CVE-2026-70338: microsoft powershell Code Injection
CVSS: 7.8v3.1HighAnalyzed
Published 11-08-2026Last modified 08-10-2026
Vulnerability summary
CVE-2026-70338 is a high (CVSS 7.8) Code Injection vulnerability in microsoft powershell. EPSS estimates a 0.36% chance of exploitation in the next 30 days, higher than 28.1% of scored vulnerabilities.
CVSS score
7.8/10
010
High · v3.1 (CVE.org)EPSS score
0.36%
0%100%
Low · +0.05 pp in 30 daysKEVNot listedIn no KEV catalog
RansomwareNone recordedNo known use recorded
Public exploits0No public exploits recorded
Timeline
- 11-08-2026PublishedVulnerability first disclosed.
- 08-10-2026Last modifiedVulnerability information updated.
Description
Improper control of generation of code ('code injection') in Microsoft PowerShell allows an unauthorized attacker to bypass a security feature locally.
CVSS metrics
2 scores · 2 sources · 1 versionHigh 7.8Preferred score · CVE.org (CNA)
CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H/E:U/RL:O/RC:CSourcesAll 2 agree
- NVDNIST7.8HighCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
EPSS trend
Probability
0.36%
Chance of exploitation in the next 30 days
Percentile
28%
Versus all other CVEs
30-day change
+0.05 pp
From 0.31% on 19-09-2026
19-09-202619-10-2026
EPSS score0.36%
Known exploited
Compare KEV catalogsNot in any of the 3 tracked catalogs.
Public exploits
0 foundNo public exploits indexed.
Weaknesses
CWE · root causeAffected systems
Microsoft4 products
- powershell≥ 7.4, < 7.4.19.0 | ≥ 7.5, < 7.5.10.0 | ≥ 7.6, < 7.6.5
- powershell 7.4≥ 7.4.0, < 7.4.19.0
- powershell 7.5≥ 7.5.0, < 7.5.10.0
- powershell 7.6≥ 7.6.0, < 7.6.5
1 vendor · 4 products
