CVE-2020-22844
CVE-2020-22844 is a high-severity vulnerability in Mikrotik Routeros with a CVSS 3.x base score of 7.5. It is not currently listed as actively exploited by CISA, and its EPSS exploit-prediction score is low. The underlying weakness is classified as CWE-401.
Key facts
- Severity: High (CVSS 3.x base score 7.5)
- CVSS v2: 5.0
- EPSS exploit prediction: 1% (65th percentile)
- Actively exploited: Not listed in CISA KEV
- Weakness: CWE-401
- Affected product: Mikrotik Routeros
- Published:
- Last modified:
Description
A buffer overflow in Mikrotik RouterOS 6.47 allows unauthenticated attackers to cause a denial of service (DOS) via crafted SMB requests.
Frequently asked questions
- What is CVE-2020-22844?
- A buffer overflow in Mikrotik RouterOS 6.47 allows unauthenticated attackers to cause a denial of service (DOS) via crafted SMB requests.
- How severe is CVE-2020-22844?
- CVE-2020-22844 has a CVSS 3.x base score of 7.5, rated high severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is none, integrity none, and availability high.
- Is CVE-2020-22844 being actively exploited?
- It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (65th percentile), an estimate of the probability of exploitation in the next 30 days.
- What products are affected by CVE-2020-22844?
- CVE-2020-22844 affects Mikrotik Routeros. See the affected-products list for the exact vulnerable versions.
- How do I fix CVE-2020-22844?
- Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its high severity, prioritise patching exposed systems.
- When was CVE-2020-22844 published?
- CVE-2020-22844 was published on 2022-02-28 and last updated on 2026-06-17.
References
Affected products (1)
- cpe:2.3:o:mikrotik:routeros:6.47:*:*:*:*:*:*:*
More vulnerabilities in Mikrotik Routeros
- CVE-2017-20149 — Critical (CVSS 9.8): The Mikrotik RouterOS web server allows memory corruption in releases before Stable 6.38.5 and Long-term 6.37.5, aka…
- CVE-2022-34960 — Critical (CVSS 9.8): The container package in MikroTik RouterOS 7.4beta4 allows an attacker to create mount points pointing to symbolic…
- CVE-2018-7445 — Critical (CVSS 9.8): A buffer overflow was found in the MikroTik RouterOS SMB service when processing NetBIOS session request messages.…
- CVE-2023-30799 — Critical (CVSS 9.1): MikroTik RouterOS stable before 6.49.7 and long-term through 6.48.6 are vulnerable to a privilege escalation issue. A…
- CVE-2018-14847 — Critical (CVSS 9.1): MikroTik RouterOS through 6.42 allows unauthenticated remote attackers to read arbitrary files and remote authenticated…
- CVE-2022-45313 — High (CVSS 8.8): Mikrotik RouterOs before stable v7.5 was discovered to contain an out-of-bounds read in the hotspot process. This…
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