CVE-2026-62948
CRITICALOpenWrt < 25.12.5 odhcpd/LuCI - Stored Cross-Site Scripting
Title source: manualDescription
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.
References (5)
Core 5
Core References
X_Refsource_Confirm x_refsource_confirm
https://github.com/openwrt/openwrt/security/advisories/GHSA-hhmc-92hw-535f
X_Refsource_Misc x_refsource_misc
https://github.com/openwrt/odhcpd/pull/404
X_Refsource_Misc x_refsource_misc
https://github.com/openwrt/luci/commit/55379d04fcc3c605003a5001d6135cf02ae6048a
X_Refsource_Misc x_refsource_misc
https://github.com/openwrt/odhcpd/commit/68f382690bfaec56d5b1f31c3c31c48bcb642e3a
X_Refsource_Misc x_refsource_misc
https://github.com/openwrt/openwrt/releases/tag/v25.12.5
Scores
CVSS v3
9.6
EPSS
0.0036
EPSS Percentile
28.5%
Attack Vector
NETWORK
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:H/I:H/A:H
CISA SSVC
Vulnrichment
Exploitation
poc
Automatable
no
Technical Impact
total
Details
CWE
CWE-117
CWE-150
CWE-79
Status
published
Products (1)
openwrt/openwrt
< 25.12.5 (2 CPE variants)
Published
Jul 15, 2026
Tracked Since
Jul 15, 2026