What is CVE-2021-42054?

CVE-2021-42054 is a high-severity vulnerability in Accel-Ppp, classified under Out-of-bounds Read. CVSS score: 7.5/10. Published 2021-10-07.

How severe is CVE-2021-42054?

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

Out-of-bounds Read in Accel-Ppp

CVE-2021-42054

ACCEL-PPP 1.12.0 has an out-of-bounds read in triton_context_schedule if the client exits after authentication.

Vulnerability class: Buffer Overflow

Published 2021-10-07 · 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:N/I:N/A:H.

EPSS exploit prediction

EPSS: 0.011 (65.3th percentile), scored 2026-10-07.

Low probability of exploitation in the next 30 days, but still tracked. 65th percentile — 65.3% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS over last 30 days · oldest: 0.011 · newest: 0.011 · change: 0.000

Affected products

Accel-Ppp — versions 1.12.0

Weakness classification (CWE)

CWE-125 — Out-of-bounds Read

References

github.com/xebd/accel-ppp/issues/156 (Exploit, Third Party Advisory, Issue Tracking)

Frequently asked questions

What is CVE-2021-42054?: CVE-2021-42054 is a high-severity vulnerability in Accel-Ppp, classified under Out-of-bounds Read. CVSS score: 7.5/10. Published 2021-10-07.
How severe is CVE-2021-42054?: High severity. CVSS v3 base score is 7.5 out of 10.