CVE-2023-0887: A vulnerability was found in phjounin TFTPD64-SE 4.64 and classified as critical

Routine

HIGH 7.0DOWNGRADE

CVE-2023-0887 is a high-severity flaw (CVSS 7.0) affecting tftpd64. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

A vulnerability was found in phjounin TFTPD64-SE 4.64 and classified as critical. This issue affects some unknown processing of the file tftpd64_svc.exe. The manipulation leads to unquoted search path. An attack has to be approached locally. The complexity of an attack is rather high. The exploitation is known to be difficult. The associated identifier of this vulnerability is VDB-221351.

Why this priority

High severity

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

Risk facts

CVSS score	7.0 (High)
Attack vector	Local
Attack complexity	High
Privileges needed	Low
User interaction	None
EPSS exploit chance	0.2% (top 91%)
CISA exploited list	No
Weakness	CWE-428
Published	2023-02-17
Last modified	2026-06-17

Publisher (CNA): VulDB · Vendor: tftpd64 project

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

Am I affected?

Timeline

2023-02-17 09:15 UTCPublished CVE record published
2026-06-17 05:26 UTCUpdated Record last modified

tftpd64 project tftpd64 DOWNGRADE

Affected: 4.64

Fixed in: no fixed release known

Safe to downgrade to: a release before 4.64

1. Check installed version

apt-cache policy tftpd64 || rpm -q tftpd64 || tftpd64 --version

2. No fixed release: DOWNGRADE to a release before 4.64 (Debian / Ubuntu)

apt-cache madison tftpd64 sudo apt install tftpd64=<VERSION_BEFORE_4.64> sudo apt-mark hold tftpd64

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

dnf --showduplicates list tftpd64 sudo dnf downgrade tftpd64-<VERSION_BEFORE_4.64> sudo dnf versionlock add tftpd64

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-2023-0887?

tftpd64: downgrade or apply the listed mitigation. Exact commands for each OS are on this page.

Is CVE-2023-0887 being exploited?

CVE-2023-0887 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-2023-0887 affect?

CVE-2023-0887 affects tftpd64. Severity is high (CVSS 7.0). A vulnerability was found in phjounin TFTPD64-SE 4.64 and classified as critical. This issue affects some unknown processing of the file tftpd64_svc.exe. The manipulation leads to unquoted search path. An attack has to be approached locally

How urgent is CVE-2023-0887?

Priority 27/100. High severity

References

← Back to latest CVEs