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CVE-2017-20149

31
FAUCET Score

CVE-2017-20149, also known as Chimay-Red, is a critical memory corruption vulnerability affecting Mikrotik RouterOS web servers in releases prior to Stable 6.38.5 and Long-term 6.37.5. This flaw allows a remote, unauthenticated attacker to execute arbitrary code by sending a specially crafted HTTP request. With a CVSS score of 9.8 (CRITICAL), it presents a severe risk due to its network-based attack vector and complete compromise potential (Confidentiality, Integrity, Availability). The vulnerability was exploited in the wild in mid-2017, and while no public exploit code is listed for Metasploit, Nuclei, or ExploitDB, it has garnered significant community discussion and media coverage, indicating its historical impact and continued relevance.

Impacted Technologies

VendorProductVersion(s)CPE
< 6.37.5CPE matchmatch criteria
cpe:2.3:o:mikrotik:routeros:*:*:*:*:ltr:*:*:*
>= 6.38, < 6.38.5CPE matchmatch criteria
cpe:2.3:o:mikrotik:routeros:*:*:*:*:*:*:*:*

CVSS Data

CVSS version used by this source: 3.1

9.8CRITICAL

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

Attack Vector
NETWORK
Attack Complexity
LOW
Privileges Required
NONE
User Interaction
NONE
Scope
UNCHANGED
Confidentiality Impact
HIGH
Integrity Impact
HIGH
Availability Impact
HIGH
Exploitability Score
3.9
Impact Score
5.9
CvssVersion
3.1

Exploit Intelligence

EPSS Score
1.85%
Probability of exploitation in next 30 days
EPSS Percentile
76.9%
Percentile rank of EPSS score among Peer Group
As of 2026-07-27
Model: v2026.06.15
This CVE's current EPSS score of 0.0185 is in the 65th percentile among its peer group of 36,862 CVEs.

Social Chatter

The average CVE in this peer group has 0.0 Twitter, 0.1 Reddit, 0.3 Bluesky, 0.3 Mastodon, and 2.4 GitHub mentions.

Media Mentions

The average CVE in this peer group has 0.3 InfoSec Media, 0.0 Vendor Blog, and 0.0 Security Researcher mentions.

Remediation

Remediation records are not available for this CVE.

References

github.com / BigNerd95/Chimay-Red
ExploitThird Party Advisory
bleepingcomputer.com / news/security/hajime-botnet-makes-a-comeback-with-massive-scan-for-mikrotik-routers
ExploitThird Party Advisory