CVE-2022-4956: A vulnerability classified as critical has been found in Caphyon Advanced Installer 19.7

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HIGH 7.8DOWNGRADE

CVE-2022-4956 is a high-severity flaw (CVSS 7.8) affecting advanced installer. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

A vulnerability classified as critical has been found in Caphyon Advanced Installer 19.7. This affects an unknown part of the component WinSxS DLL Handler. The manipulation leads to uncontrolled search path. Attacking locally is a requirement. The exploit has been disclosed to the public and may be used. Upgrading to version 19.7.1 is able to address this issue. It is recommended to upgrade the affected component. The associated identifier of thi

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	0.4% (top 65%)
CISA exploited list	No
Weakness	CWE-427
Published	2023-09-30
Last modified	2026-06-17

Publisher (CNA): VulDB · Vendor: caphyon

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

Am I affected?

Timeline

2023-09-30 17:15 UTCPublished CVE record published
2026-06-17 05:22 UTCUpdated Record last modified

caphyon advanced installer DOWNGRADE

Affected: 19.7

Fixed in: no fixed release known

Safe to downgrade to: a release before 19.7

1. Check installed version

apt-cache policy advanced-installer || rpm -q advanced-installer || advanced-installer --version

2. No fixed release: DOWNGRADE to a release before 19.7 (Debian / Ubuntu)

apt-cache madison advanced-installer sudo apt install advanced-installer=<VERSION_BEFORE_19.7> sudo apt-mark hold advanced-installer

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

dnf --showduplicates list advanced-installer sudo dnf downgrade advanced-installer-<VERSION_BEFORE_19.7> sudo dnf versionlock add advanced-installer

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-2022-4956?

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

Is CVE-2022-4956 being exploited?

CVE-2022-4956 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-2022-4956 affect?

CVE-2022-4956 affects advanced installer. Severity is high (CVSS 7.8). A vulnerability classified as critical has been found in Caphyon Advanced Installer 19.7. This affects an unknown part of the component WinSxS DLL Handler. The manipulation leads to uncontrolled search path. Attacking locally is a requireme

How urgent is CVE-2022-4956?

Priority 41/100. High severity; Public exploit reference

Related CVEs

CVE-2022-27438 HIGH 8.1 UPGRADE DOWNGRADE Caphyon Ltd Advanced Installer 19.3 and earlier and many products that use the updater from Advanced Installer
CVE-2023-25396 HIGH 7.8 UPGRADE Privilege escalation in the MSI repair functionality in Caphyon Advanced Installer 20.0 and below allows attac

References

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