CVE-2026-27243Network attack vector

Victim-session script execution via reflected web input

Published Apr 14, 2026 · Updated Apr 14, 2026

Reflected XSS in Adobe Connect 12.10 and earlier and its desktop app 2025.3 and earlier allows remote attackers to run browser scripts. Adobe identifies crafted URLs as the input vector but has not published the vulnerable page, parameter, or missing output-encoding operation. Exploitation requires a victim to open the crafted URL, after which the script runs in that victim's browser session and can access or alter session data.

CVSS severity9.3
Critical
EPSS probability0.30%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Reflected XSS in Adobe Connect 12.10 and earlier and its desktop app 2025.3 and earlier allows remote attackers to run browser scripts. Adobe identifies crafted URLs as the input vector but has not published the vulnerable page, parameter, or missing output-encoding operation. Exploitation requires a victim to open the crafted URL, after which the script runs in that victim's browser session and can access or alter session data.

The record

CVE
CVE-2026-27243
Published
Apr 14, 2026
Updated
Apr 14, 2026
Vendor
Adobe
Product
Adobe Connect
Classifications
CWE-79, T1204.001
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Apr 14, 2026CVE publishedPublication date reported by the CVE source.
  2. Apr 14, 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=0 <=12.10

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

Adobe · Adobe Connectversion=0 <=12.10

Published CVSS scores

9.3Adobe Systems IncorporatedCVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:H/I:H/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.

Daily unique IPsNo honeypot observations are available for this CVE in the selected window.

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-79Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')
T1204.001User Execution: Malicious Link

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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