High severity · published Oct 29, 2019
CVE-2019-3976
RouterOS 6.45.6 Stable, RouterOS 6.44.5 Long-term, and below are vulnerable to an arbitrary directory creation vulnerability via the upgrade package's name field
8.8
CVSS
1.7%
EPSS
No
On KEV
Description
RouterOS 6.45.6 Stable, RouterOS 6.44.5 Long-term, and below are vulnerable to an arbitrary directory creation vulnerability via the upgrade package's name field. If an authenticated user installs a malicious package then a directory could be created and the developer shell could be enabled.
CVSS vector
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
Attack vector
Network
Complexity
Low
Privileges
Low
User interaction
None
Confidentiality
High
Integrity
High
Availability
High
Scope
Unchanged
Exploitation
Is it being used?
Exploit prediction (EPSS)1.7% · higher than 77% of CVEs
Exploited in the wildNo evidence yet
CISA KEVNot listed
Ransomware campaign useNot known
Affected products
Which versions
RO
Routeros · Mikrotik
through 6.44.5; through 6.45.6 · source: NVD
Affected product
RO
Routeros
Mikrotik
More from Routeros
9.8
CVE-2026-86060
SSH session privilege manipulation via a crafted username in Mikrotik RouterOS
9.8
CVE-2018-7445
MikroTik RouterOS Stack-Based Buffer Overflow Vulnerability
9.1
CVE-2018-14847
MikroTik Router OS Directory Traversal Vulnerability
8.2
CVE-2026-67277
Kernel memory disclosure and denial of service in MikroTik RouterOS btest service
6.5
CVE-2026-67279
SSH Pre-Authentication Rekey State Bypass in MikroTik RouterOS