CVE-2023-45159: 1E Client installer can perform arbitrary file deletion on protected files. A non-privileged user could pro

Routine

HIGH 8.4DOWNGRADE

CVE-2023-45159 is a high-severity flaw (CVSS 8.4) affecting client. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

1E Client installer can perform arbitrary file deletion on protected files. A non-privileged user could provide a symbolic link or Windows junction to point to a protected directory in the installer that the 1E Client would then clear on service startup. A hotfix is available from the 1E support portal that forces the 1E Client to check for a symbolic link or junction and if it finds one refuses to use that path and instead creates a path in

Why this priority

High severity

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

Risk facts

CVSS score	8.4 (High)
Attack vector	Local
Attack complexity	Low
Privileges needed	None
User interaction	None
EPSS exploit chance	0.2% (top 86%)
CISA exploited list	No
Weakness	CWE-59
Published	2023-10-05
Last modified	2026-06-17

Publisher (CNA): 1E Limited · Vendor: 1e

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

Am I affected?

Timeline

2023-10-05 11:15 UTCPublished CVE record published
2026-06-17 06:28 UTCUpdated Record last modified

1e client DOWNGRADE

Affected: 8.1.2.62 · 8.4.1.159 · 9.0.1.88 · 23.7.1.151

Fixed in: no fixed release known

Safe to downgrade to: a release before 8.1.2.62

1. Check installed version

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

2. No fixed release: DOWNGRADE to a release before 8.1.2.62 (Debian / Ubuntu)

apt-cache madison client sudo apt install client=<VERSION_BEFORE_8.1.2.62> sudo apt-mark hold client

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

dnf --showduplicates list client sudo dnf downgrade client-<VERSION_BEFORE_8.1.2.62> sudo dnf versionlock add client

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-2023-45159?

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

Is CVE-2023-45159 being exploited?

CVE-2023-45159 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-2023-45159 affect?

CVE-2023-45159 affects client. Severity is high (CVSS 8.4). 1E Client installer can perform arbitrary file deletion on protected files. A non-privileged user could provide a symbolic link or Windows junction to point to a protected directory in the installer that the 1E Client would then clear on

How urgent is CVE-2023-45159?

Priority 33/100. High severity

Software pages

Windows vulnerabilities

Related CVEs

CVE-2023-45160 HIGH 8.8 DOWNGRADE In the affected version of the 1E Client, an ordinary user could subvert downloaded instruction resource files
CVE-2023-3892 MEDIUM 5.6 DOWNGRADE DOWNGRADE Improper Restriction of XML External Entity Reference vulnerability in MIM Assistant and Client DICOM RTst Loa

References

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