What is CVE-2021-29255?

CVE-2021-29255 is a high-severity vulnerability in Microseven Mym71080i-B, classified under Insufficiently Protected Credentials. CVSS score: 7.5/10. Published 2021-03-26.

How severe is CVE-2021-29255?

High severity. CVSS v3 base score is 7.5 out of 10.

Vulnerability in Microseven Mym71080i-B

CVE-2021-29255

MicroSeven MYM71080i-B 2.0.5 through 2.0.20 devices send admin credentials in cleartext to pnp.microseven.com TCP port 7007. An attacker on the same network as the device can capture these credentials.

Published 2021-03-26 · last modified 2026-06-17.

CVSS v3 metric

CVSS v3 base score 7.5 (High). Vector: CVSS:3.1/AV:A/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H.

EPSS exploit prediction

EPSS: 0.006 (44.1th percentile), scored 2026-10-01.

Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 44th percentile — 44.1% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS over last 30 days · oldest: 0.006 · newest: 0.006 · change: 0.000

Affected products

Weakness classification (CWE)

CWE-522 — Insufficiently Protected Credentials

References

blog.microseven.com (Vendor Advisory)
cybergladius.com/cve-2021-29255-vulnerability-disclosure/ (Exploit, Third Party Advisory)

Frequently asked questions

What is CVE-2021-29255?: CVE-2021-29255 is a high-severity vulnerability in Microseven Mym71080i-B, classified under Insufficiently Protected Credentials. CVSS score: 7.5/10. Published 2021-03-26.
How severe is CVE-2021-29255?: High severity. CVSS v3 base score is 7.5 out of 10.