CVE-2026-26143Disclosure(microsoft / powershell)

LOWCVSS 7.8 · HIGH

Signal is active with 1 mentions in latest observed window

Immediate actions

Patch microsoft powershell systems immediately

Recommended action window: Monitor and triage in normal cycle

NVD description

Improper input validation in Microsoft PowerShell allows an unauthorized attacker to bypass a security feature locally.

microsoft CVEs Back to dashboard

0.5/ 10 priority

Sources & remediation

Vendor / third-party advisories

https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-26143

Weakness type (CWE)

CWE-20

Priority

LOW

Exploitation

NONE

PoC

NONE

Patch

AVAILABLE

Momentum

STABLE

Are you affected?

If you run products in this scope, you should treat this CVE as relevant to your environment.

powershell

Threat summary

Patch or workaround signal is available
4 mentions across 3 observed days
Momentum state: stable

What's happening

Patch or workaround mentioned in 1 signal
Technical details provided in 3 signals
Disclosure: 2 classified signals
General: 1 classified signal
Peaked 1d ago at 2 mentions (2026-04-15); latest day: 1
4 total mentions across 3 days

Affected systems

Vendors

microsoft

Products

powershell

Deep dive

Activity timeline4 mentions / 3d

Signal classification3 categories

Disclosure

250.0%

Patch

125.0%

General

125.0%

Referenced assets5 URLs

By indicator

Classification over time

Date	Total	Labels

2026-04-14	1	Patch1
2026-04-15	2	Disclosure1General1
2026-04-16	1	Disclosure1

Full discourse4 posts

_Emin_@p0w3rsh3ll179d
Patch
CVE-2026-26143 Microsoft PowerShell Security Feature Bypass Vulnerability > https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-26143 CVE-2026-26170 PowerShell Elevation of Privilege Vulnerability > https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-26170 #PowerShell
Post summary
The text lists two PowerShell CVEs and provides links to Microsoft’s security update guides, indicating that vendor patches are available.
0001093
1.2K followersView on X
0day Signal@0dayPublishing178d
Disclosure
⚠️ CVE-2026-26143: Micr... PowerShell's input validation bypass hits 7.8 CVSS with local RCE potential - perfect for persistence once you're already in #PowerShell #PrivEsc. https://zerodaysignal.com/vulnerability/CVE-2026-26143 #netsec #vulnerability #CVE #sysadmin #zeroday
Post summary
The post discloses a PowerShell input validation bypass with a CVSS score of 7.8 and local RCE potential, but it does not mention any PoC, exploit code, patch, or active exploitation.
0000044
218 followersView on X
Infoflowcloud@infoflowcloud179d
Disclosure
🚨*CVE* CVE-2026-26143 Improper input validation in Microsoft PowerShell allows an unauthorized attacker to bypass a security feature locally. https://www.cve.org/CVERecord?id=CVE-2026-26143 ----- Traducción: CVE-2026-26143 Validación de entrada inapropiada en Microsoft Power… http://infoflow.cloud`
Post summary
The post announces CVE-2026-26143, describing improper input validation in PowerShell that allows local attackers to bypass a security feature, but provides no PoC, exploit, exploitation evidence, or patch information.
0000032
71 followersView on X
CVE@CVEnew179d
General
CVE-2026-26143 Improper input validation in Microsoft PowerShell allows an unauthorized attacker to bypass a security feature locally. https://www.cve.org/CVERecord?id=CVE-2026-26143
Post summary
The post provides a brief CVE description without any detailed technical information, proof‑of‑concept, exploitation evidence, or patch notes.
00000190
57.2K followersView on X

CPE platform detail1 entries

Part:

Vendor:

Product:

Version:

Target SW:

Target HW:

1 of 1 entries

Part	Vendor	Product	Version	Target SW	Target HW
App	microsoft	powershell	-	-	-

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What researchers are saying

CVE-2026-26143

_Emin_@p0w3rsh3llPatch

The text lists two PowerShell CVEs and provides links to Microsoft’s security update guides, indicating that vendor patches are available.

0day Signal@0dayPublishingDisclosure

The post discloses a PowerShell input validation bypass with a CVSS score of 7.8 and local RCE potential, but it does not mention any PoC, exploit code, patch, or active exploitation.

Infoflowcloud@infoflowcloudDisclosure

The post announces CVE-2026-26143, describing improper input validation in PowerShell that allows local attackers to bypass a security feature, but provides no PoC, exploit, exploitation evidence, or patch information.

CVE@CVEnewGeneral

The post provides a brief CVE description without any detailed technical information, proof‑of‑concept, exploitation evidence, or patch notes.