Ncsc.Uk Cisco SD-WAN Zero-Day Exploited by Threat Actor Since 2023
Article Content
Browse articles 
A cyber threat actor has been exploiting a zero-day vulnerability (CVE-2026-20127) in Cisco Catalyst SD-WAN Controller since 2023. This vulnerability allows unauthenticated remote attackers to bypass authentication and gain administrative privileges, potentially leading to long-term persistence in affected systems. Cisco and the Australian Cyber Security Centre have reported the ongoing exploitation of this vulnerability.
Ask AI about this cluster
Answers cite the sources they use
Updated 204d ago How this analysis works
Timeline
2022-09-30
CVE-2022-20775 published
2023-01-01
Exploitation of CVE-2026-20127 began
2026-02-25
CVE-2026-20127 published
2026-02-25
CVE-2026-20127 added to CISA KEV for active exploitation
More articles in this cluster (104)
Following this threat?
Track Uat-8616, Cisco and CVE-2022-20775 in your own feed — you're alerted when they show up in new reporting, leak sites or exploitation.
Free account · no card needed
Continue Reading
CVE-2015-3306 Exploited in ProFTPD FTP Servers CVE-2015-3306, a vulnerability in ProFTPD 1.3.5, allows remote attackers to read and write arbitrary files using the SITE CPFR and SITE CPTO commands. This exploit can lead to unauthorized access and potential remote code execution, as the commands are executed with the privileges of the ProFTPD service. Active… 
Critical Authentication Bypass in Rejetto HFS Exploited Within 24 Hours Anthropic's Mythos model identified a critical authentication bypass in Rejetto HTTP File Server (HFS), tracked as CVE-2026-61500, allowing remote code execution. Discovered by Horizon3 researcher Zach Hanley, the flaw was revealed on September 27, 2026, and exploitation began within 24 hours, with attacks traced to…