CVE-2026-2812Network attack vector

Unauthenticated Services Directory disablement via administrative endpoint

Published May 20, 2026 · Updated May 20, 2026

Missing authentication in ArcGIS Server 11.1 through 11.5 allows remote attackers to disable the Services Directory interface. An undocumented administrative endpoint accepts a crafted unauthenticated request and changes the setting controlling the web browsing interface. No account or user interaction is required; the effect is limited to that interface and does not interrupt services, API access, or data confidentiality.

CVSS severity5.3
Medium
EPSS probability0.36%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Missing authentication in ArcGIS Server 11.1 through 11.5 allows remote attackers to disable the Services Directory interface. An undocumented administrative endpoint accepts a crafted unauthenticated request and changes the setting controlling the web browsing interface. No account or user interaction is required; the effect is limited to that interface and does not interrupt services, API access, or data confidentiality.

The record

CVE
CVE-2026-2812
Published
May 20, 2026
Updated
May 20, 2026
Vendor
Esri
Product
ArcGIS Server
Classifications
CWE-306
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. May 20, 2026CVE publishedPublication date reported by the CVE source.
  2. May 20, 2026Record 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=11.1 <=12.0

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

Esri · ArcGIS Serverversion=11.1 <=12.0

Published CVSS scores

5.3Environmental Systems Research Institute, Inc.CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:N

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 9, 2026Sep 15, 2026
Latest reporting daySep 15, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-306Missing Authentication for Critical Function

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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