CVE-2022-40126: A misconfiguration in the Service Mode profile directory of Clash for Windows v0.19.9 allows attackers to esca

Routine

HIGH 7.8DOWNGRADE

CVE-2022-40126 is a high-severity flaw (CVSS 7.8) affecting clash. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

A misconfiguration in the Service Mode profile directory of Clash for Windows v0.19.9 allows attackers to escalate privileges and execute arbitrary commands when Service Mode is activated.

Why this priority

High severity
Public exploit reference

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	Low
User interaction	None
EPSS exploit chance	0.3% (top 75%)
CISA exploited list	No
Weakness	CWE-552
Published	2022-09-29
Last modified	2026-06-17

Publisher (CNA): MITRE · Vendor: clash project

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

Am I affected?

Timeline

2022-09-29 12:15 UTCPublished CVE record published
2026-06-17 05:00 UTCUpdated Record last modified

clash project clash DOWNGRADE

Affected: 0.19.9

Fixed in: no fixed release known

Safe to downgrade to: a release before 0.19.9

1. Check installed version

apt-cache policy clash || rpm -q clash || clash --version

2. No fixed release: DOWNGRADE to a release before 0.19.9 (Debian / Ubuntu)

apt-cache madison clash sudo apt install clash=<VERSION_BEFORE_0.19.9> sudo apt-mark hold clash

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

dnf --showduplicates list clash sudo dnf downgrade clash-<VERSION_BEFORE_0.19.9> sudo dnf versionlock add clash

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-2022-40126?

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

Is CVE-2022-40126 being exploited?

CVE-2022-40126 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-2022-40126 affect?

CVE-2022-40126 affects clash. Severity is high (CVSS 7.8). A misconfiguration in the Service Mode profile directory of Clash for Windows v0.19.9 allows attackers to escalate privileges and execute arbitrary commands when Service Mode is activated.

How urgent is CVE-2022-40126?

Priority 38/100. High severity; Public exploit reference

Software pages

Windows vulnerabilities

Related CVEs

CVE-2024-5732 HIGH 7.3 UPGRADE A vulnerability was found in Clash up to 0.20.1 on Windows
CVE-2023-24205 CRITICAL 9.8 DOWNGRADE Clash for Windows v0.20.12 was discovered to contain a remote code execution (RCE) vulnerability which is expl

References

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