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CISA has ordered government agencies to fix a serious Dell flaw within three days, which has been actively exploited since mid-2024.
Mandiant and the Google Threat Intelligence Group report that a vulnerability (CVE-2026-22769) involving hardcoded credentials in Dell’s RecoverPoint is being exploited by a suspected Chinese hacking group named UNC6201.
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UNC6201 accessed the victim’s network via CVE-2026-22769 and deployed various malware, including a new backdoor named Grimbolt. This backdoor uses a new compilation technique, making it more challenging to analyze than the older Brickstorm backdoor.
“Analysis of incident response engagements revealed that UNC6201, a suspected PRC-nexus threat cluster, has exploited this flaw since at least mid-2024 to move laterally, maintain persistent access, and deploy malware including SLAYSTYLE, BRICKSTORM, and a novel backdoor tracked as GRIMBOLT,”.
Feds ordered to prioritize CVE-2026-22769 patches
CISA added the vulnerability to its list of known security threats and instructed Federal Civilian Executive Branch agencies to protect their networks by Saturday, February 21.
“These types of vulnerabilities are frequent attack vectors for malicious cyber actors and pose significant risks to the federal enterprise,” CISA warned on Wednesday.
“Apply mitigations per vendor instructions, follow applicable BOD 22-01 guidance for cloud services, or discontinue use of the product if mitigations are unavailable.”
Last week, CISA also gave U.S. federal agencies three days to secure their BeyondTrust Remote Support instances against an actively exploited remote code execution vulnerability (CVE-2026-1731).
Hackers exploiting Dell zero-day flaw (CVE-2026-22769) since mid-2024
