CVE-2020-7870Network attack vector

Memory corruption via insufficient parameter validation

Published Jun 29, 2021 · Updated Aug 4, 2024

Memory corruption in Unidocs ezPDF Editor and ezPDF Reader allows remote authenticated users to corrupt memory via an unspecified parameter. KrCERT and Unidocs identify insufficient parameter validation but do not disclose the parameter, affected component, or operation that corrupts memory. The official assessment requires high privileges and user interaction; no consequence beyond memory corruption is publicly described.

CVSS severity6.4
Medium
EPSS probability0.72%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Memory corruption in Unidocs ezPDF Editor and ezPDF Reader allows remote authenticated users to corrupt memory via an unspecified parameter. KrCERT and Unidocs identify insufficient parameter validation but do not disclose the parameter, affected component, or operation that corrupts memory. The official assessment requires high privileges and user interaction; no consequence beyond memory corruption is publicly described.

The record

CVE
CVE-2020-7870
Published
Jun 29, 2021
Updated
Aug 4, 2024
Vendor
Unidocs
Product
ezPDF Editor
Classifications
CWE-20, CWE-787
Attack vector
network
Privileges
admin

Timeline

How it unfolded

  1. Jun 29, 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

Compare your product and version with the public record. A matching version still requires validation against your environment.

Is a vulnerable build present?

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

  1. Affected versionversion=3 <=3.0.6.4

What conditions does exploitation require?

Attack vectornetwork
Required privilegesadmin

What is affected?

Unidocs · ezPDF Editorversion=3 <=3.0.6.4
Unidocs · ezPDF Readerversion=3 <=3.0.0.1

Published CVSS scores

7.2NVDCVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:H
6.5NVDAV:N/AC:L/Au:S/C:P/I:P/A:P
6.4KrCERT/CCCVSS:3.1/AV:N/AC:H/PR:H/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 9, 2026Sep 15, 2026
Latest reporting daySep 15, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesadmin
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-20Improper Input Validation
CWE-787Out-of-bounds Write

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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