CVE-2019-10631
Shell Metacharacter Injection in the package installer on Zyxel NAS 326 version 5.21 and below allows an authenticated attacker to execute arbitrary code via multiple different requests.
Does this matter?
High impact if exploited, but EPSS currently rates exploitation as unlikely (2.25%). Schedule it in the normal patch cycle and watch for a rise in EPSS or a public exploit.
Description
Shell Metacharacter Injection in the package installer on Zyxel NAS 326 version 5.21 and below allows an authenticated attacker to execute arbitrary code via multiple different requests.
- CVSS 3.0
- 8.8 HIGHCVSS:3.0/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
- EPSS
- 2.25% probability · 83th percentile
- Public exploits
- None in Exploit-DB
- CISA KEV
- Not listed
- Weakness
- CWE-78
- Affected
- zyxel/nas326 firmware
- Source
- cve@mitre.org
EPSS 2.2% since 27 October 2026; no change recorded yet. Points are recorded when the score first appears and whenever it moves by a percentage point or more.
References
- http://maxwelldulin.com/BlogPost?post=3236967424Exploit, Third Party Advisory
- http://maxwelldulin.com/BlogPost?post=3236967424Exploit, Third Party Advisory
Source: NVD record, EPSS from FIRST.org, KEV from CISA, exploits from Exploit-DB. Refreshed daily. Download this record as JSON.