CVE-2021-3297

moderate-risk
Published 2021-01-26

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

Do I need to act?

!
80.5% chance of exploitation in next 30 days
EPSS score — higher than 19% of all CVEs
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Not on CISA KEV list
No confirmed active exploitation reported to CISA
?
Patch status unknown
Check vendor advisories for fix availability and mitigation guidance
7
CVSS 7.8/10 High
LOCAL / LOW complexity

Affected Products (1)

Affected Vendors

Zyxel

References (7)

https://codeberg.org/nieldk/vulnerabilities/src/branch/main/zyxel%20nbg2105/Admi...
Exploit https://github.com/nieldk/vulnerabilities/blob/main/zyxel%20nbg2105/Admin%20bypa...
Product https://www.zyxel.com/support/SupportLandingSR.shtml?c=gb&l=en&kbid=M-01490&md=N...
Vendor Advisory https://www.zyxel.com/us/en/support/security_advisories.shtml
Exploit https://github.com/nieldk/vulnerabilities/blob/main/zyxel%20nbg2105/Admin%20bypa...
Product https://www.zyxel.com/support/SupportLandingSR.shtml?c=gb&l=en&kbid=M-01490&md=N...
Vendor Advisory https://www.zyxel.com/us/en/support/security_advisories.shtml
49
/ 100
moderate-risk
Severity 24/34 · High
Exploitability 20/34 · Moderate
Exposure 5/34 · Minimal