CVE-2026-18811

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

2.26% probability of exploitation activity in the next 30 days.

EPSS percentile

Ranks above 81.4% of scored records. A rank, not a probability.

NVD base score

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

NVD CVSS vector

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

Deferred. NVD last modified this record on 2026-08-12.

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

2026-08-04 20:15Z1 MO AGO

Last updated

2026-08-05 14:58Z1 MO AGO

Reserved

2026-08-04

Assigning CNA

VulDB

Record state

PUBLISHED

Severity

High (CVSS 8.6)

CNA CVSS vector

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

Weaknesses

• CWE-74Improper Neutralization of Special Elements in Output Used by a Downstream Component ('Injection')Class
• CWE-77Improper Neutralization of Special Elements used in a Command ('Command Injection')Class

Data version

5.2

Document digest

ce4749b5657d677e69922f4cb22083b0f27b9103e69c8844852017bb96554e19

• vuldb.comVDB-385810 | H3C NX15 esps add command injectionhttps://vuldb.com/vuln/385810vdb-entrytechnical-description
• vuldb.comVDB-385810 | CTI Indicators (IOB, IOC, TTP, IOA)https://vuldb.com/vuln/385810/ctisignaturepermissions-required
• vuldb.comCVE-2026-18811 | CVE Analysis and Reporthttps://vuldb.com/cve/CVE-2026-18811third-party-advisory
• vuldb.comSubmit #857807 | H3C NX15 Router NX15V100R017 Command Injectionhttps://vuldb.com/submit/857807third-party-advisory
• github.comhttps://github.com/coconut652-7/IOT_Vul_Public/tree/main/H3C/NX15R017/esps_filter_url_add_root_rceexploit