CVE-2020-6063Network attack vector

Code execution via signed PCX dimension comparison

Published Feb 11, 2020 · Updated Aug 4, 2024

Out-of-bounds write in Accusoft ImageGear 19.5.0 allows attackers to execute code when a crafted PCX file is processed. PCX_parse_header compares signed Xmin and Xmax values incorrectly, preventing their swap and causing uncompress_scan_line to allocate an undersized output buffer before expanding scan-line data. The host application must process a crafted PCX file with two-bit pixels and two color planes; code runs in that application's security context.

CVSS severity8.8
High
EPSS probability3.69%
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 Accusoft ImageGear 19.5.0 allows attackers to execute code when a crafted PCX file is processed. PCX_parse_header compares signed Xmin and Xmax values incorrectly, preventing their swap and causing uncompress_scan_line to allocate an undersized output buffer before expanding scan-line data. The host application must process a crafted PCX file with two-bit pixels and two color planes; code runs in that application's security context.

The record

CVE
CVE-2020-6063
Published
Feb 11, 2020
Updated
Aug 4, 2024
Vendor
Accusoft
Product
ImageGear
Classifications
CWE-131, CWE-787, T1204.002
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Feb 11, 2020CVE 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=Accusoft ImageGear 19.5.0

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

Accusoft · ImageGearversion=Accusoft ImageGear 19.5.0

Published CVSS scores

8.8NVDCVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H
6.8NVDAV:N/AC:M/Au:N/C:P/I:P/A:P
9.8Cisco TalosCVSS:3.0/AV:N/AC:L/PR:N/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
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-131Incorrect Calculation of Buffer Size
CWE-787Out-of-bounds Write
T1204.002Malicious File

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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