CVE-2026-83964: Adobe Connect is affected by an Improper Certificate Validation vulnerability that could lead to disclosure of

Q: How do I fix CVE-2026-83964?

connect: upgrade to 12.12; connect for mobile: upgrade to 4.5. Exact commands for each OS are on this page.

Q: Is CVE-2026-83964 being exploited?

CVE-2026-83964 is not on the CISA Known Exploited Vulnerabilities list at the time of the last update. Check again, as this can change.

Q: What does CVE-2026-83964 affect?

CVE-2026-83964 affects connect, connect for mobile. Severity is medium (CVSS 6.2). Adobe Connect is affected by an Improper Certificate Validation vulnerability that could lead to disclosure of sensitive memory. An attacker could leverage this vulnerability to disclose sensitive information. Exploitation of this issue doe

Q: How urgent is CVE-2026-83964?

Priority 25/100. No elevated risk signals yet.

Routine

MEDIUM 6.2UPGRADEUPGRADE

CVE-2026-83964 is a medium-severity flaw (CVSS 6.2) affecting connect, connect for mobile. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

Adobe Connect is affected by an Improper Certificate Validation vulnerability that could lead to disclosure of sensitive memory. An attacker could leverage this vulnerability to disclose sensitive information. Exploitation of this issue does not require user interaction.

Why this priority

No elevated risk signals yet

A fixed release or distro patch exists.

Risk facts

CVSS score	6.2 (Medium)
Attack vector	Local
Attack complexity	Low
Privileges needed	None
User interaction	None
EPSS exploit chance	0.2% (top 88%)
CISA exploited list	No
Weakness	CWE-295
Published	2026-09-22
Last modified	2026-09-26

Publisher (CNA): Adobe Systems Incorporated · Vendor: adobe

Last updated 2026-09-26 · Sources: CVE Program, NVD, CISA KEV, EPSS and vendor advisories · How we score

Am I affected?

Timeline

2026-09-22 19:16 UTCPublished CVE record published
2026-09-26 23:16 UTCUpdated Record last modified

adobe connect UPGRADE

Affected: < 12.12

Fixed in: 12.12

Safe to downgrade to: no unaffected older release

1. Check installed version

apt-cache policy connect || rpm -q connect || connect --version

2. UPGRADE to 12.12 (Debian / Ubuntu)

sudo apt update && sudo apt install --only-upgrade connect

2. UPGRADE (RHEL / Amazon Linux / Fedora)

sudo dnf upgrade connect

Note

Distros often backport fixes without changing the version number. Confirm with the distro advisory or changelog.

adobe connect for mobile UPGRADE

Affected: < 4.5

Fixed in: 4.5

Safe to downgrade to: no unaffected older release

1. Check installed version

apt-cache policy connect-for-mobile || rpm -q connect-for-mobile || connect-for-mobile --version

2. UPGRADE to 4.5 (Debian / Ubuntu)

sudo apt update && sudo apt install --only-upgrade connect-for-mobile

2. UPGRADE (RHEL / Amazon Linux / Fedora)

sudo dnf upgrade connect-for-mobile

Note

Distros often backport fixes without changing the version number. Confirm with the distro advisory or changelog.

Verify at the official source NVD · CVE Program · Report a problem with this page
Scores and fixes here are computed automatically from those and other public sources. Confirm with the vendor advisory before changing production systems.

Quick answers

How do I fix CVE-2026-83964?

connect: upgrade to 12.12; connect for mobile: upgrade to 4.5. Exact commands for each OS are on this page.

Is CVE-2026-83964 being exploited?

CVE-2026-83964 is not on the CISA Known Exploited Vulnerabilities list at the time of the last update. Check again, as this can change.

What does CVE-2026-83964 affect?

CVE-2026-83964 affects connect, connect for mobile. Severity is medium (CVSS 6.2). Adobe Connect is affected by an Improper Certificate Validation vulnerability that could lead to disclosure of sensitive memory. An attacker could leverage this vulnerability to disclose sensitive information. Exploitation of this issue doe

How urgent is CVE-2026-83964?

Priority 25/100. No elevated risk signals yet.

Related CVEs

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CVE-2026-27243 CRITICAL 9.3 UPGRADE UPGRADE Adobe Connect versions 2025.3, 12.10 and earlier are affected by a reflected Cross-Site Scripting (XSS) vulner
CVE-2026-27245 CRITICAL 9.3 UPGRADE UPGRADE Adobe Connect versions 2025.3, 12.10 and earlier are affected by a reflected Cross-Site Scripting (XSS) vulner
CVE-2026-21331 MEDIUM 6.1 UPGRADE UPGRADE Adobe Connect versions 2025.3, 12.10 and earlier are affected by a reflected Cross-Site Scripting (XSS) vulner

References

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