Critical OpenWrt DHCPv6 Flaw Could Let Unauthenticated Attackers Run Code as Root

OpenWrt has shipped version 24.10.8 to close a critical DHCPv6 stack overflow and a wider set of remotely triggerable flaws in network services enabled by default. The critical issue, tracked as CVE-2026-53921 and rated 9.8 on CVSS 3.1 in OpenWrt's GitHub advisory, lets an unauthenticated attacke...

UBUNTU-CVE-2026-64248

In the Linux kernel, the following vulnerability has been resolved: MIPS: smp: report dying CPU to RCU in stopthiscpu smpsendstop parks all secondary CPUs in stopthiscpu. The function marks the CPU offline for the scheduler via setcpuonlinefalse but never informs RCU, so RCU keeps expecting a...

EUVD-2026-48657

In the Linux kernel, the following vulnerability has been resolved: MIPS: smp: report dying CPU to RCU in stopthiscpu smpsendstop parks all secondary CPUs in stopthiscpu. The function marks the CPU offline for the scheduler via setcpuonlinefalse but never informs RCU, so RCU keeps expecting a...

CVE-2026-62947

OpenWrt is a Linux operating system targeting embedded devices. Prior to 25.12.5, the cgi-download handler in cgi-io authorizes the requested path against the caller's ubus session file ACL before canonicalization, and rpcd session.c uses fnmatch without FNMPATHNAME, allowing traversal such as an...

CVE-2026-62948

OpenWrt is a Linux operating system targeting embedded devices. Prior to 25.12.5, odhcpd writes a DHCPv6 client FQDN option 39 hostname into /tmp/odhcpd.leases through src/statefiles.c statefileswritestate6 and statefileswritestate4 without escaping, allowing newline injection of forged lease lin...

CVE-2026-62947 OpenWrt: ACL bypass and arbitrary root file read via cgi-io cgi-download

OpenWrt is a Linux operating system targeting embedded devices. Prior to 25.12.5, the cgi-download handler in cgi-io authorizes the requested path against the caller's ubus session file ACL before canonicalization, and rpcd session.c uses fnmatch without FNMPATHNAME, allowing traversal such as an...

CVE-2026-62947

CVE-2026-62947 affects OpenWrt prior to 25.12.5 through the cgi-download handler in cgi-io, where the requested path is validated against the caller’s ubus session file ACL before canonicalization. The rpcd session.c uses fnmatch() without FNM_PATHNAME, enabling traversal such as an allowed wildc...

EUVD-2026-44756

OpenWrt is a Linux operating system targeting embedded devices. Prior to 25.12.5, the cgi-download handler in cgi-io authorizes the requested path against the caller's ubus session file ACL before canonicalization, and rpcd session.c uses fnmatch without FNMPATHNAME, allowing traversal such as an...

CVE-2026-62947 OpenWrt: ACL bypass and arbitrary root file read via cgi-io cgi-download

OpenWrt is a Linux operating system targeting embedded devices. Prior to 25.12.5, the cgi-download handler in cgi-io authorizes the requested path against the caller's ubus session file ACL before canonicalization, and rpcd session.c uses fnmatch without FNMPATHNAME, allowing traversal such as an...

EUVD-2026-44748

OpenWrt is a Linux operating system targeting embedded devices. Prior to 25.12.5, odhcpd writes a DHCPv6 client FQDN option 39 hostname into /tmp/odhcpd.leases through src/statefiles.c statefileswritestate6 and statefileswritestate4 without escaping, allowing newline injection of forged lease lin...

CVE-2026-62948

OpenWrt odhcpd/LuCI vulnerability CVE-2026-62948: Before 25.12.5, the DHCPv6 client FQDN option 39 hostname is written into /tmp/odhcpd.leases without escaping, allowing newline injection of forged lease lines. LuCI displays these lines in the Active DHCPv6 Leases page via rpcd-mod-luci getDHCPLe...

CVE-2026-62948 OpenWrt odhcpd/LuCI: unauthenticated DHCPv6 client can inject lease-file lines via FQDN hostname → stored XSS in the LuCI admin UI

OpenWrt is a Linux operating system targeting embedded devices. Prior to 25.12.5, odhcpd writes a DHCPv6 client FQDN option 39 hostname into /tmp/odhcpd.leases through src/statefiles.c statefileswritestate6 and statefileswritestate4 without escaping, allowing newline injection of forged lease lin...

PT-2026-60254

Name of the Vulnerable Software and Affected Versions OpenWrt versions prior to 25.12.5 Description The odhcpd component writes a DHCPv6 client FQDN option 39 hostname into the /tmp/odhcpd.leases file via the statefiles write state6 and statefiles write state4 functions without proper escaping...

CVE-2026-59260

OpenWrt luci-app-samba4 read ACL grants file.exec permission on /usr/sbin/smbd, allowing authenticated delegated users to execute the Samba daemon with caller-controlled command-line arguments. Attackers can pass arbitrary Samba global options such as message command to a root smbd process,...

EUVD-2026-43233

OpenWrt luci-app-samba4 read ACL grants file.exec permission on /usr/sbin/smbd, allowing authenticated delegated users to execute the Samba daemon with caller-controlled command-line arguments. Attackers can pass arbitrary Samba global options such as message command to a root smbd process,...

CVE-2026-59260 OpenWrt luci-app-samba4 read ACL remote code execution via smbd

OpenWrt luci-app-samba4 read ACL grants file.exec permission on /usr/sbin/smbd, allowing authenticated delegated users to execute the Samba daemon with caller-controlled command-line arguments. Attackers can pass arbitrary Samba global options such as message command to a root smbd process,...

CVE-2026-59260 OpenWrt luci-app-samba4 read ACL remote code execution via smbd

OpenWrt luci-app-samba4 read ACL grants file.exec permission on /usr/sbin/smbd, allowing authenticated delegated users to execute the Samba daemon with caller-controlled command-line arguments. Attackers can pass arbitrary Samba global options such as message command to a root smbd process,...

CVE-2026-59260

OpenWrt luci-app-samba4 contains an ACL misconfiguration that grants file.exec permission on /usr/sbin/smbd. This allows authenticated delegated users to execute the Samba daemon with caller-controlled command-line arguments, enabling remote code execution via the SMB processing path. The vulnera...

PT-2026-57557

Name of the Vulnerable Software and Affected Versions luci-app-samba4 affected versions not specified Description An issue in the read Access Control List ACL grants file.exec permission on /usr/sbin/smbd. This allows authenticated delegated users to execute the Samba daemon with command-line...

CVE-2026-55490

OpenWrt is a Linux operating system targeting embedded devices. Before v25.12.5, an integer underflow in handlesenda of the Emergency Access Daemon allows any unauthenticated attacker on the local network to crash the daemon by sending a single crafted UDP packet. The message length underflows...