What is CVE-2020-13398?

CVE-2020-13398 is a high-severity vulnerability in Freerdp, classified under Out-of-bounds Write. CVSS score: 8.3/10. Published 2020-05-22.

How severe is CVE-2020-13398?

High severity. CVSS v3 base score is 8.3 out of 10.

Is CVE-2020-13398 known to be exploited?

2 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.

Buffer overflow in Freerdp

CVE-2020-13398

An issue was discovered in FreeRDP before 2.1.1. An out-of-bounds (OOB) write vulnerability has been detected in crypto_rsa_common in libfreerdp/crypto/crypto.c.

Vulnerability class: Buffer Overflow

Published 2020-05-22 · last modified 2026-06-17.

CVSS v3 metric

CVSS v3 base score 8.3 (High). Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:L.

EPSS exploit prediction

EPSS: 0.023 (82.8th percentile), scored 2026-09-29.

Low probability of exploitation in the next 30 days, but still tracked. 83rd percentile — 82.8% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS over last 30 days · oldest: 0.023 · newest: 0.023 · change: 0.000

Affected products

Freerdp
Canonical Ubuntu Linux — versions 16.04, 18.04, 19.10
Debian Linux — versions 9.0, 10.0
openSUSE Leap — versions 15.1

Weakness classification (CWE)

CWE-787 — Out-of-bounds Write

Public proof-of-concept exploits

References

github.com/FreeRDP/FreeRDP/compare/2.1.0...2.1.1 (Third Party Advisory, Release Notes)
github.com/FreeRDP/FreeRDP/commit/8fb6336a4072abcee8ce5bd6ae91104628c7bb69 (Third Party Advisory)
github.com/FreeRDP/FreeRDP/commit/8305349a943c68b1bc8c158f431dc607655aadea (Patch, Third Party Advisory)
usn.ubuntu.com/4379-1/ (vendor-advisory, Third Party Advisory)
usn.ubuntu.com/4382-1/ (vendor-advisory, Third Party Advisory)
lists.opensuse.org/opensuse-security-announce/2020-07/msg00080.html (vendor-advisory, Third Party Advisory)
lists.debian.org/debian-lts-announce/2020/08/msg00054.html (mailing-list, Third Party Advisory)
lists.debian.org/debian-lts-announce/2023/10/msg00008.html (mailing-list, Mailing List, Third Party Advisory)

Frequently asked questions

What is CVE-2020-13398?: CVE-2020-13398 is a high-severity vulnerability in Freerdp, classified under Out-of-bounds Write. CVSS score: 8.3/10. Published 2020-05-22.
How severe is CVE-2020-13398?: High severity. CVSS v3 base score is 8.3 out of 10.
Is CVE-2020-13398 known to be exploited?: 2 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.