CVE-2021-26608 handysoft groupware arbitrary file download and execution vulnerability
Attackers can exploit missing integrity checks in the HShell.dll ActiveX module to download and execute arbitrary files, leading to code execution.
- Exploited in the wild
- Not known
- Login needed
- Not needed
- Attackable
- Over the internet
- Victim action needed
- A user has to click or open something
- Fix
- None listed
What is CVE-2021-26608?
CVE-2021-26608 is a high-severity code injection vulnerability in handysoft HShell.dll, published on 9 Sep 2021. An attacker can exploit it over the internet without logging in, and only if a user opens a file or follows a link.
Official description
An arbitrary file download and execution vulnerability was found in the HShell.dll of handysoft Co., Ltd groupware ActiveX module. This issue is due to missing support for integrity check of download URL or downloaded file hash.
Which versions are affected by CVE-2021-26608?
It affects 1 product.
Products include Handysoft Hshell.
How do I fix CVE-2021-26608?
No fix has been published for CVE-2021-26608 yet. Limit exposure of the affected software until one is available.
Upgrade, and never evaluate templates, expressions or code built from user input. More about Code injection.
Is CVE-2021-26608 being exploited?
There is no known exploitation of CVE-2021-26608 in the wild and no public exploit code.
Sources
Also known as GHSA-744f-76g7-h835.