and Scripting Interpreter
T1005Data from Local System

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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