9.8

CVE-2021-40719: adobe connect Deserialization of Untrusted Data

CVSS: 9.8v3.0CriticalModified
Published 21-10-2021Last modified 23-04-2025
Open JSON

Vulnerability summary

CVE-2021-40719 is a critical (CVSS 9.8) Deserialization of Untrusted Data vulnerability in adobe connect. EPSS estimates a 3.53% chance of exploitation in the next 30 days, higher than 89% of scored vulnerabilities.

Overall risk
70/100
0100
High · default modelHow is this calculated?
CVSS score
9.8/10
010
Critical · v3.0 (CVE.org)
EPSS score
3.53%
0%100%
Low · 0.00 pp in 30 days
KEVNot listedIn no KEV catalog
RansomwareNone recordedNo known use recorded
Public exploits0No public exploits recorded

Timeline

  1. 21-10-2021
    PublishedVulnerability first disclosed.
  2. 23-04-2025
    Last modifiedVulnerability information updated.

Description

Adobe Connect version 11.2.3 (and earlier) is affected by a Deserialization of Untrusted Data vulnerability to achieve arbitrary method invocation when AMF messages are deserialized on an Adobe Connect server. An attacker can leverage this to execute remote code execution on the server.

CVSS metrics

3 scores · 2 sources · 2 versions

EPSS trend

Probability

3.53%

Chance of exploitation in the next 30 days

Percentile

89%

Versus all other CVEs

30-day change

0.00 pp

From 3.53% on 18-09-2026

18-09-202618-10-2026
EPSS score
3.53%

Known exploited

Compare KEV catalogs

Not in any of the 3 tracked catalogs.

Public exploits

0 found

No public exploits indexed.

Weaknesses

CWE · root cause

Affected systems

Adobe1 product
  • connect≥ unspecified, ≤ 11.2.3 | ≥ unspecified, ≤ None | ≤ 11.2.3

1 vendor · 1 product

References

1 links