CVE-2020-22844 Denial of service in n/a
Unauthenticated attackers can cause a denial of service on Mikrotik RouterOS devices by sending crafted SMB requests.
- Exploited in the wild
- Not known
- Login needed
- Not needed
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- None listed
What is CVE-2020-22844?
CVE-2020-22844 is a high-severity denial of service vulnerability in Mikrotik Routeros, published on 28 Feb 2022. An attacker can exploit it over the internet without logging in, with no action from the victim.
Official description
A buffer overflow in Mikrotik RouterOS 6.47 allows unauthenticated attackers to cause a denial of service (DOS) via crafted SMB requests.
Weakness: CWE-401
Which versions are affected by CVE-2020-22844?
It affects 1 product.
Products include Mikrotik Routeros.
How do I fix CVE-2020-22844?
No fix has been published for CVE-2020-22844 yet. Limit exposure of the affected software until one is available.
Upgrade, then put limits on request size, rate and nesting depth so one client cannot exhaust the service. More about Denial of service.
Is CVE-2020-22844 being exploited?
There is no known exploitation of CVE-2020-22844 in the wild and no public exploit code.
Other vulnerabilities in Mikrotik Routeros
- CVE-2018-7445 MikroTik RouterOS Stack-Based Buffer Overflow
- CVE-2026-86060 MikroTik RouterOS Improper Neutralization of Argument Delimiters in a Command
- CVE-2018-14847 MikroTik Router OS Directory Traversal
- CVE-2026-67277 MikroTik RouterOS Missing Authentication for Critical Function
- CVE-2026-67279 Mikrotik RouterOS Improper Enforcement of Behavioral Workflow
Sources
Also known as GHSA-767r-m8m9-rf56.