Vulnerability · Published Jan 26, 2021 · Assigned by mitre
CVE-2021-3297
High 7.8
In plain English
A high-severity security flaw in the affected software. There are no confirmed reports of exploitation so far. The chance it is exploited in the next 30 days is estimated at 20.5% (higher than 98% of all known vulnerabilities). Ready-made attack tooling exists: Nuclei.
Severity (CVSS NVD)7.8High
Exploit odds (30 days)20.5%top 2.5% of all CVEs
Exploited in the wildNo reportsnot in CISA KEV
Attack tooling1Nuclei
Official description
On Zyxel NBG2105 V1.00(AAGU.2)C0 devices, setting the login cookie to 1 provides administrator access.
Affected products (as reported)
References
- https://www.zyxel.com/us/en/support/security_advisories.shtml
- https://www.zyxel.com/support/SupportLandingSR.shtml?c=gb&l=en&kbid=M-01490&md=NBG2105
- https://github.com/nieldk/vulnerabilities/blob/main/zyxel%20nbg2105/Admin%20bypass
- https://codeberg.org/nieldk/vulnerabilities/src/branch/main/zyxel%20nbg2105/Admin%20bypass