How severe is CVE-2021-23859?

CVE-2021-23859 has a CVSS 3.x base score of 9.1, rated critical severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is none, integrity high, and availability high.

Is CVE-2021-23859 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (58th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2021-23859?

CVE-2021-23859 primarily affects Bosch Bosch Video Management System. In total, 8 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.

How do I fix CVE-2021-23859?

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

When was CVE-2021-23859 published?

CVE-2021-23859 was published on 2021-12-08 and last updated on 2026-06-17.

CVE-2021-23859

CVE-2021-23859 is a critical-severity vulnerability in Bosch Bosch Video Management System with a CVSS 3.x base score of 9.1. It is not currently listed as actively exploited by CISA, and its EPSS exploit-prediction score is low. The underlying weakness is classified as CWE-755.

Key facts

Severity: Critical (CVSS 3.x base score 9.1)
CVSS v2: 5.0
EPSS exploit prediction: 1% (58th percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-755
Affected product: Bosch Bosch Video Management System
Published: 2021-12-08
Last modified: 2026-06-17

Description

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

Frequently asked questions

What is CVE-2021-23859?: 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
How severe is CVE-2021-23859?: CVE-2021-23859 has a CVSS 3.x base score of 9.1, rated critical severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is none, integrity high, and availability high.
Is CVE-2021-23859 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (58th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2021-23859?: CVE-2021-23859 primarily affects Bosch Bosch Video Management System. In total, 8 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.
How do I fix CVE-2021-23859?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its critical severity, prioritise patching exposed systems.
When was CVE-2021-23859 published?: CVE-2021-23859 was published on 2021-12-08 and last updated on 2026-06-17.

References

https://psirt.bosch.com/security-advisories/bosch-sa-043434-bt.html

Affected products (8)

cpe:2.3:a:bosch:bosch_video_management_system:*:*:*:*:*:*:*:*
cpe:2.3:a:bosch:bosch_video_management_system:10.1:*:*:*:*:*:*:*
cpe:2.3:a:bosch:bosch_video_management_system:11.0:*:*:*:*:*:*:*
cpe:2.3:a:bosch:video_recording_manager:*:*:*:*:*:*:*:*
cpe:2.3:o:bosch:access_easy_controller_firmware:*:*:*:*:*:*:*:*
cpe:2.3:a:bosch:access_professional_edition:*:*:*:*:*:*:*:*
cpe:2.3:a:bosch:building_integration_system:*:*:*:*:*:*:*:*
cpe:2.3:a:bosch:video_recording_manager_exporter:*:*:*:*:*:*:*:*

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