Read the docs
TI-2019-02982 Aliases CVE-2019-3977GHSA-94gr-5fp3-387v

RouterOS 6.45.6 Stable, RouterOS 6.44.5 Long-term, and below insufficiently validate…

Priority LOW 35CWE-494Published · Updated

Key facts

Attack vector
Network
Privileges required
None
User interaction
None
Attack complexity
Low
Impact type
Code execution
Confidentiality · integrity · availability
None · High · None
Fix status
No fix listed

Attack profile from CVSS 3.1 · NVD. Fix status from CNA. Impact type from CWE-494.

Summary

RouterOS 6.45.6 Stable, RouterOS 6.44.5 Long-term, and below insufficiently validate where upgrade packages are download from when using the autoupgrade feature. Therefore, a remote attacker can trick the router into "upgrading" to an older version of RouterOS and possibly reseting all the system's usernames and passwords.

Why it matters now

EPSS 0.01059 64th percentileScored 2026-11-07
Fix No fix listed No fixed version in the sources yet

SSVC decision points

Not available: CISA has not published SSVC decision points for this record.

Affected products

VendorProductAffected versionsFixed inStatusSource
—MikroTik RouterOSRouterOS 6.45.6 Stable and below. RouterOS 6.44.5 Long-term and below.—No fix listedCNA
  • MikroTik RouterOS Vendor— Affected RouterOS 6.45.6 Stable and below. RouterOS 6.44.5 Long-term and below. Fixed in — No fix listed CNA

CPE configurations NVD · 2

CPEVersionsRoleVendor
cpe:2.3:o:mikrotik:routeros:*:*:*:*:ltr:*:*:*up to 6.44.5VulnerableMikroTik
cpe:2.3:o:mikrotik:routeros:*:*:*:*:-:*:*:*up to 6.45.6VulnerableMikroTik
  • cpe:2.3:o:mikrotik:routeros:*:*:*:*:ltr:*:*:* Versions up to 6.44.5 Vulnerable ·MikroTik
  • cpe:2.3:o:mikrotik:routeros:*:*:*:*:-:*:*:* Versions up to 6.45.6 Vulnerable ·MikroTik

Remediation

No fixed version listed by the sources yet.

Timeline

  1. 2026-10-02 Threatist record created from CVE-2019-3977
  2. 2026-10-03 Alias added: GHSA-94gr-5fp3-387v

References

Advisory 1

  • TI-2018-05369 A buffer overflow was found in the MikroTik RouterOS SMB service when processing NetBIOS… KEVCVSS 3.1CRITICAL 9.8
  • TI-2026-58872 SSH session privilege manipulation via a crafted username in Mikrotik RouterOS KEVCVSS 4.0CRITICAL 9.2
  • TI-2018-10669 MikroTik RouterOS through 6.42 allows unauthenticated remote attackers to read arbitrary… KEVCVSS 3.1CRITICAL 9.1
  • TI-2026-47574 Kernel memory disclosure and denial of service in MikroTik RouterOS btest service KEVCVSS 4.0HIGH 8.8
  • TI-2026-47576 SSH Pre-Authentication Rekey State Bypass in MikroTik RouterOS KEVCVSS 4.0MEDIUM 6.9
  • TI-2022-22302 Out-of-bounds read in MicroTik RouterOS CVSS 3.1CRITICAL 9.8
See all 87 →

Sources

This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences