CVE-2026-61876

Exploitation

Public exploit code exists. CISA's assessment records a public proof of concept. That is not a report of exploitation in the wild.

SSVC decision

• ExploitationpocPublic proof-of-concept exploit code exists. Not a report of exploitation in the wild.
• AutomatablenoAt least one step from reconnaissance to exploitation cannot be reliably automated.
• Technical ImpacttotalSuccessful exploitation gives total control of the vulnerable component.

CISA publishes the decision points, not a final SSVC decision. The decision also depends on mission and well-being impact, which is a property of your deployment rather than of the vulnerability.

EPSS probability

1.62% probability of exploitation activity in the next 30 days.

EPSS percentile

Equal to or higher than the score of 75.9% of scored records. A rank, not a probability.

NVD base score

9.4 (CVSS v4.0), scored by the NVD independently of the CNA.

NVD CVSS vector

CVSS:4.0/AV:A/AC:L/AT:N/PR:N/UI:P/VC:H/VI:H/VA:H/SC:H/SI:H/SA:H/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X

NVD analysis status

Awaiting Analysis. NVD last modified this record on 2026-10-24.

Red Hat severity

No Red Hat rating. Red Hat rates the CVEs that affect its products.

Exploit-prediction scores from FIRST. Independent scoring and analysis status from the NVD. Vendor severity from Red Hat. Exploitation assessment and catalog membership from CISA.

Published

2026-07-12 12:07Z3 MO AGO

Last updated

2026-07-14 22:03Z3 MO AGO

Reserved

2026-07-10

Assigning CNA

VulnCheck

Record state

PUBLISHED

Severity

Critical (CVSS 9.4)

CNA CVSS vector

CVSS:4.0/AV:A/AC:L/AT:N/PR:N/UI:P/VC:H/VI:H/VA:H/SC:H/SI:H/SA:H

Weaknesses

• CWE-79Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')Base

Data version

5.2

Document digest

a32abf1c128037c7958beb4204f844a8ff80519cb6a1de9646e5bc79c1087859

• github.comGitHub Security Advisory (GHSA-686p-p8p9-x6fh)https://github.com/openwrt/luci/security/advisories/GHSA-686p-p8p9-x6fhvendor-advisory
• www.vulncheck.comVulnCheck Advisory: LuCI DHCPv6 Lease Hostname Stored Cross-Site Scriptinghttps://www.vulncheck.com/advisories/luci-dhcpv6-lease-hostname-stored-cross-site-scriptingthird-party-advisory