CVE-2021-38479Network attack vector

Arbitrary memory write via trusted remote pointers

Published Oct 22, 2021 · Updated Sep 16, 2024

Out-of-bounds write in AUVESY versiondog 8.0 and earlier allows remote attackers to alter memory via crafted API requests. Multiple remotely callable API function codes accept raw pointers and treat their resolved addresses as valid in-bounds memory without validation. Exploitation requires user interaction and permits arbitrary data writes at attacker-chosen resolved addresses; no disclosure or service interruption is reported.

CVSS severity6.5
Medium
EPSS probability0.90%
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 write in AUVESY versiondog 8.0 and earlier allows remote attackers to alter memory via crafted API requests. Multiple remotely callable API function codes accept raw pointers and treat their resolved addresses as valid in-bounds memory without validation. Exploitation requires user interaction and permits arbitrary data writes at attacker-chosen resolved addresses; no disclosure or service interruption is reported.

The record

CVE
CVE-2021-38479
Published
Oct 22, 2021
Updated
Sep 16, 2024
Vendor
AUVESY
Product
versiondog
Classifications
CWE-787, T1210
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Oct 22, 2021CVE publishedPublication date reported by the CVE source.
  2. Sep 16, 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 privilegesunauthenticated

What is affected?

AUVESY · versiondogversion=All <=8.0

Published CVSS scores

5.0NISTAV:N/AC:L/Au:N/C:N/I:P/A:N
6.5ICS-CERTCVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:H/A:N
7.5NISTCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/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.

Daily unique IPsNo honeypot observations are available for this CVE in the selected window.

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
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-787Out-of-bounds Write
T1210Exploitation of Remote Services

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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