CVE-2020-14021

Severity: medium (CVSS 4.9 v3.1)
Exploited in the wild: not listed in CISA KEV
EPSS: 1.1% probability of exploitation in the next 30 days
Public exploit or detection template: yes
Published: 2020-09-18 · updated 2026-06-17

Description

An issue was discovered in Ozeki NG SMS Gateway through 4.17.6. The ASP.net SMS module can be used to read and validate the source code of ASP files. By altering the path, it can be made to read any file on the Operating System, usually with NT AUTHORITY\SYSTEM privileges.

Affected products

Ozeki Ng Sms Gateway: through 4.17.6

References

https://github.com/DrunkenShells/Disclosures/tree/master/CVE-2020-14021-Arbitrary%20File%20Read-Ozeki%20SMS%20Gateway
https://www.ozeki.hu/index.php?ow_page_number=1017&downloadaction=email&download_product_id=1&os=windows&dpath=%2Fattachments%2F702%2Finstallwindows_1590575794_OzekiNG-SMS-Gateway_4.17.6.zip&dname=Ozeki+NG+SMS+Gateway+v4.17.6&dsize=+%2817.8+MB%29&platform=Windows
https://www.ozeki.hu/index.php?owpn=231
https://github.com/DrunkenShells/Disclosures/tree/master/CVE-2020-14021-Arbitrary%20File%20Read-Ozeki%20SMS%20Gateway
https://www.ozeki.hu/index.php?ow_page_number=1017&downloadaction=email&download_product_id=1&os=windows&dpath=%2Fattachments%2F702%2Finstallwindows_1590575794_OzekiNG-SMS-Gateway_4.17.6.zip&dname=Ozeki+NG+SMS+Gateway+v4.17.6&dsize=+%2817.8+MB%29&platform=Windows
https://www.ozeki.hu/index.php?owpn=231

Get alerted when CVE-2020-14021 or the next vulnerability affects your stack