CVE-2021-41987: mikrotik routeros Out-of-bounds Write
CVSS: 8.1v3.1HighModified
Published 16-03-2022Last modified 04-08-2024
Vulnerability summary
CVE-2021-41987 is a high (CVSS 8.1) Out-of-bounds Write vulnerability in mikrotik routeros. EPSS estimates a 16.23% chance of exploitation in the next 30 days, higher than 96.9% of scored vulnerabilities. 1 public exploit is recorded.
CVSS score
8.1/10
010
High · v3.1 (NVD)EPSS score
16.23%
0%100%
Medium · 0.00 pp in 30 daysKEVNot listedIn no KEV catalog
RansomwareNone recordedNo known use recorded
Public exploits1reference
Timeline
- 16-03-2022PublishedVulnerability first disclosed.
- 04-08-2024Last modifiedVulnerability information updated.
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.
CVSS metrics
2 scores · 1 source · 2 versionsHigh 8.1Preferred score · NVD (NIST)
CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:HSourcesSingle source
Medium 6.8Preferred score · NVD (NIST)
AV:N/AC:M/Au:N/C:P/I:P/A:PSourcesSingle source
EPSS trend
Probability
16.23%
Chance of exploitation in the next 30 days
Percentile
97%
Versus all other CVEs
30-day change
0.00 pp
From 16.23% on 20-09-2026
20-09-202620-10-2026
EPSS score16.23%
Known exploited
Compare KEV catalogsNot in any of the 3 tracked catalogs.
Public exploits
1 foundExploit Reference (teamt5.org)
Maturity: unknown
Weaknesses
CWE · root causeAffected systems
Mikrotik1 product
- routerosEOL6.46.8 | 6.47.9 | 6.47.10
1 vendor · 1 product
References
2 links- teamt5.org/en/posts/vulnerability-mikrotik-cve-2021-41987/X Refsource MISCExploitThird Party Advisory