CVE-2021-41987 Memory corruption in n/a
An attacker can achieve remote code execution via a heap-based buffer overflow in the SCEP Server, requiring knowledge of the server name.
- 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-2021-41987?
CVE-2021-41987 is a high-severity memory corruption vulnerability in Mikrotik Routeros, published on 16 Mar 2022. An attacker can exploit it over the internet without logging in, with no action from the victim.
Official description
In the SCEP Server of RouterOS in certain Mikrotik products, an attacker can trigger a heap-based buffer overflow that leads to remote code execution. The attacker must know the scep_server_name value. This affects RouterOS 6.46.8, 6.47.9, and 6.47.10.
Weakness: CWE-787
Which versions are affected by CVE-2021-41987?
It affects 1 product.
Products include Mikrotik Routeros.
How do I fix CVE-2021-41987?
No fix has been published for CVE-2021-41987 yet. Limit exposure of the affected software until one is available.
Upgrade to the fixed version. Memory-safe languages, compiler hardening and fuzzing prevent most new cases. More about Memory corruption.
Is CVE-2021-41987 being exploited?
There is no known exploitation of CVE-2021-41987 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-5vgw-w2rf-gwww.