Vulnerability · Published Dec 28, 2021 · Assigned by Zyxel
CVE-2021-35031
Medium 6.8
In plain English
A medium-severity OS command injection in GS1900 series firmware from Zyxel. There are no confirmed reports of exploitation so far. The chance it is exploited in the next 30 days is estimated at 0.5% (higher than 41% of all known vulnerabilities).
Severity (CVSS 3.1)6.8Medium
Exploit odds (30 days)0.5%top 58.5% of all CVEs
Exploited in the wildNo reportsnot in CISA KEV
Attack toolingNoneno public tooling known
Official description
A vulnerability in the TFTP client of Zyxel GS1900 series firmware, XGS1210 series firmware, and XGS1250 series firmware, which could allow an authenticated LAN user to execute arbitrary OS commands via the GUI of the vulnerable device.
Affected products (as reported)
| Vendor | Product | Versions |
|---|---|---|
| Zyxel | GS1900 series firmware | 2.60 |
| Zyxel | XGS1210 series firmware | 1.00(ABTY.4)C0 |
| Zyxel | XGS1250 series firmware | 1.00(ABWE.0)C0 |
Weakness: CWE-78 · Vector: CVSS:3.1/AV:A/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:H