CVE-2023-43870: When installing the Net2 software a root certificate is installed into the trusted store

Routine

HIGH 8.1UPGRADE

CVE-2023-43870 is a high-severity flaw (CVSS 8.1) affecting net2. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

When installing the Net2 software a root certificate is installed into the trusted store. A potential hacker could access the installer batch file or reverse engineer the source code to gain access to the root certificate password. Using the root certificate and password they could then create their own certificates to emulate another site. Then by establishing a proxy service to emulate the site they could monitor traffic passed between the end

Why this priority

High severity

A fixed release or distro patch exists.

Risk facts

CVSS score	8.1 (High)
Attack vector	Network (remote)
Attack complexity	Low
Privileges needed	None
User interaction	Required
EPSS exploit chance	0.4% (top 65%)
CISA exploited list	No
Weakness	CWE-798
Published	2023-12-19
Last modified	2026-06-17

Publisher (CNA): National Cyber Security Centre Netherlands (NCSC-NL) · Vendor: paxton-access

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

Am I affected?

Timeline

2023-12-19 15:15 UTCPublished CVE record published
2026-06-17 06:26 UTCUpdated Record last modified

paxton-access net2 UPGRADE

Affected: >= 6.02 and < 6.07 · 6.07

Fixed in: 6.07

Safe to downgrade to: a release before 6.02

1. Check installed version

apt-cache policy net2 || rpm -q net2 || net2 --version

2. UPGRADE to 6.07 (Debian / Ubuntu)

sudo apt update && sudo apt install --only-upgrade net2

2. UPGRADE (RHEL / Amazon Linux / Fedora)

sudo dnf upgrade net2

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 6.02 (Debian / Ubuntu)

apt-cache madison net2 sudo apt install net2=<VERSION_BEFORE_6.02> sudo apt-mark hold net2

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

dnf --showduplicates list net2 sudo dnf downgrade net2-<VERSION_BEFORE_6.02> sudo dnf versionlock add net2

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-2023-43870?

net2: upgrade to 6.07. Exact commands for each OS are on this page.

Is CVE-2023-43870 being exploited?

CVE-2023-43870 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-2023-43870 affect?

CVE-2023-43870 affects net2. Severity is high (CVSS 8.1). When installing the Net2 software a root certificate is installed into the trusted store. A potential hacker could access the installer batch file or reverse engineer the source code to gain access to the root certificate password. Using th

How urgent is CVE-2023-43870?

Priority 37/100. High severity

Related CVEs

CVE-2020-35919 MEDIUM 5.5 UPGRADE An issue was discovered in the net2 crate before 0.2.36 for Rust

References

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