How severe is CVE-2021-40683?

CVE-2021-40683 has a CVSS 3.x base score of 7.8, rated high severity. It is exploitable over local access with low attack complexity, requires no privileges and user interaction. Impact on confidentiality is high, integrity high, and availability high.

Is CVE-2021-40683 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (34th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2021-40683?

CVE-2021-40683 affects Akamai Enterprise Application Access. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2021-40683?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its high severity, prioritise patching exposed systems.

When was CVE-2021-40683 published?

CVE-2021-40683 was published on 2021-10-04 and last updated on 2026-06-17.

CVE-2021-40683

CVE-2021-40683 is a high-severity vulnerability in Akamai Enterprise Application Access with a CVSS 3.x base score of 7.8. It is not currently listed as actively exploited by CISA, and its EPSS exploit-prediction score is low. The underlying weakness is classified as CWE-428.

Key facts

Severity: High (CVSS 3.x base score 7.8)
CVSS v2: 4.4
EPSS exploit prediction: 0% (34th percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-428
Affected product: Akamai Enterprise Application Access
Published: 2021-10-04
Last modified: 2026-06-17

Description

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.

Frequently asked questions

What is 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.
How severe is CVE-2021-40683?: CVE-2021-40683 has a CVSS 3.x base score of 7.8, rated high severity. It is exploitable over local access with low attack complexity, requires no privileges and user interaction. Impact on confidentiality is high, integrity high, and availability high.
Is CVE-2021-40683 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (34th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2021-40683?: CVE-2021-40683 affects Akamai Enterprise Application Access. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2021-40683?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its high severity, prioritise patching exposed systems.
When was CVE-2021-40683 published?: CVE-2021-40683 was published on 2021-10-04 and last updated on 2026-06-17.

References

Affected products (1)

cpe:2.3:a:akamai:enterprise_application_access:*:*:*:*:*:*:*:*

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