How severe is CVE-2021-23858?

CVE-2021-23858 has a CVSS 3.x base score of 8.6, 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-2021-23858 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (65th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2021-23858?

CVE-2021-23858 primarily affects Bosch Rexroth Indramotion Mlc L20 Firmware. In total, 12 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.

How do I fix CVE-2021-23858?

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-2021-23858 published?

CVE-2021-23858 was published on 2021-10-04 and last updated on 2026-06-17.

CVE-2021-23858

CVE-2021-23858 is a high-severity vulnerability in Bosch Rexroth Indramotion Mlc L20 Firmware with a CVSS 3.x base score of 8.6. 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-306.

Key facts

Severity: High (CVSS 3.x base score 8.6)
CVSS v2: 7.8
EPSS exploit prediction: 1% (65th percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-306
Affected product: Bosch Rexroth Indramotion Mlc L20 Firmware
Published: 2021-10-04
Last modified: 2026-06-17

Description

Information disclosure: The main configuration, including users and their hashed passwords, is exposed by an unprotected web server resource and can be accessed without authentication. Additionally, device details are exposed which include the serial number and the firmware version by another unprotected web server resource.

Frequently asked questions

What is CVE-2021-23858?: Information disclosure: The main configuration, including users and their hashed passwords, is exposed by an unprotected web server resource and can be accessed without authentication. Additionally, device details are exposed which include the serial number and the firmware version by another unprotected web server resource.
How severe is CVE-2021-23858?: CVE-2021-23858 has a CVSS 3.x base score of 8.6, 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-2021-23858 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (65th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2021-23858?: CVE-2021-23858 primarily affects Bosch Rexroth Indramotion Mlc L20 Firmware. In total, 12 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.
How do I fix CVE-2021-23858?: 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-2021-23858 published?: CVE-2021-23858 was published on 2021-10-04 and last updated on 2026-06-17.

References

https://psirt.bosch.com/security-advisories/bosch-sa-741752.html

Affected products (12)

cpe:2.3:o:bosch:rexroth_indramotion_mlc_l20_firmware:*:*:*:*:*:*:*:*
cpe:2.3:o:bosch:rexroth_indramotion_mlc_l40_firmware:*:*:*:*:*:*:*:*
cpe:2.3:o:bosch:rexroth_indramotion_mlc_l25_firmware:*:*:*:*:*:*:*:*
cpe:2.3:o:bosch:rexroth_indramotion_mlc_l45_firmware:*:*:*:*:*:*:*:*
cpe:2.3:o:bosch:rexroth_indramotion_mlc_l65_firmware:*:*:*:*:*:*:*:*
cpe:2.3:o:bosch:rexroth_indramotion_mlc_l85_firmware:*:*:*:*:*:*:*:*
cpe:2.3:o:bosch:rexroth_indramotion_mlc_xm21_firmware:*:*:*:*:*:*:*:*
cpe:2.3:o:bosch:rexroth_indramotion_mlc_xm22_firmware:*:*:*:*:*:*:*:*
cpe:2.3:o:bosch:rexroth_indramotion_mlc_xm41_firmware:*:*:*:*:*:*:*:*
cpe:2.3:o:bosch:rexroth_indramotion_mlc_xm42_firmware:*:*:*:*:*:*:*:*
cpe:2.3:o:bosch:indracontrol_xlc_firmware:*:*:*:*:*:*:*:*
cpe:2.3:o:bosch:rexroth_indramotion_mlc_l75_firmware:*:*:*:*:*:*:*:*

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