Is CVE-2017-20149 actively exploited?

No active exploitation of CVE-2017-20149 has been confirmed so far. Continue monitoring, as exploit status can change.

Can CVE-2017-20149 be exploited remotely?

Yes. CVE-2017-20149 is exploitable remotely over the network (CVSS attack vector: Network).

What is the CVSS score of CVE-2017-20149?

CVE-2017-20149 has a CVSS score of 9.8 (CRITICAL).

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CRITICAL

CVE-2017-20149

CWE-787Published: October 15, 2022· Updated: Jun 17, 2026

9.8

CVSS v3.1

Official Description

The Mikrotik RouterOS web server allows memory corruption in releases before Stable 6.38.5 and Long-term 6.37.5, aka Chimay-Red. A remote and unauthenticated user can trigger the vulnerability by sending a crafted HTTP request. An attacker can use this vulnerability to execute arbitrary code on the affected system, as exploited in the wild in mid-2017 and later.

NVD Source

Risk Analysis

Mikrotik RouterOS is vulnerable to memory corruption in its web server, allowing unauthenticated remote attackers to execute arbitrary code. This critical flaw was historically exploited in the wild.

While there is no current public exploit status provided, the vulnerability has a history of active exploitation. It is remotely exploitable with low attack complexity.

Recommended Action

Upgrade RouterOS to Stable 6.38.5, Long-term 6.37.5, or newer versions. Disable the web management interface if it is not required for administrative tasks.

Generated by the CTIWATCH analysis pipeline from this CVE's metadata (CVSS, EPSS, KEV status, exploit intelligence). Verify against vendor advisories before acting.

Technical Analysis

CVE-2017-20149 can be exploited remotely over the network without requiring physical or adjacent access, significantly expanding the attack surface for threat actors.

The vulnerability requires no privileges and no user interaction, making it a prime target for automated exploitation campaigns and worm-like propagation.

A successful exploit results in complete confidentiality breach (data exposure), full integrity compromise (data manipulation), availability disruption (denial of service), with a CVSS base score of 9.8.

From a weakness classification perspective (CWE-787): Out-of-bounds write vulnerabilities can lead to data corruption, crashes, or arbitrary code execution.