CVE-2025-26682: Allocation of resources without limits or throttling in ASP.NET Core allows an unauthorized attacker to deny s

This month

HIGH 7.5REMOTEWATCHLISTUPGRADEUPGRADE

CVE-2025-26682 is a high-severity flaw (CVSS 7.5) affecting asp.net core, visual studio 2022. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

Allocation of resources without limits or throttling in ASP.NET Core allows an unauthorized attacker to deny service over a network.

Why this priority

High severity
Remotely exploitable, no login, no user action
On your watchlist

A fixed release or distro patch exists.

Risk facts

CVSS score	7.5 (High)
Attack vector	Network (remote)
Attack complexity	Low
Privileges needed	None
User interaction	None
EPSS exploit chance	1.7% (top 23%)
CISA exploited list	No
Weakness	CWE-770
Published	2025-04-08
Last modified	2026-06-17

Publisher (CNA): Microsoft Corporation · Vendor: microsoft

Last updated 2026-06-17 · Sources: CVE Program, NVD, CISA KEV, EPSS and vendor advisories · How we score

Am I affected?

Timeline

2025-04-08 18:15 UTCPublished CVE record published
2026-06-17 09:02 UTCUpdated Record last modified

microsoft asp.net core UPGRADE

Affected: >= 8.0.0 and < 8.0.15 · >= 9.0.0 and < 9.0.4

Fixed in: 8.0.15, 9.0.4

Safe to downgrade to: a release before 8.0.0

1. Check installed version

apt-cache policy asp.net-core || rpm -q asp.net-core || asp.net-core --version

2. UPGRADE to 8.0.15 (Debian / Ubuntu)

sudo apt update && sudo apt install --only-upgrade asp.net-core

2. UPGRADE (RHEL / Amazon Linux / Fedora)

sudo dnf upgrade asp.net-core

Note

Distros often backport fixes without changing the version number. Confirm with the distro advisory or changelog.

3. If no update is available yet, DOWNGRADE to a release before 8.0.0 (Debian / Ubuntu)

apt-cache madison asp.net-core sudo apt install asp.net-core=<VERSION_BEFORE_8.0.0> sudo apt-mark hold asp.net-core

3. If no update is available yet, DOWNGRADE (RHEL / Amazon Linux / Fedora)

dnf --showduplicates list asp.net-core sudo dnf downgrade asp.net-core-<VERSION_BEFORE_8.0.0> sudo dnf versionlock add asp.net-core

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.

microsoft visual studio 2022 UPGRADE

Affected: >= 17.8.0 and < 17.8.20 · >= 17.10.0 and < 17.10.13 · >= 17.12.0 and < 17.12.7 · >= 17.13.0 and < 17.13.6

Fixed in: 17.8.20, 17.10.13, 17.12.7, 17.13.6

Safe to downgrade to: a release before 17.8.0

1. Check installed version

apt-cache policy visual-studio-2022 || rpm -q visual-studio-2022 || visual-studio-2022 --version

2. UPGRADE to 17.8.20 (Debian / Ubuntu)

sudo apt update && sudo apt install --only-upgrade visual-studio-2022

2. UPGRADE (RHEL / Amazon Linux / Fedora)

sudo dnf upgrade visual-studio-2022

Note

Distros often backport fixes without changing the version number. Confirm with the distro advisory or changelog.

3. If no update is available yet, DOWNGRADE to a release before 17.8.0 (Debian / Ubuntu)

apt-cache madison visual-studio-2022 sudo apt install visual-studio-2022=<VERSION_BEFORE_17.8.0> sudo apt-mark hold visual-studio-2022

3. If no update is available yet, DOWNGRADE (RHEL / Amazon Linux / Fedora)

dnf --showduplicates list visual-studio-2022 sudo dnf downgrade visual-studio-2022-<VERSION_BEFORE_17.8.0> sudo dnf versionlock add visual-studio-2022

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-2025-26682?

asp.net core: upgrade to 8.0.15, 9.0.4; visual studio 2022: upgrade to 17.8.20, 17.10.13, 17.12.7, 17.13.6. Exact commands for each OS are on this page.

Is CVE-2025-26682 being exploited?

CVE-2025-26682 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-2025-26682 affect?

CVE-2025-26682 affects asp.net core, visual studio 2022. Severity is high (CVSS 7.5). Allocation of resources without limits or throttling in ASP.NET Core allows an unauthorized attacker to deny service over a network.

How urgent is CVE-2025-26682?

Priority 56/100. High severity; Remotely exploitable, no login, no user action; On your watchlist

Software pages

.NET vulnerabilities · Visual Studio vulnerabilities

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References

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