CVE-2021-40376

SYSTEM access via unauthenticated named pipe calls

Published Mar 7, 2022 · Updated Aug 4, 2024

Improper authentication in otris Update Manager 1.2.1.0 allows local users to gain SYSTEM access via unauthenticated .NET named-pipe calls. Exposed interfaces accept unauthenticated requests over a .NET named pipe, while WsHTTPBinding can expose the same service to HTTP traffic on TCP port 9000. Local access is sufficient for privilege escalation; a remote path is described as possible when that HTTP binding is reachable.

CVSS severity7.8
High
EPSS probability0.40%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Improper authentication in otris Update Manager 1.2.1.0 allows local users to gain SYSTEM access via unauthenticated .NET named-pipe calls. Exposed interfaces accept unauthenticated requests over a .NET named pipe, while WsHTTPBinding can expose the same service to HTTP traffic on TCP port 9000. Local access is sufficient for privilege escalation; a remote path is described as possible when that HTTP binding is reachable.

The record

CVE
CVE-2021-40376
Published
Mar 7, 2022
Updated
Aug 4, 2024
Vendor
Unknown vendor
Product
Unknown product
Classifications
CWE-287, T1068
Attack vector
local
Privileges
unauthenticated

Timeline

How it unfolded

  1. Mar 7, 2022CVE publishedPublication date reported by the CVE source.
  2. Aug 4, 2024Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

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Is a vulnerable build present?

Affected buildAffected product and version details are unavailable.

What conditions does exploitation require?

Attack vectorlocal
Required privilegesunauthenticated

What is affected?

Affected products and versions are unavailable in this record.

Published CVSS scores

7.8NVDCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
7.2NVDAV:L/AC:L/Au:N/C:C/I:C/A:C

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.

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No observations available

Sep 10, 2026Sep 16, 2026
Latest reporting daySep 16, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectorlocal
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-287Improper Authentication
T1068Exploitation for Privilege Escalation

Public exploit references

No public exploit references are available in this record.

Labels summarize the accepted research assessment. They do not indicate a test against your environment.

Technologies

Your stack

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Your stack

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