Adobe Acrobat Use-After-Free Vulnerability

Adobe Acrobat and Reader versions 2020.009.20074 and earlier, 2020.001.30002, 2017.011.30171 and earlier, and 2015.006.30523 and earlier have an use-after-free vulnerability. Successful exploitation could lead to arbitrary code execution .

CheckOps priority index

5.9/10 Patch within 7 days

Severity7.8

Probability3.3

Exploitation3/5

Severity = CVSS. Probability = EPSS (FIRST). Exploitation = public signals: KEV, EUVD, ransomware, EPSS above 10 %, no account required.

EPSS · today 33.3% −0.2 pts in 7 days

CVSS 3.1 7.8 AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:

Exploited for 204 days 13 Apr 2026

CISA due date 27 Apr 2026 for US federal agencies

Exploitation probability EPSS · FIRST

EPSS probability (%)Percentile among all CVEs

Exploitation signals 3 / 5

KEV catalog (CISA)13 Apr 2026
Exploited in EUVD (ENISA)13 Apr 2026
Used by ransomwareno
EPSS above 10 %33.3%
No account, over the networkno

What to do

Fix

Apply the vendor’s fix as soon as it is available.

CISA guidance: Apply mitigations per vendor instructions, follow applicable BOD 22-01 guidance for cloud services, or discontinue use of the product if mitigations are unavailable.

Meanwhile

Take the service off the internet or restrict access to it, watch the logs and look for signs of compromise.

Manufacturers (CRA)

Exploited vulnerability in your product: early warning to ENISA within 24 h, then notification within 72 h (Article 14 of the Cyber Resilience Act). The CRA explained

Affected products

Adobe Acrobat and ReaderAcrobat

Affected versions

2020.009.20074 and earlier, 2020.001.30002, 2017.011.30171 and earlier, and 2015.006.30523 and earlier versions

Weaknesses (CWE)

CWE-416

Open source packages OSV

Affected libraries according to OSV, with fixed versions.

Timeline

19 Aug 2020
Published
13 Apr 2026
Exploitation reported (ENISA)
13 Apr 2026
Added to the KEV catalog
27 Apr 2026
CISA remediation due date
26 Sept 2026
EPSS peak: 48.6%

References

Other exploited vulnerabilities from the same vendor

CVE-2026-48356Adobe Commerce and Magento Unrestricted Upload of File with Dangerous Type Vulnerability
7.5 · Rising fast
CVE-2026-71362Adobe Commerce and Magento Incorrect Authorization Vulnerability
8.8 · Actively exploited
CVE-2026-75650Adobe Commerce and Magento Improper Neutralization of Special Elements Used in a Template Engine Vulnerability
5.9 · Actively exploited
CVE-2026-48282Adobe ColdFusion Path Traversal Vulnerability
7.7 · Actively exploited
CVE-2009-3459Adobe Acrobat and Reader Heap-Based Buffer Overflow Vulnerability
8.5 · Actively exploited
CVE-2026-34621Adobe Acrobat and Reader Prototype Pollution Vulnerability
4.9 · Background exploitation