Threat Intelligence / CVE / CVE-2026-48800

CVE-2026-48800

CVSS v3.1 7.8 (HIGH) · EPSS 0.0% (higher than 5.7% of all scored CVEs) · Priority 4.1/10

As of 2026-09-13, CVE-2026-48800 is a HIGH-severity vulnerability, CVSS v3.1 7.8, EPSS 0.0% (5.7th percentile). Threadlinqs Intelligence links 1 tracked threat campaign to CVE-2026-48800, most recently “Notepad++ v8.9.6 — Critical Arbitrary Code Execution via config.xml commandLineInterpreter and shortcuts.xml (CVE-2026-48770, CVE-2026-48778, CVE-2026-48800)”.

Last updated: 2026-09-13

What is CVE-2026-48800?

Notepad++ allows arbitrary code execution via the tag inside UserDefinedCommands in the shortcuts.xml configuration file. The tag text in within shortcuts.xml is read without validation and stored in UserCommand._cmd; when executed via the Run menu it invokes ShellExecute with the attacker-controlled string as the executable path, enabling arbitrary code execution in the context of the current user. It affects all Notepad++ versions up to and including v8.9.6 and is fixed in v8.9.6.1.

The record classifies CVE-2026-48800 under weakness class CWE-78. Its CVSS v3 base vector states that the flaw requires local access to the host, needs no prior authentication, needs a user to take an action first, and has high impact on confidentiality, integrity, availability.

Severity and exploitation probability

CVSS v3.1 base score
7.8 — HIGH
CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H
EPSS (FIRST)
0.0% probability of exploitation in the next 30 days, higher than 5.7% of all scored CVEs
CISA KEV
Not listed in the CISA Known Exploited Vulnerabilities catalog
Threadlinqs priority
4.1/10 — a Threadlinqs composite of the CVSS base score, the EPSS percentile and public exploit availability

Is CVE-2026-48800 being exploited?

It currently carries a trending score of 6 in the Threadlinqs vulnerability feed.

Affected products and versions

No affected-product or package list has been recorded for CVE-2026-48800 in the tracked sources. The vendor advisory and the references below are the authoritative statement of what is affected.

How to fix CVE-2026-48800

No vendor patch reference has been recorded for CVE-2026-48800 in the tracked sources. Follow the references below for a fix, and treat any affected deployment as exposed until the vendor states otherwise.

Threat activity tracking CVE-2026-48800

1 tracked threat in the Threadlinqs corpus references CVE-2026-48800, either in the campaign’s CVE list or as an indicator on the campaign record.

Sources

Seeded from research_verified and not yet processed by the Threadlinqs enrichment pipeline, so blank CVSS, EPSS or KEV fields above mean NOT MEASURED rather than measured-absent.

Full detection coverage & IOCs for threats exploiting CVE-2026-48800 are available via the Threadlinqs MCP server (Purple tier). View plans →

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