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NVD / CVE Program· CNA mitre

CVE-2020-27555: Use of default credentials for the telnet server in BASETech GE-131 BT-1837836 firmware 20180921 allows remote attackers to execute…

CriticalCVSS 9.8 · v3.1—No exploit No fix recorded

Noroxi assessment

Priority: Plan (action score 40/100)

  • The sources we track (CISA KEV, Exploit-DB, Metasploit, Nuclei, GitHub) show no public exploit code or exploitation in the wild.
  • Probability of exploitation in the next 30 days: 2.5% (FIRST EPSS); higher than 85.1% of all records.
  • Anyone who can reach it over the internet can trigger it. No account or password is required. No user action is required. No special conditions are required; it is repeatable.
  • According to the record, no fixed version is available yet.

Add it to your regular patch cycle. Update when a fix is released; follow the vendor's advisory.

Generated automatically from the record's data: CVSS (NVD and CNA), CISA KEV and SSVC, FIRST EPSS, exploit sources, fixed versions. How we calculate it

Primary sources: NVD · CVE.org · FIRST EPSS

Use of default credentials for the telnet server in BASETech GE-131 BT-1837836 firmware 20180921 allows remote attackers to execute arbitrary system commands as the root user.

Published
Nov 17, 2020
Updated
Jun 16, 2026
EPSS
2.5% · 85th percentile

Report tools

JSON

Action score

40

Plan

Add it to your regular patch cycle.

CVSS
39 / 40 · 9.8 / 10
CISA KEV
0 / 30 · Not listed
EPSS
1 / 30 · 2.5%

Get told when this record changes

  • Not in KEV: no record of exploitation in the wild
  • No public exploit code on record
  • No fixed version yet

If any of these changes, we'll tell you in the daily email digest.

Follow CVE-2020-27555

When you'll hear from us

  • when it enters CISA KEV
  • when exploit code appears or is weaponized
  • when the record is updated (including a fixed version)
  • when EPSS rises 20 points in a week

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Noroxi analysis

What does it mean in your environment?

The assessment above is generated automatically from the record's data; it doesn't know your environment. Our team verifies on your systems whether this vulnerability is actually exploitable and which mitigation is enough.

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Affected systems

Is your version affected?

Pick the product and type the version you run. It's compared with this record's version ranges in your browser; the version isn't sent anywhere.

VendorProduct
basetechge-131 bt-1837836 firmware
basetechge-131 bt-1837836

Affected versions

NVD version ranges (for catalog products). Add the product to your stack with a version and matching uses these.

  • basetech ge-131 bt-1837836 firmware20180921

Same product

basetech: all records

Other highest-scoring records for the same primary product.

  • CVE-2020-27554Cleartext Transmission of Sensitive Information vulnerability in BASETech GE-131 BT-1837836 firmware 20180921 exists which could leak…
    30Monitor
  • CVE-2020-27553In BASETech GE-131 BT-1837836 firmware 20180921, the web-server on the system is configured with the option “DocumentRoot /etc“.
    30Monitor
  • CVE-2020-27558Use of an undocumented user in BASETech GE-131 BT-1837836 firmware 20180921 allows remote attackers to view the video stream.
    26Monitor

Published before and after this one in the same product

  • Later →CVE-2020-27556Nov 17, 2020 · A predictable device ID in BASETech GE-131 BT-1837836 firmware 20180921 allows unauthenticated remote attackers to connect to the device.
    21Monitor
  • Later →CVE-2020-27557Nov 17, 2020 · Unprotected Storage of Credentials vulnerability in BASETech GE-131 BT-1837836 firmware 20180921 allows local users to gain access to the…
    22Monitor

Remediation

Which version to upgrade to

Fix versions compiled from the vendor, package registries and Microsoft. Verify the vendor's note before upgrading.

No fix version is recorded for this entry. Check the references for vendor advisories.

Exploit status

No known public exploit

No public exploit has been observed yet. That doesn't mean you're safe, only that the bar is a little higher.

Research context

For pentesters and researchers: attack profile, score disagreement, timeline, patch commits, credits, variant and chain candidates, bug bounty scope. All derived from existing data; no exploit code.

Timeline

From publication to today: proof of concept, Metasploit module, CISA KEV and fix record. Dates are as reported by the sources.

No dated events beyond publication.

Not on record for this CVE: EPSS history · patch commit or PR link · researcher credit · variant or chain candidate · public bounty program.

Technical details

Attack conditions

  • Anyone who can reach it over the internet can trigger it.
  • No account or password is required.
  • No user action is required.
  • No special conditions are required; it is repeatable.

If successful

Confidentiality
high · data can be read
Integrity
high · data or configuration can be modified
Availability
high · the service can be disrupted
Attack vector
Network
Attack complexity
Low
Privileges required
None
User interaction
None
Scope
Unchanged
Confidentiality impact
High
Integrity impact
High
Availability impact
High

Weakness class (CWE)

CWE-1188 · Initialization of a Resource with an Insecure Default

CVSS vector

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

nvd-primary

Attack context

MITRE CAPEC attack patterns and ATT&CK techniques for this weakness class (CWE). A starting point for detection rules and threat hunting.

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