9.8

CVE-2021-20155: trendnet tew-827dru_firmware Use of Hard-coded Credentials

CVSS: 9.8v3.1CriticalModified
Published 30-12-2021Last modified 03-08-2024
Open JSON

Vulnerability summary

CVE-2021-20155 is a critical (CVSS 9.8) Use of Hard-coded Credentials vulnerability in trendnet tew-827dru_firmware. EPSS estimates a 1.90% chance of exploitation in the next 30 days, higher than 79.3% of scored vulnerabilities. 1 public exploit is recorded.

Overall risk
70/100
0100
High · default modelHow is this calculated?
CVSS score
9.8/10
010
Critical · v3.1 (NVD)
EPSS score
1.90%
0%100%
Low · 0.00 pp in 30 days
KEVNot listedIn no KEV catalog
RansomwareNone recordedNo known use recorded
Public exploits1reference

Timeline

  1. 30-12-2021
    PublishedVulnerability first disclosed.
  2. 03-08-2024
    Last modifiedVulnerability information updated.

Description

Trendnet AC2600 TEW-827DRU version 2.08B01 makes use of hardcoded credentials. It is possible to backup and restore device configurations via the management web interface. These devices are encrypted using a hardcoded password of "12345678".

CVSS metrics

2 scores · 1 source · 2 versions

EPSS trend

Probability

1.90%

Chance of exploitation in the next 30 days

Percentile

79%

Versus all other CVEs

30-day change

0.00 pp

From 1.90% on 20-09-2026

20-09-202620-10-2026
EPSS score
1.90%

Known exploited

Compare KEV catalogs

Not in any of the 3 tracked catalogs.

Public exploits

1 found
  • referenceUnverified

    Exploit Reference (tenable.com)

    Maturity: unknown

Weaknesses

CWE · root cause

Affected systems

Trendnet1 product

1 vendor · 1 product

References

1 links