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CVE-2018-20388

29
FAUCET Score

CVE-2018-20388 is a critical vulnerability affecting Comtrend CM-6200un and CM-6300n devices, allowing remote attackers to discover credentials through specific SNMP requests. With a CVSS score of 9.8, this vulnerability is easily exploitable over the network with low complexity, leading to high confidentiality, integrity, and availability impacts. Despite its severity, there is currently no evidence of active exploitation, public exploit code (Metasploit, Nuclei, ExploitDB), or significant community discussion or media coverage.

Impacted Technologies

VendorProductVersion(s)CPE
123.447.007CPE matchmatch criteria
cpe:2.3:o:comtrend:cm-6200un_firmware:123.447.007:*:*:*:*:*:*:*
123.553mp1.005CPE matchmatch criteria
cpe:2.3:o:comtrend:cm-6300n_firmware:123.553mp1.005:*:*:*:*:*:*:*

CVSS Data

CVSS version used by this source: 3.0

9.8CRITICAL

CVSS:3.0/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
3.0

Exploit Intelligence

EPSS Score
1.51%
Probability of exploitation in next 30 days
EPSS Percentile
71.8%
Percentile rank of EPSS score among Peer Group
As of 2026-07-25
Model: v2026.06.15
This CVE's current EPSS score of 0.0151 is in the 59th percentile among its peer group of 36,829 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

No media coverage found for this CVE.

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 / ezelf/sensitivesOids/blob/master/oidpassswordleaks.csv
Third Party Advisory
misteralfa-hack.blogspot.com / 2018/12/stringbleed-y-ahora-que-passwords-leaks.html
ExploitThird Party Advisory