CVE-2026-65810: Relative path traversal in .NET Framework allows an unauthorized attacker to elevate privileges locally.

This month

HIGH 7.8WATCHLISTDOWNGRADE

CVE-2026-65810 is a high-severity flaw (CVSS 7.8) affecting .net framework. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

Relative path traversal in .NET Framework allows an unauthorized attacker to elevate privileges locally.

Why this priority

High severity
On your watchlist

No fix is published yet: follow the downgrade or mitigation steps.

Risk facts

CVSS score	7.8 (High)
Attack vector	Local
Attack complexity	Low
Privileges needed	None
User interaction	Required
EPSS exploit chance	0.4% (top 66%)
CISA exploited list	No
Weakness	CWE-23
Published	2026-08-11
Last modified	2026-08-14

Publisher (CNA): Microsoft Corporation · Vendor: microsoft

Last updated 2026-08-14 · Sources: CVE Program, NVD, CISA KEV, EPSS and vendor advisories · How we score

Am I affected?

Timeline

2026-08-11 17:19 UTCPublished CVE record published
2026-08-14 13:30 UTCUpdated Record last modified

microsoft .net framework DOWNGRADE

Affected: 3.5 · 4.6.2 · 4.7 · 4.7.1 · 4.7.2 · 4.8 · 4.8.1

Fixed in: no fixed release known

Safe to downgrade to: a release before 3.5

1. Check installed version

apt-cache policy .net-framework || rpm -q .net-framework || .net-framework --version

2. No fixed release: DOWNGRADE to a release before 3.5 (Debian / Ubuntu)

apt-cache madison .net-framework sudo apt install .net-framework=<VERSION_BEFORE_3.5> sudo apt-mark hold .net-framework

2. No fixed release: DOWNGRADE (RHEL / Amazon Linux / Fedora)

dnf --showduplicates list .net-framework sudo dnf downgrade .net-framework-<VERSION_BEFORE_3.5> sudo dnf versionlock add .net-framework

Downgrade risk

Downgrading can break dependent software and may reopen older bugs. Read the distro advisory first and test on a non-production host.

After downgrade

Restart the service, and keep the package held until a fixed release ships.

Verify at the official source NVD · CVE Program · Report a problem with this page
Scores and fixes here are computed automatically from those and other public sources. Confirm with the vendor advisory before changing production systems.

Quick answers

How do I fix CVE-2026-65810?

.net framework: downgrade or apply the listed mitigation. Exact commands for each OS are on this page.

Is CVE-2026-65810 being exploited?

CVE-2026-65810 is not on the CISA Known Exploited Vulnerabilities list at the time of the last update. Check again, as this can change.

What does CVE-2026-65810 affect?

CVE-2026-65810 affects .net framework. Severity is high (CVSS 7.8). Relative path traversal in .NET Framework allows an unauthorized attacker to elevate privileges locally.

How urgent is CVE-2026-65810?

Priority 41/100. High severity; On your watchlist

Software pages

.NET vulnerabilities

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References

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