CVE-2021-29095Network attack vector

Authenticated code execution via uninitialized raster pointers

Published Mar 25, 2021 · Updated Sep 16, 2024

Uninitialized-pointer flaws in Esri ArcGIS Server 10.8.1 and earlier allow remote authenticated users to execute service-account code. Image-service and raster-analytics parsers leave pointers uninitialized while processing specially crafted files, and later pointer access enables code execution. Exploitation requires specialized authenticated permissions and user interaction, with successful code running under the ArcGIS Server service account.

CVSS severity6.4
Medium
EPSS probability0.88%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Uninitialized-pointer flaws in Esri ArcGIS Server 10.8.1 and earlier allow remote authenticated users to execute service-account code. Image-service and raster-analytics parsers leave pointers uninitialized while processing specially crafted files, and later pointer access enables code execution. Exploitation requires specialized authenticated permissions and user interaction, with successful code running under the ArcGIS Server service account.

The record

CVE
CVE-2021-29095
Published
Mar 25, 2021
Updated
Sep 16, 2024
Vendor
Esri
Product
ArcGIS Server
Classifications
CWE-824, T1190
Attack vector
network
Privileges
authenticated

Timeline

How it unfolded

  1. Mar 25, 2021CVE publishedPublication date reported by the CVE source.
  2. Sep 16, 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=10.8.1 <10.9

What conditions does exploitation require?

Attack vectornetwork
Required privilegesauthenticated

What is affected?

Esri · ArcGIS Serverversion=10.8.1 <10.9

Published CVSS scores

6.8NIST NVDCVSS:3.1/AV:N/AC:L/PR:H/UI:R/S:U/C:H/I:H/A:H
6.4EsriCVSS:3.1/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

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
Privilegesauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-824Access of Uninitialized Pointer
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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