How severe is CVE-2021-3017?

CVE-2021-3017 has a CVSS 3.x base score of 7.5, rated high severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is high, integrity none, and availability none.

Is CVE-2021-3017 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 63% (99th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2021-3017?

CVE-2021-3017 primarily affects Intelbras Win 300 Firmware. In total, 2 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.

How do I fix CVE-2021-3017?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its high severity, prioritise patching exposed systems.

When was CVE-2021-3017 published?

CVE-2021-3017 was published on 2021-04-14 and last updated on 2026-06-17.

CVE-2021-3017

CVE-2021-3017 is a high-severity vulnerability in Intelbras Win 300 Firmware with a CVSS 3.x base score of 7.5. Its EPSS exploit-prediction score of 63% places it in the 99th percentile, indicating an elevated likelihood of exploitation.

Key facts

Severity: High (CVSS 3.x base score 7.5)
CVSS v2: 5.0
EPSS exploit prediction: 63% (99th percentile)
Actively exploited: Not listed in CISA KEV
Affected product: Intelbras Win 300 Firmware
Published: 2021-04-14
Last modified: 2026-06-17

Description

The web interface on Intelbras WIN 300 and WRN 342 devices through 2021-01-04 allows remote attackers to discover credentials by reading the def_wirelesspassword line in the HTML source code.

Frequently asked questions

What is CVE-2021-3017?: The web interface on Intelbras WIN 300 and WRN 342 devices through 2021-01-04 allows remote attackers to discover credentials by reading the def_wirelesspassword line in the HTML source code.
How severe is CVE-2021-3017?: CVE-2021-3017 has a CVSS 3.x base score of 7.5, rated high severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is high, integrity none, and availability none.
Is CVE-2021-3017 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 63% (99th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2021-3017?: CVE-2021-3017 primarily affects Intelbras Win 300 Firmware. In total, 2 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.
How do I fix CVE-2021-3017?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its high severity, prioritise patching exposed systems.
When was CVE-2021-3017 published?: CVE-2021-3017 was published on 2021-04-14 and last updated on 2026-06-17.

References

Affected products (2)

cpe:2.3:o:intelbras:win_300_firmware:*:*:*:*:*:*:*:*
cpe:2.3:o:intelbras:wrn_342_firmware:*:*:*:*:*:*:*:*