CVE-2026-6017 PUBLISHED

Missing Authentication for Critical Function in KAON PG5298

Assigner: CERT-PL
Reserved: 09.04.2026 Published: 24.08.2026 Updated: 24.08.2026

Firmware in KAON PG5298A and PG5298B routers allow an unauthenticated user to query a specific endpoint and acquire sensitive information such as a password to the administrative portal. This vulnerability has been fixed in firmware version: 3.0.82 for PG5298A and 4.0.82 for PG5298B.

Metrics

CVSS 4.0

CVSS Vector: CVSS:4.0/AV:A/AC:L/AT:N/PR:N/UI:N/VC:H/VI:N/VA:N/SC:N/SI:N/SA:N
CVSS Score: 7.1

Exploitability Metrics		Vulnerable System Impact Metrics		Subsequent System Impact Metrics
Attack Vector	Adjacent	Confidentiality	High	Confidentiality	None
Attack Complexity	Low	Integrity	None	Integrity	None
Attack Requirements	None	Availability	None	Availability	None
Privileges Required	None
User Interaction	None

CVSS 4.0

Product Status

Vendor	KAON
Product	PG5298A
Versions	Default: unaffected affected from 0 to 3.0.82 (excl.)

Vendor	KAON
Product	PG5298B
Versions	Default: unaffected affected from 0 to 4.0.82 (excl.)

Credits

Mikołaj Pisula finder

References

https://cert.pl/en/posts/2026/08/CVE-2025-63080/

Problem Types

CWE-306 Missing Authentication for Critical Function CWE