What is CVE-2021-23846?

CVE-2021-23846 is a high-severity vulnerability in Bosch B426, classified under Cleartext Transmission of Sensitive Information. CVSS score: 8.8/10. Published 2021-06-18.

How severe is CVE-2021-23846?

High severity. CVSS v3 base score is 8.8 out of 10.

Vulnerability in Bosch B426

CVE-2021-23846

When using http protocol, the user password is transmitted as a clear text parameter for which it is possible to be obtained by an attacker through a MITM attack. This will be fixed starting from Firmware version 3.11.5, which will be released on the 30th of June, 2021.

Published 2021-06-18 · last modified 2026-06-17.

CVSS v3 metric

CVSS v3 base score 8.8 (High). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H.

EPSS exploit prediction

EPSS: 0.005 (38.1th percentile), scored 2026-09-29.

Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 38th percentile — 38.1% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS over last 30 days · oldest: 0.005 · newest: 0.005 · change: -0.001

Affected products

Bosch B426
Bosch B426 Firmware — versions 03.01.0004, 03.02.002, 03.03.0009
Bosch B426 Firmware — versions 03.01.0004, 03.02.002, 03.05.0003

Weakness classification (CWE)

CWE-319 — Cleartext Transmission of Sensitive Information

References

psirt.bosch.com/security-advisories/bosch-sa-196933-bt.html (Vendor Advisory)

Frequently asked questions

What is CVE-2021-23846?: CVE-2021-23846 is a high-severity vulnerability in Bosch B426, classified under Cleartext Transmission of Sensitive Information. CVSS score: 8.8/10. Published 2021-06-18.
How severe is CVE-2021-23846?: High severity. CVSS v3 base score is 8.8 out of 10.