CVE-2021-41987

CVE Enrichment

CVSS: 8.1 HIGH
EPSS: 16.23%
EPSS Percentile: 96.92%
CISA KEV: Not listed

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.

Technical Details

CVSS Version: 3.1
CNA / NVD Source: [email protected]
Published: 16-Mar-2022 22:15
Last Modified: 17-Jun-2026 11:09
EPSS Date: 2026-10-20
CWE: CWE-787

CVSS Vector


            CVSS:3.1                            AV:N /
                            AC:H /
                            PR:N /
                            UI:N /
                            S:U /
                            C:H /
                            I:H /
                            A:H

Affected Products / Versions

mikrotik / routeros
Version / affected range: 6.46.8
cpe:2.3:o:mikrotik:routeros:6.46.8:*:*:*:*:*:*:*
mikrotik / routeros
Version / affected range: 6.47.9
cpe:2.3:o:mikrotik:routeros:6.47.9:*:*:*:*:*:*:*
mikrotik / routeros
Version / affected range: 6.47.10
cpe:2.3:o:mikrotik:routeros:6.47.10:*:*:*:*:*:*:*

References

Last enrichment sync: 21-Oct-2026 07:19
Sources: NVD · FIRST EPSS · CISA KEV
Latest successful provider update; providers refresh independently.

Reported Context (1)

failure in the capture. It deserves its own writeup, so we cover it briefly here. The target was CVE-2021-41987, a heap overflow in the RouterOS SCEP service, on a device running an affected version. The operator Research Details Graylog Log4Shell Activity Against Ukrainian Data-Exchange Systems

CVE (1)

MITRE ATT&CK (8)

Vendors (1)

Products (7)

Tools (2)

Industries (1)

Countries (1)

Note: Related entities, including threat actors, malware, CVEs, MITRE ATT&CK techniques, vendors, products, tools, countries, and industries, are shown when they appear in the same reporting. Their presence does not necessarily mean they were targeted, compromised, vulnerable, responsible for the activity, or directly involved in the incident.