What’s Vulnerable › Vulnerabilities

CVE-2017-6297

• Severity: medium (CVSS 5.9 v3.0)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 0.7% probability of exploitation in the next 30 days
• Public exploit or detection template: yes
• Published: 2017-02-27 · updated 2026-09-16
• Weakness: CWE-311

Description

The L2TP Client in MikroTik RouterOS versions 6.38.3 and 6.37.4 does not enable IPsec encryption after a reboot, which allows man-in-the-middle attackers to view transmitted data unencrypted and gain access to networks on the L2TP server by monitoring the packets for the transmitted data and obtaining the L2TP secret.

Affected products

• MikroTik RouterOS: 6.37.4, 6.83.3

References

• http://www.securityfocus.com/bid/96447
• https://blog.milne.it/2017/02/24/mikrotik-routeros-security-vulnerability-l2tp-tunnel-unencrypted-cve-2017-6297/
• http://www.securityfocus.com/bid/96447
• https://blog.milne.it/2017/02/24/mikrotik-routeros-security-vulnerability-l2tp-tunnel-unencrypted-cve-2017-6297/

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