CVE-2020-13534

Local privilege escalation via writable COM servers

Published Apr 9, 2021 · Updated Aug 4, 2024

Incorrect default permissions in Ocean Data Systems Dream Report 5 R20-2 allow local users to gain elevated Windows privileges. Two registered COM servers point to IDSEng.exe and IISToolbox.dll under C:\ODS, where the Everyone group receives full control. A local user can replace either server file and wait for its CLSID to be activated, causing attacker-supplied code to run with the invoking process privileges.

CVSS severity9.3
Critical
EPSS probability0.89%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Incorrect default permissions in Ocean Data Systems Dream Report 5 R20-2 allow local users to gain elevated Windows privileges. Two registered COM servers point to IDSEng.exe and IISToolbox.dll under C:\ODS, where the Everyone group receives full control. A local user can replace either server file and wait for its CLSID to be activated, causing attacker-supplied code to run with the invoking process privileges.

The record

CVE
CVE-2020-13534
Published
Apr 9, 2021
Updated
Aug 4, 2024
Vendor
Ocean Data Systems
Product
Dream Report
Classifications
CWE-276, T1574.001
Attack vector
local
Privileges
Unavailable

Timeline

How it unfolded

  1. Apr 9, 2021CVE 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?

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

  1. Affected versionversion=Dream Report 5 R20-2

What conditions does exploitation require?

Attack vectorlocal
Required privilegesUnavailable in this record.

What is affected?

Ocean Data Systems · Dream Reportversion=Dream Report 5 R20-2

Published CVSS scores

6.8NIST NVDAV:N/AC:M/Au:N/C:P/I:P/A:P
9.3Cisco TalosCVSS:3.0/AV:L/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:H
7.8NIST NVDCVSS:3.1/AV:L/AC:L/PR:N/UI:R/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)
Vectorlocal
PrivilegesUnavailable
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-276Incorrect Default Permissions
T1574.001Hijack Execution Flow: DLL

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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