What is CVE-2021-40683?

CVE-2021-40683 is a high-severity vulnerability in Akamai Enterprise Application Access, classified under Unquoted Search Path or Element. CVSS score: 7.8/10. Published 2021-10-04.

How severe is CVE-2021-40683?

High severity. CVSS v3 base score is 7.8 out of 10.

Vulnerability in Akamai Enterprise Application Access

CVE-2021-40683

In Akamai EAA (Enterprise Application Access) Client before 2.3.1, 2.4.x before 2.4.1, and 2.5.x before 2.5.3, an unquoted path may allow an attacker to hijack the flow of execution.

Published 2021-10-04 · last modified 2026-06-17.

CVSS v3 metric

CVSS v3 base score 7.8 (High). Vector: CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H.

EPSS exploit prediction

EPSS: 0.004 (35.4th percentile), scored 2026-09-29.

Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 35th percentile — 35.4% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS over last 30 days · oldest: 0.004 · newest: 0.004 · change: 0.000

Affected products

Weakness classification (CWE)

CWE-428 — Unquoted Search Path or Element

References

www.akamai.com/products/enterprise-application-access (Product, Vendor Advisory)
akamai.com/blog/news/eaa-client-escalation-of-privilege-vulnerability (Exploit, Vendor Advisory)

Frequently asked questions

What is CVE-2021-40683?: CVE-2021-40683 is a high-severity vulnerability in Akamai Enterprise Application Access, classified under Unquoted Search Path or Element. CVSS score: 7.8/10. Published 2021-10-04.
How severe is CVE-2021-40683?: High severity. CVSS v3 base score is 7.8 out of 10.