CVE-2020-13571Public exploitNetwork attack vector

Code execution via unchecked SGI RLE length

Published Feb 10, 2021 · Updated Aug 4, 2024

An out-of-bounds write in Accusoft ImageGear 19.8 allows attackers to execute code by loading a crafted SGI RLE image. The sgiread function passes an attacker-controlled RLE length-table value to IO_read without checking it against a buffer allocated from the image width. A host application must pass the malformed image to ImageGear, after which memory corruption occurs in the host process context.

CVSS severity9.8
Critical
EPSS probability1.96%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

An out-of-bounds write in Accusoft ImageGear 19.8 allows attackers to execute code by loading a crafted SGI RLE image. The sgiread function passes an attacker-controlled RLE length-table value to IO_read without checking it against a buffer allocated from the image width. A host application must pass the malformed image to ImageGear, after which memory corruption occurs in the host process context.

The record

CVE
CVE-2020-13571
Published
Feb 10, 2021
Updated
Aug 4, 2024
Vendor
Accusoft
Product
ImageGear
Classifications
CWE-119, T1203
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Feb 10, 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=Accusoft ImageGear 19.8

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

Accusoft · ImageGearversion=Accusoft ImageGear 19.8

Published CVSS scores

6.8NIST NVDAV:N/AC:M/Au:N/C:P/I:P/A:P
8.8NIST NVDCVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H
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.

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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 exploitPublished

Weakness, pattern, technique

CWE-119Improper Restriction of Operations within the Bounds of a Memory Buffer
T1203Exploitation for Client Execution

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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