Medium severity · published Sep 8, 2026
CVE-2026-81977
Acrobat Reader | Integer Underflow (Wrap or Wraparound) (CWE-191)
5.5
CVSS
0.3%
EPSS
No
On KEV
Description
Acrobat Reader is affected by an Integer Underflow (Wrap or Wraparound) vulnerability that could lead to disclosure of sensitive memory. An attacker could leverage this vulnerability to disclose sensitive information. Exploitation of this issue requires user interaction in that a victim must open a malicious file.
CVSS vector
CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:N/A:N
Attack vector
Local
Complexity
Low
Privileges
None
User interaction
Required
Confidentiality
High
Integrity
None
Availability
None
Scope
Unchanged
Exploitation
Is it being used?
Exploit prediction (EPSS)0.3% · higher than 18% of CVEs
Exploited in the wildNo evidence yet
CISA KEVNot listed
Ransomware campaign useNot known
Affected products
Which versions
A2
Acrobat 2024 · Adobe
through 24.001.30383 · source: vendor
AR
Acrobat Reader · Adobe
through 26.002.21900 · source: vendor
AA
Adobe Acrobat · Adobe
through 26.002.21900 · source: vendor
AC
Acrobat · Adobe
24.001.20604 before 24.001.30429 · source: NVD
AD
Acrobat DC · Adobe
15.008.20082 before 26.002.21901 · source: NVD
AR
Acrobat Reader DC · Adobe
15.008.20082 before 26.002.21901 · source: NVD
In the news
VulnerabilityLow
ZDI-26-672: Adobe Acrobat Reader DC PDF File Parsing Integer Underflow Information Disclosure Vulnerability
This vulnerability allows remote attackers to disclose sensitive information on affected installations of Adobe Acrobat Reader DC. User interaction is required to exploit this vulnerability in that the target must visit a malicious page or open a malicious file. The ZDI has assigned a CVSS rating of 3.3. The following CVEs are assigned: CVE-2026-81977.
Sep 10, 2026·Zero Day Initiative
References
NVD
https://nvd.nist.gov/vuln/detail/CVE-2026-81977
CVE.org
https://www.cve.org/CVERecord?id=CVE-2026-81977
Vendor Advisory
https://helpx.adobe.com/security/products/acrobat/apsb26-141.html
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