How severe is CVE-2021-21085?

CVE-2021-21085 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-2021-21085 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 4% (90th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2021-21085?

CVE-2021-21085 affects Adobe Connect. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2021-21085?

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-2021-21085 published?

CVE-2021-21085 was published on 2021-03-12 and last updated on 2026-06-17.

CVE-2021-21085

CVE-2021-21085 is a high-severity vulnerability in Adobe Connect 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-20.

Key facts

Severity: High (CVSS 3.x base score 7.8)
CVSS v2: 6.8
EPSS exploit prediction: 4% (90th percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-20
Affected product: Adobe Connect
Published: 2021-03-12
Last modified: 2026-06-17

Description

Adobe Connect version 11.0.7 (and earlier) is affected by an Input Validation vulnerability in the export feature. An attacker could exploit this vulnerability by injecting a payload into an online event form and achieve code execution if the victim exports and opens the data on their local machine.

Frequently asked questions

What is CVE-2021-21085?: Adobe Connect version 11.0.7 (and earlier) is affected by an Input Validation vulnerability in the export feature. An attacker could exploit this vulnerability by injecting a payload into an online event form and achieve code execution if the victim exports and opens the data on their local machine.
How severe is CVE-2021-21085?: CVE-2021-21085 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-2021-21085 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 4% (90th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2021-21085?: CVE-2021-21085 affects Adobe Connect. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2021-21085?: 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-2021-21085 published?: CVE-2021-21085 was published on 2021-03-12 and last updated on 2026-06-17.

References

https://helpx.adobe.com/security/products/connect/apsb21-19.html

Affected products (1)

cpe:2.3:a:adobe:connect:*:*:*:*:*:*:*:*

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