CISA Alert: UnrealIRCd UnrealIRCd Exploit in the Wild (CVE-2026-114713)
UnrealIRCd UnrealIRCd contains an improper neutralization of delimiters vulnerability that allows any user on a network with two or more linked servers to inject server-to-server commands that are executed with server authority. This vulnerability has been officially cataloged in the CISA Known Exploited Vulnerabilities (KEV) database due to active in-the-wild exploitation by threat actors. Organizations are advised to remediate immediately.
- ✓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.
- ✓Enforce CISA BOD compliance guidelines and verify perimeter access controls.
- ✓Monitor SIEM logs for anomalous outbound network connections from UnrealIRCd.
- ✓Isolate public-facing management interfaces behind VPN with FIDO2 multi-factor authentication.