CVE-2023-28506Public exploitNetwork attack vector

Authenticated code execution via unchecked account copy

Published Mar 29, 2023 · Updated Feb 18, 2025

Stack buffer overflow in Rocket Software UniData and UniVerse allows remote authenticated users to execute code via crafted udcs requests. The udapi_slave change_account() function passes a user-supplied account length to u2memcpy, copying into a fixed 296-byte stack buffer without a bounds check. A valid product login is required unless the separately documented authentication bypass is present; exploitation runs code as that user, while the published proof of concept crashes the forked service.

CVSS severity8.8
High
EPSS probability0.91%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Stack buffer overflow in Rocket Software UniData and UniVerse allows remote authenticated users to execute code via crafted udcs requests. The udapi_slave change_account() function passes a user-supplied account length to u2memcpy, copying into a fixed 296-byte stack buffer without a bounds check. A valid product login is required unless the separately documented authentication bypass is present; exploitation runs code as that user, while the published proof of concept crashes the forked service.

The record

CVE
CVE-2023-28506
Published
Mar 29, 2023
Updated
Feb 18, 2025
Vendor
Rocket Software
Product
UniData
Classifications
CWE-787, CWE-120, T1190
Attack vector
network
Privileges
authenticated

Timeline

How it unfolded

  1. Mar 29, 2023CVE publishedPublication date reported by the CVE source.
  2. Feb 18, 2025Record 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=0 <8.2.43.3003

What conditions does exploitation require?

Attack vectornetwork
Required privilegesauthenticated

What is affected?

Rocket Software · UniDataversion=0 <8.2.43.3003
Rocket Software · UniVerseversion=0 <11.3.5.1001; version=0 <12.2.1.2002

Published CVSS scores

8.8NISTCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
8.8CISA-ADPCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

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
Privilegesauthenticated
Known exploitationUnconfirmed
Public exploitPublished

Weakness, pattern, technique

CWE-787Out-of-bounds Write
CWE-120Buffer Copy without Checking Size of Input ('Classic Buffer Overflow')
T1190Exploit Public-Facing Application

Public exploit references

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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