Linuxsecurity Critical OpenSSH Vulnerability Allows Privilege Escalation on Ubuntu Systems
Article Content
- •OpenSSH vulnerability allows privilege escalation via legacy scp protocol.
- •Affected systems include Ubuntu 16.04, with a critical advisory issued (USN-8514-1).
- •Immediate system updates are necessary to mitigate the risk of exploitation.
A critical vulnerability in OpenSSH has been identified, affecting Ubuntu systems, particularly version 16.04. The flaw arises from improper handling of file permissions when downloading files as root using the legacy scp protocol without the preserve-mode option. This vulnerability could allow attackers to install setuid or setgid files, leading to potential privilege escalation. The issue is documented under USN-8514-1 and has been assigned the CVE-2026 identifier. Users are advised to update their systems to mitigate the risk. Ubuntu Pro users benefit from extended security coverage for this vulnerability. A standard system update is recommended for all affected users to ensure protection against exploitation.
Ask AI about this cluster
Answers cite the sources they use
Timeline
More articles in this cluster (7)
Following this threat?
Track Ubuntu 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…