CVE-2020-28194

Name: CVE-2020-28194
Creator: NVD / NIST
Published: 2021-02-01T14:15:12.24+00:00
License: https://creativecommons.org/publicdomain/zero/1.0/

CRITICALCVSS 9.8/10EPSS 2.70%

Last modified Jun 17, 2026

CVE-2020-28194 is a critical-severity vulnerability rated 9.8/10 on the CVSS scale. Variable underflow exists in accel-ppp radius/packet.c when receiving a RADIUS vendor-specific attribute with length field is less than 2. It has an impact only when the attacker controls the RADIUS server, which can lead to arbitrary code execution.. EPSS estimates a 2.70% chance of exploitation in the next 30 days.

Description

Variable underflow exists in accel-ppp radius/packet.c when receiving a RADIUS vendor-specific attribute with length field is less than 2. It has an impact only when the attacker controls the RADIUS server, which can lead to arbitrary code execution.

Metrics

CVSS 3.1

9.8/10

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

EPSS Probability

2.70%

84.0th percentile

Probability of exploitation in the next 30 days. Learn more

Weakness Enumeration

CWE-191

Affected Software

Vendor	Product	Versions
Accel-Ppp	Accel-Ppp	< 1.12.0-e9d369a

References

https://github.com/accel-ppp/accel-ppp/commit/e9d369aa0054312b7633e964e9f7eb323f1f3d69Patch, Third Party Advisory
https://github.com/accel-ppp/accel-ppp/security/advisories/GHSA-2m44-rh3c-x4grPatch, Third Party Advisory
https://github.com/accel-ppp/accel-ppp/commit/e9d369aa0054312b7633e964e9f7eb323f1f3d69Patch, Third Party Advisory
https://github.com/accel-ppp/accel-ppp/security/advisories/GHSA-2m44-rh3c-x4grPatch, Third Party Advisory

Timeline

Published: Feb 1, 2021
Last Modified: Jun 17, 2026
Status: Modified

Frequently Asked Questions

What is CVE-2020-28194?

How severe is CVE-2020-28194?

CVE-2020-28194 has a CVSS score of 9.8/10 (CRITICAL severity). The EPSS model estimates a 2.70% probability of exploitation in the next 30 days.

How do I fix CVE-2020-28194?

Check the vendor references and advisories linked above for patched versions and mitigation guidance. You can also run a Strix scan to test if your systems are affected.

Are you affected by CVE-2020-28194?

Run a free Strix scan to check your systems for this vulnerability.

Scan your code now

Source: NVD / NIST