How severe is CVE-2021-40712?

CVE-2021-40712 has a CVSS 3.x base score of 6.5, rated medium severity. It is exploitable over network with low attack complexity, requires low privileges and no user interaction. Impact on confidentiality is none, integrity none, and availability high.

Is CVE-2021-40712 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 2% (74th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2021-40712?

CVE-2021-40712 affects Adobe Experience Manager. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2021-40712?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.

When was CVE-2021-40712 published?

CVE-2021-40712 was published on 2021-09-27 and last updated on 2026-06-17.

CVE-2021-40712

CVE-2021-40712 is a medium-severity vulnerability in Adobe Experience Manager with a CVSS 3.x base score of 6.5. 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-20.

Key facts

Severity: Medium (CVSS 3.x base score 6.5)
CVSS v2: 4.0
EPSS exploit prediction: 2% (74th percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-20
Affected product: Adobe Experience Manager
Published: 2021-09-27
Last modified: 2026-06-17

Description

Adobe Experience Manager version 6.5.9.0 (and earlier) is affected by a improper input validation vulnerability via the path parameter. An authenticated attacker can send a malformed POST request to achieve server-side denial of service.

Frequently asked questions

What is CVE-2021-40712?: Adobe Experience Manager version 6.5.9.0 (and earlier) is affected by a improper input validation vulnerability via the path parameter. An authenticated attacker can send a malformed POST request to achieve server-side denial of service.
How severe is CVE-2021-40712?: CVE-2021-40712 has a CVSS 3.x base score of 6.5, rated medium severity. It is exploitable over network with low attack complexity, requires low privileges and no user interaction. Impact on confidentiality is none, integrity none, and availability high.
Is CVE-2021-40712 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 2% (74th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2021-40712?: CVE-2021-40712 affects Adobe Experience Manager. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2021-40712?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.
When was CVE-2021-40712 published?: CVE-2021-40712 was published on 2021-09-27 and last updated on 2026-06-17.

References

https://helpx.adobe.com/security/products/experience-manager/apsb21-82.html

Affected products (1)

cpe:2.3:a:adobe:experience_manager:*:*:*:*:*:*:*:*

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