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CVE-2021-21083

24
FAUCET Score

CVE-2021-21083 is an Improper Access Control vulnerability affecting Adobe Experience Manager (AEM) Cloud Service and specific versions of AEM 6.5, 6.4, and 6.3. An unauthenticated attacker can exploit this flaw remotely with low complexity, leading to a denial-of-service condition for the current user. Rated with a CVSS score of 7.5 (HIGH), this vulnerability poses a significant risk for availability. There is currently no evidence of active exploitation, publicly available exploit code, or significant community discussion surrounding this CVE.

Impacted Technologies

VendorProductVersion(s)CPE
<= 6.3.3.8CPE match
cpe:2.3:a:adobe:experience_manager:*:*:*:*:aem_cloud_service:*:*:*
<= 6.4.8.3CPE match
cpe:2.3:a:adobe:experience_manager:*:*:*:*:aem_cloud_service:*:*:*
<= 6.5.7.0CPE match
cpe:2.3:a:adobe:experience_manager:*:*:*:*:aem_cloud_service:*:*:*
<= 6.3.3.8CPE matchmatch criteria
cpe:2.3:a:adobe:experience_manager:*:*:*:*:*:*:*:*
>= 6.4.0.0, < 6.4.8.4CPE matchmatch criteria
cpe:2.3:a:adobe:experience_manager:*:*:*:*:*:*:*:*

CVSS Data

CVSS version used by this source: 3.1

7.5HIGH

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

Attack Vector
NETWORK
Attack Complexity
LOW
Privileges Required
NONE
User Interaction
NONE
Scope
UNCHANGED
Confidentiality Impact
NONE
Integrity Impact
NONE
Availability Impact
HIGH
Exploitability Score
3.9
Impact Score
3.6
CvssVersion
3.1

Exploit Intelligence

EPSS Score
1.98%
Probability of exploitation in next 30 days
EPSS Percentile
78.5%
Percentile rank of EPSS score among Peer Group
As of 2026-07-27
Model: v2026.06.15
This CVE's current EPSS score of 0.0198 is in the 62nd percentile among its peer group of 51,485 CVEs.

Social Chatter

The average CVE in this peer group has 0.0 Twitter, 0.0 Reddit, 0.1 Bluesky, 0.1 Mastodon, and 0.4 GitHub mentions.

Media Mentions

No media coverage found for this CVE.

The average CVE in this peer group has 0.1 InfoSec Media, 0.0 Vendor Blog, and 0.0 Security Researcher mentions.

Remediation

Vendor Patches (1)

adobevendor investigatingvia nvd_reference
View patch

References

helpx.adobe.com / security/products/experience-manager/apsb21-15.html
Vendor Advisory