CVE-2025-33053: Microsoft Windows

Should you act?

Exploited: patch now if you run it

CISA has confirmed exploitation in the wild. This signal is computed from CISA KEV, EPSS and CVSS data; it is not an editorial verdict.

Yes, if you run Microsoft Windows. CISA added this CVE to its Known Exploited Vulnerabilities catalog on 2025-06-10, which means there is reliable evidence of exploitation in the wild. US federal agencies must remediate by 2025-07-01; treat that as the outer limit, not the target.
EPSS 87.0%, percentile 99.8: FIRST’s model estimates a 87.0% chance of exploitation activity in the next 30 days, higher than 99.8% of all scored CVEs (very high). EPSS is a probability, not a verdict.
Needs a user to click or open something. Phishing makes that realistic, but it is not wormable.

What it is

External control of file name or path in Internet Shortcut Files allows an unauthorized attacker to execute code over a network.

CISA’s summary

Microsoft Windows contains an external control of file name or path vulnerability that could allow an attacker to execute code from a remote WebDAV location specified by the WorkingDirectory attribute of Internet Shortcut files.

Weakness type: CWE-73.

Product: Microsoft Windows · Assigned by: microsoft · Published: 2025-06-10

Affected and fixed versions

Vendor	Product	Affected versions (per CVE record)
Microsoft	Windows 10 Version 1507	10.0.10240.0 < 10.0.10240.21034
Microsoft	Windows 10 Version 1607	10.0.14393.0 < 10.0.14393.8148
Microsoft	Windows 10 Version 1809	10.0.17763.0 < 10.0.17763.7434
Microsoft	Windows 10 Version 21H2	10.0.19044.0 < 10.0.19044.5965
Microsoft	Windows 10 Version 22H2	10.0.19045.0 < 10.0.19045.5965
Microsoft	Windows 11 version 22H2	10.0.22621.0 < 10.0.22621.5472
Microsoft	Windows 11 version 22H3	10.0.22631.0 < 10.0.22631.5472
Microsoft	Windows 11 Version 23H2	10.0.22631.0 < 10.0.22631.5472
Microsoft	Windows 11 Version 24H2	10.0.26100.0 < 10.0.26100.4349
Microsoft	Windows Server 2008 R2 Service Pack 1	6.1.7601.0 < 6.1.7601.27769

Severity scores

Scored by	CVSS	Score	Vector
microsoft	3.1	8.8 High	`CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H/E:F/RL:O/RC:C`

Attack vector: network (remotely reachable)
Attack complexity: low
Privileges required: none (no login)
User interaction: required (a user must click/open something)
Scope: unchanged

CVSS measures how bad a flaw is if exploited, not how likely exploitation is. Read it next to the exploitation data below.

Exploitation and urgency

CISA KEV: added 2025-06-10; federal due date 2025-07-01. Known ransomware use: Unknown.
CISA required action: Apply mitigations per vendor instructions, follow applicable BOD 22-01 guidance for cloud services, or discontinue use of the product if mitigations are unavailable.
CISA SSVC assessment: exploitation active, automatable no, technical impact total.
FIRST EPSS (model of 2026-10-21): 87.02% probability of exploitation activity in the next 30 days; percentile 99.8.

Timeline

2025-06-10 — Added to CISA’s Known Exploited Vulnerabilities catalog
2025-06-10 — CVE record published by microsoft
2025-07-01 — CISA remediation deadline for US federal agencies
2026-02-26 — CVE record last updated

Sources and references

Original sources first. Version and fix details should always be confirmed against the vendor or project advisory.

Other references from the CVE record and advisory

research.checkpoint.com research.checkpoint.com
darkreading.com darkreading.com
therecord.media therecord.media
bleepingcomputer.com bleepingcomputer.com
theregister.com theregister.com
vicarius.io vicarius.io
vicarius.io vicarius.io

All exploited Microsoft vulnerabilities · Today’s Security Digest