CVE-2026-69805
published 2026-09-08CVE-2026-69805: External control of file name or path in .NET allows an unauthorized attacker to elevate privileges over a network.
PriorityP353high8.1CVSS 3.1
AVNACHPRNUINSUCHIHAH
EPSS
0.50%
41.7th percentile
External control of file name or path in .NET allows an unauthorized attacker to elevate privileges over a network.
Affected
6 ranges
| Vendor | Product | Version range | Fixed in |
|---|---|---|---|
| microsoft | microsoft.diagnostics.runtime | < 4.1.740301 | 4.1.740301 |
| microsoft | microsoft.diagnostics.runtime | >= 4.1.740301 < 4.1.740301 | 4.1.740301 |
| microsoft | microsoft_visual_studio_2022_version_17.14 | >= 17.14.0 < 17.14.40 | 17.14.40 |
| microsoft | microsoft_visual_studio_2026_version_18.9 | >= 18.9.0 < 18.9.3 | 18.9.3 |
| microsoft | visual_studio_2022 | >= 17.14.0 < 17.14.40 | 17.14.40 |
| microsoft | visual_studio_2026 | >= 18.9.0 < 18.9.3 | 18.9.3 |
CVSS provenance
nvdv3.18.1HIGHCVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H
vendor_redhat8.1HIGH
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Red Hat
dotnet: .NET: Elevation of Privilege via external control of file name or path
vendor_redhat·2026-09-08·CVSS 8.1
CVE-2026-69805 [HIGH] CWE-73 dotnet: .NET: Elevation of Privilege via external control of file name or path
dotnet: .NET: Elevation of Privilege via external control of file name or path
External control of file name or path in .NET allows an unauthorized attacker to elevate privileges over a network.
A flaw was found in .NET. An unauthorized attacker can exploit this vulnerability by gaining external control of a file name or path, which allows them to elevate privileges over a network.
Package: dotnet10.0 (Red Hat Hardened Images) - Not affected
Package: dotnet8.0 (Red Hat Hardened Images) - Not affected
Package: dotnet9.0 (Red Hat Hardened Images) - Not affected
GHSA
External control of file name or path in .NET allows an unauthorized attacker to elevate privileges over a network.
ghsa_unreviewed·2026-09-08
CVE-2026-69805 [HIGH] CWE-73 External control of file name or path in .NET allows an unauthorized attacker to elevate privileges over a network.
External control of file name or path in .NET allows an unauthorized attacker to elevate privileges over a network.
No detection rules found.
No public exploits indexed.
Sans Isc
September 2026 Microsoft Patch Tuesday, (Tue, Sep 8th)
blogs_sans_isc·2026-09-08·CVSS 7.8
CVE-2026-81963 [HIGH] September 2026 Microsoft Patch Tuesday, (Tue, Sep 8th)
September 2026 Microsoft Patch Tuesday
Published: 2026-09-08. Last Updated: 2026-09-08 19:20:30 UTC
by Johannes Ullrich (Version: 1)
0 comment(s)
This month, Microsoft released patches for a record-breaking 973 vulnerabilities, including 113 rated critical. It is by far the largest Patch Tuesday to date, well ahead of the previous high of 664 set in July 2026. Two vulnerabilities are listed as exploited in the wild, while none were publicly disclosed before Patch Tuesday. Notable fixes include Windows privilege escalation and critical RCEs in Skype for Business, MSMQ and RRAS.
A few vulnerabilities worth mentioning:
Windows Update Stack Elevation of Privilege Vulnerability (CVE-2026-81963)
Microsoft reports that CVE-2026-81963 is being exploited, though it was not publicly disclosed b
Rapid7
Patch Tuesday - September 2026
blogs_rapid7·2026-09-08·CVSS 7.8
CVE-2026-85880 [HIGH] Patch Tuesday - September 2026
Microsoft is publishing 974 own-product vulnerabilities on September 2026 Patch Tuesday , including 723 vulnerabilities in Windows. Along with Microsoft fixes for 25 non-Microsoft CVEs, that brings the total number of vulnerabilities on the table today to 999. Whether this is the biggest Patch Tuesday ever depends on how we count, but this is by far the most CVEs that Microsoft has ever published in a single day. As Rapid7 noted last month, there is no reason to suppose that Patch Tuesday will ever return to the lower volumes we saw prior to 2026. Microsoft is aware of exploitation in the wild for two of the vulnerabilities published today.
## Windows ALPC: zero-day EoP
The eternal game of elevation of privilege whack-a-mole between Microsoft and attackers continues. This month, the batt
Bugzilla
CVE-2026-69805 dotnet: .NET: Elevation of Privilege via external control of file name or path
bugzilla·2026-09-08·CVSS 8.1
CVE-2026-69805 [HIGH] CVE-2026-69805 dotnet: .NET: Elevation of Privilege via external control of file name or path
CVE-2026-69805 dotnet: .NET: Elevation of Privilege via external control of file name or path
External control of file name or path in .NET allows an unauthorized attacker to elevate privileges over a network.
2026-09-08
Published