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CVE-2026-62948

CRITICAL Exploitation: PoC
9.6
CVSS 3.1
Description
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 statefiles_write_state6() and statefiles_write_state4() without escaping, allowing newline injection of forged lease lines that LuCI rpcd-mod-luci getDHCPLeases displays through htdocs/luci-static/resources/view/status/include/40_dhcp.js and htdocs/luci-static/resources/luci.js dom.append as live HTML in the Active DHCPv6 Leases admin page. This vulnerability is fixed in 25.12.5.

Metadata

CVE ID
CVE-2026-62948
State
PUBLISHED
Assigner
GitHub_M
Reserved
2026-07-14 22:32 UTC
Published
2026-07-15 17:50 UTC
Last updated
2026-07-15 18:08 UTC
Primary CWE
CWE-79
CWE-79: Improper Neutralization of Input During Web Page Gen…
Vendor / Product
openwrt / openwrt
Sources
cve.org  ·  NVD

Severity & Metrics

9.6 CRITICAL CVSS 3.1
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:H/I:H/A:H
SSVC — CISA Coordinator
Exploitation
PoC
Automatable
no
Tech. Impact
total
Affected products (1)
VendorProductPlatformVersions
openwrt openwrt — < 25.12.5
Weakness (CWE)
CWESourceDescription
CWE-117 cna CWE-117: Improper Output Neutralization for Logs
CWE-150 cna CWE-150: Improper Neutralization of Escape, Meta, or Control Sequences
CWE-79 cna CWE-79: Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')
CVSS scores (1)
ScoreSeverityVersionSourceVector
9.6 CRITICAL 3.1 cna CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:H/I:H/A:H
References (5)
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