CVE-2021-3297

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

CVSS v3.1

7.8 HIGHCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

CVSS v2.0

7.2 HIGHAV:L/AC:L/Au:N/C:C/I:C/A:C

EPSS

20.51% chance of exploitation in the next 30 days, 97th percentile

Nuclei

high · CWE-287

Published

2021-01-26

Updated

2025-11-25

Nuclei templates (1)

• projectdiscovery/nuclei-templates/blob/main/http/cves/2021/CVE-2021-3297.yaml

Exploit collections (2)

• tzwlhack/Vulnerability/blob/main/Zyxel%20NBG2105%20%E8%BA%AB%E4%BB%BD%E9%AA%8C%E8%AF%81%E…
• zan8in/afrog/blob/main/pocs/afrog-pocs/CVE/2021/CVE-2021-3297.yaml

References

• CVE Record
• NVD entry

Related

• CVE-2021-3294
• CVE-2021-3298
• CVE-2021-3293
• CVE-2021-33012
• CVE-2021-32924
• CVE-2021-33026