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Fencer Vulns
critical 9.1

CVE-2021-23859 json

Denial of Service and Authentication Bypass Vulnerability in multiple Bosch products

published 2021-12-08 4 y ago modified 2026-06-17 4 mo ago also EUVD-2021-10785

cvss
9.1
version 3.1, CNA
cisa kev
Not listed
not in CISA's catalog
epss
1.0%
EPSS 1.0% chance of exploitation in 30 days, percentile 63%
public exploits
0
none known

Summary

An unauthenticated attacker is able to send a special HTTP request, that causes a service to crash. In case of a standalone VRM or BVMS with VRM installation this crash also opens the possibility to send further unauthenticated commands to the service. On some products the interface is only local accessible lowering the CVSS base score. For a list of modified CVSS scores, please see the official Bosch Advisory Appendix chapter Modified CVSS Scores for CVE-2021-23859

Patch / fix

  • Bosch BVMS 10.0.2, 10.1.1, 11.0.0

Exploit prediction

1.00% chance of exploitation in the next 30 days, higher than 63% of all scored CVEs (FIRST EPSS, 2026-11-08).

CVSS scores

assigned by version score vector
CNA 3.1 9.1 CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:H
NVD 3.1 7.5 CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
NVD 2.0 5.0 AV:N/AC:L/Au:N/C:N/I:N/A:P

Affected products

  • Bosch BVMS
  • Bosch DIVAR IP 7000 R2
  • Bosch DIVAR IP all-in-one 5000
  • Bosch DIVAR IP all-in-one 7000
  • Bosch VRM
  • Bosch VRM Exporter
  • Bosch APE
  • Bosch AEC
  • Bosch BIS

Classification

Weakness
  • CWE-703 Improper Check or Handling of Exceptional Conditions
  • CWE-755 Improper Handling of Exceptional Conditions

References

Sources

Fencer Vulns keeps one entry per vulnerability: the CVE id wins, then GHSA, and records that alias each other are merged, except that two CVEs always keep separate entries. The same data is available as JSON.