What is CVE-2023-28509?

CVE-2023-28509 is a high-severity vulnerability in Linux Kernel, classified under Use of a Broken or Risky Cryptographic Algorithm. CVSS score: 7.5/10. Published 2023-03-29.

How severe is CVE-2023-28509?

High severity. CVSS v3 base score is 7.5 out of 10.

Vulnerability in Linux Kernel

CVE-2023-28509

Rocket Software UniData versions prior to 8.2.4 build 3003 and UniVerse versions prior to 11.3.5 build 1001 or 12.2.1 build 2002 use weak encryption for packet-level security and passwords transferred on the wire.

Vulnerability class: POODLE (CVE-2014-3566)

Published 2023-03-29 · last modified 2026-06-17.

CVSS v3 metric

CVSS v3 base score 7.5 (High). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N.

EPSS exploit prediction

EPSS: 0.003 (18.5th percentile), scored 2026-09-30.

Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 18th percentile — 18.5% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS over last 30 days · oldest: 0.003 · newest: 0.003 · change: 0.000

Affected products

Weakness classification (CWE)

CWE-327 — Use of a Broken or Risky Cryptographic Algorithm

References

www.rapid7.com/blog/post/2023/03/29/multiple-vulnerabilities-in-rocket-software… (Third Party Advisory, third-party-advisory)

Frequently asked questions

What is CVE-2023-28509?: CVE-2023-28509 is a high-severity vulnerability in Linux Kernel, classified under Use of a Broken or Risky Cryptographic Algorithm. CVSS score: 7.5/10. Published 2023-03-29.
How severe is CVE-2023-28509?: High severity. CVSS v3 base score is 7.5 out of 10.