CVE-2021-41987
In the SCEP Server of RouterOS in certain Mikrotik products, an attacker can trigger a heap-based...
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.
Attack profile
How easy it is to exploit
- Attack vector
- Network
- Complexity
- High
- Privileges needed
- None
- User interaction
- None
What an attacker can affect
- Confidentiality
- High
- Integrity
- High
- Availability
- High
Exploit likelihood
What each source reports
NVD Score used
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.
- Record
CVE-2021-41987- CVSS 3.1
- 8.1 High
CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H - CVSS 2.0
- 6.8 Medium
AV:N/AC:M/Au:N/C:P/I:P/A:P - Weakness
- CWE-787
- Updated
- 2026-11-02
CVE List No score
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.
- Record
CVE-2021-41987- Updated
- 2026-11-02
EUVDEUVD-2021-28977 No score
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.
- Record
EUVD-2021-28977- Updated
- 2026-11-03
GitHub AdvisoriesGHSA-5vgw-w2rf-gwww
In the SCEP Server of RouterOS in certain Mikrotik products, an attacker can trigger a heap-based...
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 control the SCEP server for a valid certificate. This affects mikrotik-vm-6.46, mikrotik-vm-6.46.8, mikrotik-tile-6.46.8, mikrotik-6.47.9, and mikrotik-6.47.10.
- Record
GHSA-5vgw-w2rf-gwww- CVSS 3.1
- 8.1 High
CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H - Weakness
- CWE-787
- Updated
- 2026-11-02
Affected products
History
| Recorded | Changed | Sources |
|---|---|---|
| aliases | EUVD | |
| first indexed | CVE List, GitHub Advisories, NVD |
Dates are when Every CVE recorded each change. Upstream dates may differ.
In short
CVE-2021-41987 is a high vulnerability (CVSS 8.1) in Mikrotik Routeros, published March 16, 2022. No source lists public exploit code. EPSS puts the chance of exploitation in the next 30 days at 16.2%, the 96th percentile. No source names a fixed version.