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CVE-2021-41987

33
FAUCET Score

CVE-2021-41987 is a heap-based buffer overflow vulnerability in the SCEP Server component of Mikrotik RouterOS versions 6.46.8, 6.47.9, and 6.47.10, allowing for remote code execution. This high-severity flaw (CVSS 8.1) requires an attacker to know the scep_server_name value, but otherwise has low attack complexity and no user interaction. While its EPSS and FAUCET scores indicate significant potential risk, there is currently no evidence of active exploitation, public exploit code, or community discussion.

Impacted Technologies

VendorProductVersion(s)CPE
6.46.8CPE matchmatch criteria
cpe:2.3:o:mikrotik:routeros:6.46.8:*:*:*:*:*:*:*
6.47.9CPE matchmatch criteria
cpe:2.3:o:mikrotik:routeros:6.47.9:*:*:*:*:*:*:*
6.47.10CPE matchmatch criteria
cpe:2.3:o:mikrotik:routeros:6.47.10:*:*:*:*:*:*:*

CVSS Data

CVSS version used by this source: 3.1

8.1HIGH

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

Attack Vector
NETWORK
Attack Complexity
HIGH
Privileges Required
NONE
User Interaction
NONE
Scope
UNCHANGED
Confidentiality Impact
HIGH
Integrity Impact
HIGH
Availability Impact
HIGH
Exploitability Score
2.2
Impact Score
5.9
CvssVersion
3.1

Exploit Intelligence

EPSS Score
16.23%
Probability of exploitation in next 30 days
EPSS Percentile
96.6%
Percentile rank of EPSS score among Peer Group
As of 2026-07-27
Model: v2026.06.15
This CVE's current EPSS score of 0.1623 is in the 82nd percentile among its peer group of 8,920 CVEs.

Social Chatter

The average CVE in this peer group has 0.0 Twitter, 0.1 Reddit, 0.1 Bluesky, 0.1 Mastodon, and 0.2 GitHub mentions.

Media Mentions

No media coverage found for this CVE.

The average CVE in this peer group has 0.1 InfoSec Media, 0.0 Vendor Blog, and 0.0 Security Researcher mentions.

Remediation

Remediation records are not available for this CVE.

References

mikrotik.com / download/archive
Release NotesVendor Advisory
teamt5.org / en/posts/vulnerability-mikrotik-cve-2021-41987
ExploitThird Party Advisory