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Advisory severityCritical9.8Vendor: MediumSynology Exploited CISA KEV

Critical [CVE-2026-111497] Synology-SA-26:15 Node2Shell

This critical-severity Synology advisory covers CVE-2026-111497 affecting Synology Chat Client.

Aggregated and source-linked by VulniPulse. Data sources, validation and limitations.

Synology-SA-26:15 Source published Source updated

VulniPulse record published

CVE-2026-111497
Affected products & platforms
SynologyUnclassified
Open source advisory

Summary

A vulnerability allows remote attackers to execute arbitrary code via susceptible versions of the following products: DSM packages: Synology Application Service Synology Calendar Synology Chat Server Synology Contacts Synology Drive Server Synology MailPlus Synology Meet Synology Office Synology Photos SRM package: VPN Plus Server Desktop utilities: Note Station Client Synology Chat Client Please refer to the ‘

Is CVE-2026-111497 exploited?

Yes. CISA lists CVE-2026-111497 in its Known Exploited Vulnerabilities catalog (added ), which means CISA has evidence of exploitation in the wild.

How do I fix CVE-2026-111497?

Upgrade to a fixed release named by Synology:

  • 1.2.5-0240

Confirm against the vendor advisory before you patch.

CISA Known Exploited Vulnerability

Listed:
Oct 27, 2026 · federal remediation due Nov 10, 2026
Required action:
Apply mitigations in accordance with vendor instructions, ensuring compliance with CISA’s BOD 26-04 Prioritizing Security Updates Based on Risk (see URL in Notes) guidance and CISA’s “Forensics Triage Requirements” (see URL in Notes). Follow applicable BOD 26-04 guidance for cloud services or discontinue use of the product if mitigations are unavailable. Stakeholders are responsible for evaluating each asset's internet exposure and ensuring adherence to BOD 26-04 patching guidelines.

KEV is a prioritization signal from CISA. Remediation detail comes from the vendor advisory.

Affected versions
  • Synology Chat Client before 1.2.5-0240

Official advisory · high-confidence parse· fetched 2 hours ago·verify at source

Fixed versions
  • 1.2.5-0240

Official advisory · high-confidence parse· fetched 2 hours ago·verify at source

Mitigation checklist

Recommended fix / mitigation
  • Upgrade the affected Synology product to a fixed release: 1.2.5-0240.

Official advisory · high-confidence parse· fetched 2 hours ago·verify at source

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