What’s Vulnerable › Vulnerabilities

CVE-2019-3977

• Severity: high (CVSS 7.5 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 1.1% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2019-10-29 · updated 2026-06-17
• Weakness: CWE-494

Description

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.

Affected products

• MikroTik RouterOS: through 6.44.5; through 6.45.6

References

• https://www.tenable.com/security/research/tra-2019-46
• https://www.tenable.com/security/research/tra-2019-46

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