MEDIUM
Mikrotik RouterOs before stable 6.47 suffers from a memory corruption vulnerability in the resolver process
Published Jul 19, 2021
6.5
MEDIUMCVSS 3.1
EPSS 1.75%
Description
Mikrotik RouterOs before stable 6.47 suffers from a memory corruption vulnerability in the resolver process. By sending a crafted packet, an authenticated remote attacker can cause a Denial of Service.
Affected products
Remediation
No remediation recorded yet.
Metrics
No CVSS v4.0 score for this CVE.
6.5 MEDIUM NVD
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
Attack Vector Network
Attack Complexity Low
Privileges Required Low
User Interaction None
Scope Unchanged
Confidentiality Impact None
Integrity Impact None
Availability Impact High
No CVSS v3.0 score for this CVE.
4.0 MEDIUM NVD
AV:N/AC:L/Au:S/C:N/I:N/A:P
Access Vector Network
Access Complexity Low
Authentication Single
Confidentiality Impact None
Integrity Impact None
Availability Impact Partial
This CVE is not in the KEV list.
No CISA SSVC assessment for this CVE yet.
1.75% 0.01754
Estimated probability of exploitation in the wild in the next 30 days (FIRST EPSS). As of Oct 1, 2026.
EPSS probability 0.01754
Score over time
2021–2026- EPSS v1
- EPSS v5
- EPSS v2
- EPSS v3
- EPSS v4
Percentile over time
- EPSS v1
- EPSS v5
- EPSS v2
- EPSS v3
- EPSS v4
Table of values (12 key points)
Flat stretches are collapsed; showing up to 120 newest points.
| Date | Score | Percentile | Model |
|---|---|---|---|
| Oct 1, 2026 | 1.75% (0.01754) | 77.10th | v5 (v2026.06.15) |
| Jun 15, 2026 | 1.75% (0.01754) | 74.93th | v5 (v2026.06.15) |
| Mar 17, 2025 | 0.31% (0.00311) | 52.02th | v4 (v2025.03.14) |
| Dec 12, 2024 | 0.20% (0.00201) | 58.92th | v3 (v2023.03.01) |
| Mar 7, 2023 | 0.20% (0.00201) | 56.14th | v3 (v2023.03.01) |
| Mar 6, 2023 | 1.05% (0.01055) | 52.13th | v2 (v2022.01.01) |
| Apr 1, 2022 | 1.05% (0.01055) | 48.43th | v2 (v2022.01.01) |
| Feb 4, 2022 | 4.50% (0.04499) | 74.08th | v2 (v2022.01.01) |
| Feb 3, 2022 | 2.34% (0.02343) | 53.78th | v5 (v2026.06.15) |
| Jan 6, 2022 | 2.34% (0.02343) | 53.33th | v1 |
| Sep 1, 2021 | 0.53% (0.00532) | 32.30th | v1 |
| Jul 20, 2021 | 0.53% (0.00532) | 0.00th | v1 |
Weaknesses (1)
References (1)
- https://github.com/cq674350529/pocs_slides/blob/master/advisory/MikroTik/CVE-2020-20249/README.md x_refsource_MISCExploitThird Party Advisory
| Link | Providers | Tags |
|---|---|---|
| https://github.com/cq674350529/pocs_slides/blob/master/advisory/MikroTik/CVE-2020-20249/README.md | x_refsource_MISCExploitThird Party Advisory |
Change history (0)
No recorded changes yet.
Sources
CVE.org / MITRE
Status PUBLISHED
Assigner mitre
Published Jul 19, 2021
Updated Aug 4, 2024
Reserved Aug 13, 2020
Link CVE-2020-20249
CISA Vulnrichment
Updated n/a