CVE-2021-21083Network attack vector

Unauthenticated service interruption via unprotected DSRPReindexServlet

Published Jun 28, 2021 · Updated Sep 16, 2024

Improper access control in DSRPReindexServlet in Adobe Experience Manager allows remote attackers to interrupt the application service. The servlet accepts unauthenticated requests without enforcing the required access control; Adobe has not disclosed the operation that causes the interruption. Affected releases include AEM Cloud Service, 6.3.3.8 and earlier, 6.4.8.3 and earlier, and 6.5.7.0 and earlier; exploitation requires no account or user interaction and affects availability only.

CVSS severity7.5
High
EPSS probability1.98%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Improper access control in DSRPReindexServlet in Adobe Experience Manager allows remote attackers to interrupt the application service. The servlet accepts unauthenticated requests without enforcing the required access control; Adobe has not disclosed the operation that causes the interruption. Affected releases include AEM Cloud Service, 6.3.3.8 and earlier, 6.4.8.3 and earlier, and 6.5.7.0 and earlier; exploitation requires no account or user interaction and affects availability only.

The record

CVE
CVE-2021-21083
Published
Jun 28, 2021
Updated
Sep 16, 2024
Vendor
Adobe
Product
Adobe Experience Manager
Classifications
CWE-284, T1499
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Jun 28, 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=unspecified <=6.3.3.8
  2. Affected versionversion=unspecified <=6.4.8.3
  3. Affected versionversion=unspecified <=6.5.7.0
  4. Affected versionversion=unspecified <=AEM Cloud Service

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

Adobe · Adobe Experience Managerversion=unspecified <=6.3.3.8; version=unspecified <=6.4.8.3; version=unspecified <=6.5.7.0; version=unspecified <=AEM Cloud Service

Published CVSS scores

7.5AdobeCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/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-284Improper Access Control
T1499Endpoint Denial of Service

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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