Threat Intelligence / CVE / CVE-2026-26127

CVE-2026-26127 — Microsoft .net

CVSS v3.1 7.5 (HIGH) · EPSS 0.1% (higher than 30.1% of all scored CVEs) · Priority 5/10 · Published 2026-03-10

As of 2026-04-01, CVE-2026-26127 is a HIGH-severity vulnerability in Microsoft .net, CVSS v3.1 7.5, EPSS 0.1% (30.1th percentile). Threadlinqs Intelligence links 1 tracked threat campaign to CVE-2026-26127, most recently “Microsoft Office RCE via Preview Pane (CVE-2026-26110, CVE-2026-26113) — March 2026 Patch Tuesday”.

Last updated: 2026-04-01

What is CVE-2026-26127?

Out-of-bounds read in .NET allows an unauthorized attacker to deny service over a network.

The record classifies CVE-2026-26127 under weakness class CWE-125. Its CVSS v3 base vector states that the flaw is reachable remotely over the network, needs no prior authentication, needs no user interaction, and has high impact on availability. 5 affected-product entries are recorded, across 3 vendors, listed below. The identifier was first published 187 days ago.

Severity and exploitation probability

CVSS v3.1 base score
7.5 — HIGH
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
EPSS (FIRST)
0.1% probability of exploitation in the next 30 days, higher than 30.1% of all scored CVEs
CISA KEV
Not listed in the CISA Known Exploited Vulnerabilities catalog
Threadlinqs priority
5/10 — a Threadlinqs composite of the CVSS base score, the EPSS percentile and public exploit availability
Published
2026-03-10, last modified 2026-04-01

Is CVE-2026-26127 being exploited?

It currently carries a trending score of 13 in the Threadlinqs vulnerability feed.

Affected products and versions

How to fix CVE-2026-26127

The record marks a vendor fix as available for CVE-2026-26127. Patch reference: https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-26127. Vendor advisory: https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-26127. Apply the vendor fix referenced above to every affected product listed in this record, then confirm the running version against the vendor advisory.

Threat activity tracking CVE-2026-26127

1 tracked threat in the Threadlinqs corpus references CVE-2026-26127, either in the campaign’s CVE list or as an indicator on the campaign record.

Sources

Seeded from research 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-2026-26127 are available via the Threadlinqs MCP server (Purple tier). View plans →

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