How severe is CVE-2026-21331?

CVE-2026-21331 has a CVSS 3.x base score of 6.1, rated medium severity. It is exploitable over network with low attack complexity, requires no privileges and user interaction. Impact on confidentiality is low, integrity low, and availability none.

Is CVE-2026-21331 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (13th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2026-21331?

CVE-2026-21331 primarily affects Adobe Connect. In total, 3 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.

How do I fix CVE-2026-21331?

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

Does CVE-2026-21331 have an EU (EUVD) identifier?

Yes. CVE-2026-21331 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2026-22657.

When was CVE-2026-21331 published?

CVE-2026-21331 was published on 2026-04-14 and last updated on 2026-06-17.

CVE-2026-21331

CVE-2026-21331 is a medium-severity vulnerability in Adobe Connect with a CVSS 3.x base score of 6.1. 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-79.

Key facts

Severity: Medium (CVSS 3.x base score 6.1)
EPSS exploit prediction: 0% (13th percentile)
Actively exploited: Not listed in CISA KEV
EU (EUVD) id: EUVD-2026-22657
Weakness: CWE-79
Affected product: Adobe Connect
Published: 2026-04-14
Last modified: 2026-06-17

Description

Adobe Connect versions 2025.3, 12.10 and earlier are affected by a reflected Cross-Site Scripting (XSS) vulnerability. If an attacker is able to convince a victim to visit a URL referencing a vulnerable page, malicious JavaScript content may be executed within the context of the victim's browser. Scope is changed.

Frequently asked questions

What is CVE-2026-21331?: Adobe Connect versions 2025.3, 12.10 and earlier are affected by a reflected Cross-Site Scripting (XSS) vulnerability. If an attacker is able to convince a victim to visit a URL referencing a vulnerable page, malicious JavaScript content may be executed within the context of the victim's browser. Scope is changed.
How severe is CVE-2026-21331?: CVE-2026-21331 has a CVSS 3.x base score of 6.1, rated medium severity. It is exploitable over network with low attack complexity, requires no privileges and user interaction. Impact on confidentiality is low, integrity low, and availability none.
Is CVE-2026-21331 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (13th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2026-21331?: CVE-2026-21331 primarily affects Adobe Connect. In total, 3 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.
How do I fix CVE-2026-21331?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.
Does CVE-2026-21331 have an EU (EUVD) identifier?: Yes. CVE-2026-21331 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2026-22657.
When was CVE-2026-21331 published?: CVE-2026-21331 was published on 2026-04-14 and last updated on 2026-06-17.

References

https://helpx.adobe.com/security/products/connect/apsb26-37.html

Affected products (3)

cpe:2.3:a:adobe:connect:*:*:*:*:*:-:*:*
cpe:2.3:a:adobe:connect_desktop_application:*:*:*:*:*:macos:*:*
cpe:2.3:a:adobe:connect_desktop_application:*:*:*:*:*:windows:*:*

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