CVE-2021-29093Network attack vector

Code execution via crafted-file use-after-free

Published Mar 25, 2021 · Updated Sep 17, 2024

Use-after-free in Esri ArcGIS Server 10.9 and earlier allows remote authenticated users to execute code through a crafted raster file. Image-service or raster-analytics processing triggers the memory-safety error, but Esri has not disclosed the affected parser or freed-object reuse operation. Reaching the parser requires specialized permissions and user interaction; successful exploitation runs code as the service account.

CVSS severity6.4
Medium
EPSS probability0.95%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Use-after-free in Esri ArcGIS Server 10.9 and earlier allows remote authenticated users to execute code through a crafted raster file. Image-service or raster-analytics processing triggers the memory-safety error, but Esri has not disclosed the affected parser or freed-object reuse operation. Reaching the parser requires specialized permissions and user interaction; successful exploitation runs code as the service account.

The record

CVE
CVE-2021-29093
Published
Mar 25, 2021
Updated
Sep 17, 2024
Vendor
Esri
Product
ArcGIS Server
Classifications
CWE-416, T1190
Attack vector
network
Privileges
authenticated

Timeline

How it unfolded

  1. Mar 25, 2021CVE publishedPublication date reported by the CVE source.
  2. Sep 17, 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=All <=10.9

What conditions does exploitation require?

Attack vectornetwork
Required privilegesauthenticated

What is affected?

Esri · ArcGIS Serverversion=All <=10.9

Published CVSS scores

6.4EsriCVSS:3.0/AV:N/AC:H/PR:H/UI:R/S:U/C:H/I:H/A:H
5.6EsriCVSS:3.1/AV:N/AC:H/PR:H/UI:R/S:U/C:H/I:H/A:H/E:U/RL:O/RC:C
6.0NIST NVDAV:N/AC:M/Au:S/C:P/I:P/A:P
6.8NIST NVDCVSS:3.1/AV:N/AC:L/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 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 exploitUnconfirmed

Weakness, pattern, technique

CWE-416Use After Free
T1190Exploit Public-Facing Application

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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