CVE-2026-62872: Incorrect authorization in .NET Framework allows an authorized attacker to elevate privileges over a network.

This month

HIGH 8.8WATCHLISTDOWNGRADE

CVE-2026-62872 is a high-severity flaw (CVSS 8.8) affecting .net framework. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

Incorrect authorization in .NET Framework allows an authorized attacker to elevate privileges over a network.

Why this priority

High severity
On your watchlist

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

Risk facts

CVSS score	8.8 (High)
Attack vector	Network (remote)
Attack complexity	Low
Privileges needed	Low
User interaction	None
EPSS exploit chance	0.8% (top 44%)
CISA exploited list	No
Weakness	CWE-863
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 17:18 UTCPublished CVE record published
2026-08-14 14:09 UTCUpdated Record last modified

microsoft .net framework DOWNGRADE

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

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-2026-62872?

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

Is CVE-2026-62872 being exploited?

CVE-2026-62872 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-2026-62872 affect?

CVE-2026-62872 affects .net framework. Severity is high (CVSS 8.8). Incorrect authorization in .NET Framework allows an authorized attacker to elevate privileges over a network.

How urgent is CVE-2026-62872?

Priority 50/100. High severity; On your watchlist

Software pages

.NET vulnerabilities

Related CVEs

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References

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