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TI-2026-21730 Aliases CVE-2026-27303GHSA-p85r-hffw-65q4

Adobe Connect | Deserialization of Untrusted Data (CWE-502)

Priority MEDIUM 44CWE-502Published · Updated

Key facts

Attack vector
Network
Privileges required
None
User interaction
Required
Attack complexity
Low
Impact type
Code execution
Confidentiality · integrity · availability
High · High · High
Fix status
Fixed

Attack profile from CVSS 3.1 · CNA. Fix status from CNA. Impact type from CWE-502.

Summary

Adobe Connect versions 2025.3, 12.10 and earlier are affected by a Deserialization of Untrusted Data vulnerability that could result in arbitrary code execution in the context of the current user. Exploitation of this issue requires user interaction in that a victim must visit a maliciously crafted URL or interact with a compromised web page. Scope is changed.

Why it matters now

Exploitation None reported CISA SSVC · not in CISA KEV
EPSS 0.00613 49th percentileScored 2026-11-07
Fix Fixed Adobe Connect (Adobe): 12.11Adobe Connect Desktop Application (Adobe): 2025.9

SSVC decision points

CISA ADP · SSVC 2.0.3

Exploitation
None
Automatable
No
Technical impact
Total

The decision (Track, Attend, Act) also depends on your mission and well-being impact; see CISA's SSVC guide.

Affected products

VendorProductAffected versionsFixed inStatusSource
AdobeAdobe Connectup to 12.1012.11Patch availableCNA
AdobeAdobe Connect Desktop Applicationup to 2025.32025.9Patch availableCNA
  • Adobe Connect VendorAdobe Affected up to 12.10 Fixed in 12.11 Patch available CNA
  • Adobe Connect Desktop Application VendorAdobe Affected up to 2025.3 Fixed in 2025.9 Patch available CNA

CPE configurations NVD · 5

CPEVersionsRoleVendor
cpe:2.3:a:adobe:connect:*:*:*:*:*:-:*:*before 12.11VulnerableAdobe
cpe:2.3:o:apple:macos:-:*:*:*:*:*:*:*not specified by NVDRunning onApple
cpe:2.3:o:microsoft:windows:-:*:*:*:*:*:*:*not specified by NVDRunning onMicrosoft
cpe:2.3:a:adobe:connect_desktop_application:*:*:*:*:*:macos:*:*up to 2025.3VulnerableAdobe
cpe:2.3:a:adobe:connect_desktop_application:*:*:*:*:*:windows:*:*before 2025.9.15VulnerableAdobe
  • cpe:2.3:a:adobe:connect:*:*:*:*:*:-:*:* Versions before 12.11 Vulnerable ·Adobe
  • cpe:2.3:o:apple:macos:-:*:*:*:*:*:*:* Versions not specified by NVD Running on ·Apple
  • cpe:2.3:o:microsoft:windows:-:*:*:*:*:*:*:* Versions not specified by NVD Running on ·Microsoft
  • cpe:2.3:a:adobe:connect_desktop_application:*:*:*:*:*:macos:*:* Versions up to 2025.3 Vulnerable ·Adobe
  • cpe:2.3:a:adobe:connect_desktop_application:*:*:*:*:*:windows:*:* Versions before 2025.9.15 Vulnerable ·Adobe

Remediation

  • Fix · CNA Adobe Connect (Adobe) Fixed in 12.11
  • Fix · CNA Adobe Connect Desktop Application (Adobe) Fixed in 2025.9

Fixed in the same release

Records fixed by the same vendor advisory or release, as the CNA lists them.

  • Advisory ·

    Adobe Connect, Adobe Connect Desktop Application — helpx.adobe.com/security/products/connect/apsb26-37.html

    8 records Highest priority Priority MEDIUM 6 MEDIUM, 2 LOW

    Other records, highest priority first

    • TI-2026-26861 Adobe Connect | Deserialization of Untrusted Data (CWE-502)Priority MEDIUM 43
    • TI-2026-21678 Adobe Connect | Cross-site Scripting (DOM-based XSS) (CWE-79)Priority MEDIUM 42
    • TI-2026-21677 Adobe Connect | Cross-site Scripting (Reflected XSS) (CWE-79)Priority MEDIUM 42
    Show all 8 records → Advisory →

Timeline

  1. 2026-10-02 Threatist record created from CVE-2026-27303
  2. 2026-10-03 Alias added: GHSA-p85r-hffw-65q4
  3. 2026-10-25 EPSS moved to the below the 50th percentile

References

Advisory 1

  • TI-2023-08504 Adobe Connect Improper Access Control Security feature bypass CVSS 3.1MEDIUM 5.3
  • TI-2021-17669 Adobe Connect Deserialization of Untrusted Data Remote Code Execution CVSS 3.0CRITICAL 9.8
  • TI-2018-09178 Improper authentication in Adobe Connect 9.7.5 and earlier CVSS 3.0CRITICAL 9.8
  • TI-2023-04295 RCE in Saphira Connect CVSS 3.1CRITICAL 9.8
  • TI-2023-04294 SQLi in Saphira Connect CVSS 3.1CRITICAL 9.8
  • TI-2017-08334 Server-side request forgery in Adobe Connect 9.6.2 and earlier versions CVSS 3.0CRITICAL 10.0
See all 82 →

Sources

This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences