Threat Intelligence / CVE / CVE-2026-68820

CVE-2026-68820 — Microsoft Windows 10 Version 1607

CISA KEV
CVSS v3.1 7 (HIGH) · EPSS 0.3% (higher than 26.1% of all scored CVEs) · Priority 9/10 · Published 2026-08-11

As of 2026-08-16, CVE-2026-68820 is a HIGH-severity vulnerability in Microsoft Windows 10 Version 1607, CVSS v3.1 7, EPSS 0.3% (26.1th percentile). It is listed in the CISA Known Exploited Vulnerabilities catalog (added 2026-08-11), with a US federal remediation deadline of 2026-08-25. Threadlinqs Intelligence links 2 tracked threat campaigns to CVE-2026-68820, most recently “Lazarus Exploits CVE-2026-68820 Zero-Day via Malicious PDF Viewer in Operation Dream Job Against Defense Industry”.

Last updated: 2026-08-16

What is CVE-2026-68820?

Use after free in Windows Ancillary Function Driver for WinSock allows an authorized attacker to elevate privileges locally.

The record classifies CVE-2026-68820 under weakness class CWE-416. Its CVSS v3 base vector states that the flaw requires local access to the host, needs low-privilege credentials, needs no user interaction, and has high impact on confidentiality, integrity, availability. 12 affected-product entries are recorded, across 1 vendor, listed below. The identifier was first published 42 days ago.

Severity and exploitation probability

CVSS v3.1 base score
7 — HIGH
CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H/E:U/RL:O/RC:C
EPSS (FIRST)
0.3% probability of exploitation in the next 30 days, higher than 26.1% of all scored CVEs
CISA KEV
Listed since 2026-08-11, federal remediation deadline 2026-08-25
Threadlinqs priority
9/10 — CISA KEV-listed, which Threadlinqs floors at 9
Published
2026-08-11, last modified 2026-08-16

Is CVE-2026-68820 being exploited?

CISA added CVE-2026-68820 to the Known Exploited Vulnerabilities catalog on 2026-08-11, which means the agency holds evidence of exploitation in the wild; US federal civilian agencies had to remediate it by 2026-08-25 under BOD 22-01. Weaponised exploit code for CVE-2026-68820 is publicly available. 2 public proof-of-concept repositories are tracked for this identifier. It currently carries a trending score of 53 in the Threadlinqs vulnerability feed.

Affected products and versions

How to fix CVE-2026-68820

The record marks a vendor fix as available for CVE-2026-68820. Patch reference: https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-68820. Vendor advisory: https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-68820. Because CVE-2026-68820 is KEV-listed, US federal civilian agencies were required to apply the vendor fix, or stop using the product, by 2026-08-25. 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-2026-68820

2 tracked threats in the Threadlinqs corpus reference CVE-2026-68820, either in the campaign’s CVE list or as an indicator on the campaign record.

Sources

Enriched from CVE.org, NVD, FIRST EPSS, CISA KEV, GitHub Security Advisories, public proof-of-concept repositories. Last verified by Threadlinqs on . This product uses the NVD API but is not endorsed or certified by the NVD.

Vendor advisory and patch

Full detection coverage & IOCs for threats exploiting CVE-2026-68820 are available via the Threadlinqs MCP server (Purple tier). View plans →

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