CVE-2021-38451Network attack vector

Process-memory disclosure via unsanitized CSC offset

Published Oct 22, 2021 · Updated Sep 17, 2024

Out-of-bounds read in AUVESY versiondog 8.0 and earlier allows remote authenticated users to disclose process memory through CSC requests. The CSC dispatcher accepts caller-supplied function parameters without validating the offset before using it to read memory beyond the intended boundary. Exploitation requires a CSC client session, low privileges, user interaction, and a crafted offset; the documented impact is memory disclosure only.

CVSS severity4.8
Medium
EPSS probability0.68%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Out-of-bounds read in AUVESY versiondog 8.0 and earlier allows remote authenticated users to disclose process memory through CSC requests. The CSC dispatcher accepts caller-supplied function parameters without validating the offset before using it to read memory beyond the intended boundary. Exploitation requires a CSC client session, low privileges, user interaction, and a crafted offset; the documented impact is memory disclosure only.

The record

CVE
CVE-2021-38451
Published
Oct 22, 2021
Updated
Sep 17, 2024
Vendor
AUVESY
Product
versiondog
Classifications
CWE-125
Attack vector
network
Privileges
authenticated

Timeline

How it unfolded

  1. Oct 22, 2021CVE publishedPublication date reported by the CVE source.
  2. Sep 17, 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?

Compare these published version ranges with your installed build and any vendor patches.

  1. Affected versionversion=All <=8.0

What conditions does exploitation require?

Attack vectornetwork
Required privilegesauthenticated

What is affected?

AUVESY · versiondogversion=All <=8.0

Published CVSS scores

3.5NVDAV:N/AC:M/Au:S/C:P/I:N/A:N
4.8CISACVSS:3.0/AV:N/AC:H/PR:L/UI:R/S:U/C:H/I:N/A:N
5.7NVDCVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:U/C:H/I:N/A:N

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)
Vectornetwork
Privilegesauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-125Out-of-bounds Read

Public exploit references

No public exploit references are available in this record.

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Technologies

Your stack

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Your stack

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