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CVE-2021-3297

HIGH

7.8

Description

On Zyxel NBG2105 V1.00(AAGU.2)C0 devices, setting the login cookie to 1 provides administrator access.

CVE Details

CVSS v3.1 Score7.8

SeverityHIGH

CVSS VectorCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

Attack VectorLOCAL

ComplexityLOW

Privileges RequiredLOW

User InteractionNONE

Published1/26/2021

Last Modified11/25/2025

Sourcenvd

Honeypot Sightings0

Affected Products

zyxel:nbg2105zyxel:nbg2105_firmware

Weaknesses (CWE)

CWE-287

References

https://codeberg.org/nieldk/vulnerabilities/src/branch/main/zyxel%20nbg2105/Admin%20bypass(cve@mitre.org)

https://github.com/nieldk/vulnerabilities/blob/main/zyxel%20nbg2105/Admin%20bypass(cve@mitre.org)

https://www.zyxel.com/support/SupportLandingSR.shtml?c=gb&l=en&kbid=M-01490&md=NBG2105(cve@mitre.org)

https://www.zyxel.com/us/en/support/security_advisories.shtml(cve@mitre.org)

https://github.com/nieldk/vulnerabilities/blob/main/zyxel%20nbg2105/Admin%20bypass(af854a3a-2127-422b-91ae-364da2661108)

https://www.zyxel.com/support/SupportLandingSR.shtml?c=gb&l=en&kbid=M-01490&md=NBG2105(af854a3a-2127-422b-91ae-364da2661108)

https://www.zyxel.com/us/en/support/security_advisories.shtml(af854a3a-2127-422b-91ae-364da2661108)

IOC Correlations

No correlations recorded

This product uses data from the NVD API but is not endorsed or certified by the NVD.