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CVE-2021-23857

29
FAUCET Score

CVE-2021-23857 is a critical authentication bypass vulnerability affecting Bosch products, allowing attackers to log in using a password hash instead of the actual password. This flaw, particularly dangerous when combined with CVE-2021-23858, enables unauthenticated remote attackers to achieve full compromise (confidentiality, integrity, availability) with low attack complexity. Despite its CVSS score of 9.8, there is currently no public exploit code (Metasploit, Nuclei, ExploitDB) and minimal community discussion or media coverage, indicating a low observed exploitation status.

Impacted Technologies

VendorProductVersion(s)CPE
<= 12CPE matchmatch criteria
cpe:2.3:o:bosch:rexroth_indramotion_mlc_l20_firmware:*:*:*:*:*:*:*:*
<= 12CPE matchmatch criteria
cpe:2.3:o:bosch:rexroth_indramotion_mlc_l40_firmware:*:*:*:*:*:*:*:*
<= 12CPE matchmatch criteria
cpe:2.3:o:bosch:rexroth_indramotion_mlc_l25_firmware:*:*:*:*:*:*:*:*
<= 12CPE matchmatch criteria
cpe:2.3:o:bosch:rexroth_indramotion_mlc_l45_firmware:*:*:*:*:*:*:*:*
<= 12CPE matchmatch criteria
cpe:2.3:o:bosch:rexroth_indramotion_mlc_l65_firmware:*:*:*:*:*:*:*:*

CVSS Data

CVSS version used by this source: 3.1

10.0CRITICAL

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:H

Attack Vector
NETWORK
Attack Complexity
LOW
Privileges Required
NONE
User Interaction
NONE
Scope
CHANGED
Confidentiality Impact
HIGH
Integrity Impact
HIGH
Availability Impact
HIGH
Exploitability Score
3.9
Impact Score
6.0
CvssVersion
3.1

Exploit Intelligence

EPSS Score
1.19%
Probability of exploitation in next 30 days
EPSS Percentile
64.8%
Percentile rank of EPSS score among Peer Group
As of 2026-07-27
Model: v2026.06.15
This CVE's current EPSS score of 0.0119 is in the 51st percentile among its peer group of 36,897 CVEs.

Social Chatter

The average CVE in this peer group has 0.0 Twitter, 0.1 Reddit, 0.3 Bluesky, 0.3 Mastodon, and 2.4 GitHub mentions.

Media Mentions

No media coverage found for this CVE.

The average CVE in this peer group has 0.3 InfoSec Media, 0.0 Vendor Blog, and 0.0 Security Researcher mentions.

Remediation

Vendor Patches (6)

cephvendor investigatingvia llm_extracted
d-linkvendor investigatingvia llm_extracted
humansignalvendor investigatingvia llm_extracted
hyperledgervendor investigatingvia llm_extracted
m2teamvendor investigatingvia llm_extracted
roundcubevendor investigatingvia llm_extracted

Vendor Advisories (6)

hyperledgerllm-hyperledger-864581d9e558af3fCRITICAL

Multiple vulnerabilities in Rexroth IndraMotion and IndraLogic series

Oct 4, 2021
roundcubellm-roundcube-ee750bd78125d604CRITICAL

Multiple vulnerabilities in Rexroth IndraMotion and IndraLogic series

Oct 4, 2021
cephllm-ceph-17afac0b4332a84aCRITICAL

Multiple vulnerabilities in Rexroth IndraMotion and IndraLogic series

Oct 4, 2021
humansignalllm-humansignal-43c6f9e339ad8c60CRITICAL

Multiple vulnerabilities in Rexroth IndraMotion and IndraLogic series

Oct 4, 2021
d-linkllm-d-link-8224cf43ec0e88e6CRITICAL

Multiple vulnerabilities in Rexroth IndraMotion and IndraLogic series

Oct 4, 2021
m2teamllm-m2team-a4ab167609e652f0CRITICAL

Multiple vulnerabilities in Rexroth IndraMotion and IndraLogic series

Oct 4, 2021

References

psirt.bosch.com / security-advisories/bosch-sa-741752.html
Vendor Advisory