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Root access gives an attacker or administrator complete control of a Unix-like system, allowing changes to data, software, accounts, and security settings.

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Root access is unrestricted administrative control of a Unix or Linux system. The root account, or an equivalent privilege obtained through mechanisms such as sudo, can read or change nearly any file, alter system configuration, install software, and control running processes. Related uses of “root” may describe equivalent administrator privileges in containers, cloud workloads, network appliances, or mobile devices.

Because root privileges can bypass ordinary access controls, stolen administrative credentials or a vulnerability that enables privilege escalation can let an attacker modify security settings, access protected data, establish persistence, or disrupt the host. Organizations generally reduce exposure by disabling direct root login where practical, using named administrator accounts with least privilege, protecting privileged authentication with strong controls, and recording and reviewing elevation events. Vulnerability management should prioritize flaws that can grant local or remote root-level execution; during an incident, investigators must assess whether root access was obtained and treat the host’s integrity as potentially compromised.

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Bad Epoll (CVE-2026-46242) lets local attackers gain root on Linux and Android. The flaw was missed by AI but found by a security researcher. A newly disclosed Linux kernel vulnerability, named Bad Epoll (CVE-2026-46242), allows a local attacker with no special privileges to gain full root access on affected Linux systems and Android devices. Security updates are […]

DirtyClone: a Linux kernel privilege escalation that silently rewrites executables in memory, leaving no disk trace. Patch now. JFrog Security Research published a working exploit walkthrough on June 25 for CVE-2026-43503 (CVSS score of 8.8), a Linux kernel privilege escalation they call DirtyClone. It’s the fourth vulnerability in the DirtyFrag family, all sharing the same […]

Cisco addressed CVE-2026-20181, a critical ISE vulnerability that lets authenticated admins execute commands and gain root access. Cisco addressed a critical command execution vulnerability, tracked as CVE-2026-20181 (CVSS score of 9.1), affecting Identity Services Engine (ISE) and ISE-PIC. The flaw stems from improper validation of user-supplied input, allowing an authenticated attacker with administrative credentials to […]

Attackers are exploiting the critical CVE-2026-10520 flaw in Ivanti Sentry, compromising many internet-exposed gateways shortly after patches were released. Threat actors have started exploiting a maximum-severity OS command injection flaw in Ivanti Sentry, tracked as CVE-2026-10520, that allows remote code execution with root privileges. “An OS Command Injection vulnerability in Ivanti Sentry before the R10.5.2, R10.6.2 and R10.7.1 versions allows a remote […]

Attackers are exploiting the critical CVE-2026-10520 flaw in Ivanti Sentry, compromising many internet-exposed gateways shortly after patches were released. Threat actors have started exploiting a maximum-severity OS command injection flaw in Ivanti Sentry, tracked as CVE-2026-10520, that allows remote code execution with root privileges. “An OS Command Injection vulnerability in Ivanti Sentry before the R10.5.2, R10.6.2 and R10.7.1 versions allows a remote […]

A Linux kernel nf_tables bug lets local users gain root via use-after-free caused by a logic error; patch removes a single “!”. CVE-2026-23111 lives in nf_tables, the Linux kernel’s packet filtering framework. Exodus Intelligence researcher Oliver Sieber found the bug in early 2025 and chained it into a full local privilege escalation. The flaw was […]

Cisco warns of CVE-2026-20245 in SD-WAN Manager, a flaw that can lead to root access via file upload command injection; no patch or workaround yet. Cisco warns of a privilege escalation flaw, tracked as CVE-2026-20245 (CVSS base score of 7.8), in Cisco Catalyst SD-WAN Manager, the platform formerly known as SD-WAN vManage. An authenticated local […]

Rapid7 details a critical unauthenticated overflow in HP Poly VoIP phones that can lead to root RCE, with patches available for affected models. Rapid7’s latest disclosure on CVE-2026-0826 should get serious attention from anyone running HP Poly VoIP phones in an enterprise setting. It’s a critical unauthenticated stack-based buffer overflow that can give a remote […]