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Vulnerabilities/CVE-2026-27243Public Intelligence Dossier
Source: adobe · Limited verification•Last verified: •Collection Degraded
CVE-2026-27243Unknown / EvaluatingCRITICAL (raw)CVSS 9.3CWE-79

Adobe Connect versions 2025.3, 12.10 and earlier are affected by a reflected Cross-Site Scripting (XSS) vulnerability

Published: 14 Apr 2026•Last updated: 27 Oct 2026, 02:40 AM IST•Source identifier: psirt@adobe.com
Dossier completeness: source-provided sections 2 / 3 · rule guidance available. Missing source facts count as incomplete.
Official source
CISA KEV catalog
Unknown
KEV status was not determined.
CVSS score
9.3CRITICAL (raw)
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:H/I:H/A:N
Metric sourcepsirt@adobe.com
EPSS probability
0.3%0.003
Percentile23rd
Weakness type
CWE-79
No further CWE recorded
Remediation
Patch status unknown
No fixed version or KB recorded

Why It Matters

Analysis dossier

Why It Matters

Adobe Connect versions 2025.3, 12.10 and earlier are affected by a reflected Cross-Site Scripting (XSS) vulnerability. An attacker could exploit this vulnerability to inject malicious scripts into a web page, potentially gaining elevated access or control over the victim's account or session. 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.

SOC priority

High Severity / Review

Actively exploited (source statement)

Unknown

Publicly disclosed

Unknown

Risk basis: Microsoft or Microsoft-managed product relevance; CRITICAL severity; Critical source severity without confirmed exploitation

Affected Products & Remediation

2 source-backed products
Affected products and versions (source)
  • adobe connect · < 12.11; desktop application <= 2025.3; desktop application < 2025.9.15 · NVD CPE · Source
  • adobe connect desktop application · <= 2025.3; < 2025.9.15 · NVD CPE · Source
NVD applicability prerequisites: cpe:2.3:o:apple:macos:-:*:*:*:*:*:*:*, cpe:2.3:o:microsoft:windows:-:*:*:*:*:*:*:*. These are conditions, not proof that an environment is exposed or unaffected.
Recorded patch / KBNot provided by source

Vendor or catalog guidance (source)

Not provided by source

Known exploitation (source facts)

Only what a source states. Unknown means no source has said either way; it is not "not exploited".

CISA KEV
Unknown
Exploited (source statement)
Unknown
Publicly disclosed (source)
Unknown

Suggested hunting (rule-based inference)

SecOps Signal recommendation (rule-based inference). These steps are hunting hypotheses from the vulnerability class; they do not state or imply that exploitation occurred here or anywhere.

Matched cross-site-scripting (CWE-79); user-interaction-client (CVSS AV:N, CVSS UI:R)

Exposure

  1. Identify the affected web component and source-stated version range.Telemetry: Application inventory · The weakness class does not identify local deployment. · Rule cross-site-scripting
  2. Identify endpoints reporting this CVE, especially those used for email and web browsing.Telemetry: DeviceTvmSoftwareVulnerabilities · A network vector that needs user interaction points at user-facing client software. · Rule user-interaction-client

Exploitation evidence

  1. Review suspicious script-bearing requests to the affected endpoint.Telemetry: Application access logs · Requests are leads, not evidence that a user session was compromised. · Rule cross-site-scripting
Show more (2)

Exploitation evidence

  1. Review unusual child processes started by the affected client application on affected endpoints.Telemetry: DeviceProcessEvents · Hunting hypothesis from the CVSS vector; it does not show that exploitation occurred. · Rule user-interaction-client

Response

  1. Verify the source-stated patch and retest the affected component.Telemetry: Application change records · Remediation requires a local version or configuration check. · Rule cross-site-scripting

CISA KEV Record

CISA KEV status was not determined for this record.

Change History & Source Data

— No recorded material change

CNA / source
psirt@adobe.com
Record status · verification
UPDATED · NVD API
CPE
cpe:2.3:a:adobe:connect:*:*:*:*:*:-:*:*, cpe:2.3:o:apple:macos:-:*:*:*:*:*:*:*, cpe:2.3:o:microsoft:windows:-:*:*:*:*:*:*:*, cpe:2.3:a:adobe:connect_desktop_application:*:*:*:*:*:macos:*:*, cpe:2.3:a:adobe:connect_desktop_application:*:*:*:*:*:windows:*:*

Evidence & Provenance

2 public sources
helpx.adobe.comSource recordnvd.nist.govSource record

Linked by the query's stored exact CVE association. Review required tables and validation status before use.

Detection Hunting Query
Target: DeviceTvmSoftwareVulnerabilities•Defender XDR
Detect endpoints exposed to CVE-2026-27243
Purpose: Exposure assessment (Category: Exposure Check)Why linked: Query metadata names CVE-2026-27243
DeviceTvmSoftwareVulnerabilities| where CveId == "CVE-2026-27243"| project DeviceId, DeviceName, OSPlatform, OSVersion, SoftwareVendor, SoftwareName, SoftwareVersion, CveId, VulnerabilitySeverityLevel, RecommendedSecurityUpdate, RecommendedSecurityUpdateId| sort by VulnerabilitySeverityLevel desc
Schema Checked · Not runtime validatedSource: SecOps Signal deterministic template · Limited verificationStatic screening: Passed structure and schema checks; tenant execution is not verified.
Open KQL Library

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Correlated briefings

SecOps Signal surfaces public advisory facts only. A missing value means the source has not published it, not that your environment is unaffected. No tenant inventory is connected.