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Adobe Security Bulletin

Last updated on Apr 14, 2026

Security update available for Adobe Connect | APSB26-37

Bulletin ID
Date published
Priority
APSB26-37
April 14, 2026
3
style
grid width 12

Summary

Adobe has released a security update for Adobe Connect. This update resolves critical and important vulnerabilities that could lead to arbitrary code execution and privilege escalation.

Adobe is not aware of any exploits in the wild for any of the issues addressed in these updates.

Affected Product Versions

Product
Version
Platform
Adobe Connect
12.10 and earlier
Windows and macOS
Adobe Connect Desktop Application
2025.3 and earlier
Windows and macOS
style
grid width 12

Solution

Adobe categorizes these updates with the following priority ratings and recommends users update their installation to the latest version.

Product
Version
Platform
Priority
Availability
Adobe Connect
12.11
Windows and macOS
3
Release Notes
Adobe Connect Desktop Application
2025.9
Windows
3
Release Notes
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grid width 12

Vulnerability Details

Vulnerability category
Vulnerability impact
Severity
CVSS base score
CVSS vector
CVE number
Deserialization of Untrusted Data (CWE-502)
Arbitrary code execution
Critical
9.6
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:H/I:H/A:H
CVE-2026-27302
Deserialization of Untrusted Data (CWE-502)
Arbitrary code execution
Critical
9.6
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:H/I:H/A:H
CVE-2026-27303
Cross-site Scripting (Reflected XSS) (CWE-79)
Arbitrary code execution
Critical
9.3
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:H/I:H/A:N
CVE-2026-27243
Cross-site Scripting (Reflected XSS) (CWE-79)
Arbitrary code execution
Critical
9.3
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:H/I:H/A:N
CVE-2026-27245
Cross-site Scripting (DOM-based XSS) (CWE-79)
Arbitrary code execution
Critical
9.3
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:H/I:H/A:N
CVE-2026-27246
Deserialization of Untrusted Data (CWE-502)
Arbitrary code execution
Critical
9.3
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:H/I:H/A:N
CVE-2026-34615
Cross-site Scripting (XSS) (CWE-79)
Privilege escalation
Critical
8.7
CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:H/I:H/A:N
CVE-2026-34617
Cross-site Scripting (Reflected XSS) (CWE-79)
Arbitrary code execution
Important
6.1
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N
CVE-2026-21331
Cross-site Scripting (Reflected XSS) (CWE-79)
Arbitrary code execution
Important
6.1
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N
CVE-2026-34614

Acknowledgments

Adobe would like to thank the following researchers for reporting these issues and for working with Adobe to help protect our customers:

  • Laish (a_l) -- CVE-2026-27302, CVE-2026-27303, CVE-2026-34615
  • yjdfy -- CVE-2026-21331, CVE-2026-34614
  • green-jam -- CVE-2026-27243, CVE-2026-27245, CVE-2026-27246
  • remot3 -- CVE-2026-34617

NOTE: Adobe has a public bug bounty program with Intigriti. If you are interested in working with Adobe as an external security researcher, please check out https://app.intigriti.com/programs/adobe/adobepublic/detail.

For more information, visit https://www.adobe.com/trust/security/bug-bounty.html, or email PSIRT@adobe.com.

CardTitle
APSB26-37
CardDescription
Priority 3 Security update
CardImage
Adobe
Created
2026-04-14
Tags
caas:content-type/documentation,caas:trust-center/security-bulletin,caas:products/connect
PrimaryTag
caas:content-type/article
Details
caas:mnemonics/connect
Arbitrary
search: CVE-2026-27302 CVE-2026-27303 CVE-2026-27243 CVE-2026-27245 CVE-2026-27246 CVE-2026-34615 CVE-2026-34617 CVE-2026-21331 CVE-2026-34614