5.5Medium
Adobe Acrobat Dc
CVE-2026-27221
Acrobat Reader versions 24.001.30307, 24.001.30308, 25.001.21265 and earlier are affected by an Improper Certificate Validation vulnerability that could result in a Security feature bypass. An attacker could leverage this vulnerability to spoof the identity of a signer. Exploitation of this issue requires user interaction.
What this means for your business
- It affects Adobe Acrobat Dc. It matters if your company, or a supplier that handles your data, runs it.
- An attacker can use it only with access to the machine itself, without a login, but only after tricking someone into an action such as opening a file or a link.
What to do
- 1Check whether your company or your suppliers run Adobe Acrobat Dc, and which version. The affected versions are listed further down this page.
- 2If you do, apply the vendor's fix. A patch or vendor advisory has been published.
Not sure if your company is exposed?
Fastnexa’s certified penetration testers can check whether attackers could use this flaw, or others like it, against your websites, apps and network. The full test is free for our first 10 founding clients until 31 December 2026.
Scoring
- CVSS
- 5.5 (v3.1)
- Vector
CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:N/I:H/A:N- Weakness
- CWE-295
- Assigned by
- psirt@adobe.com
Dates
- Published
- 2026-03-10
- Last modified
- 2026-08-28
- Sources
- NVD
Affected products
- Adobe Acrobat Dc- 25.001.21288
- Apple Macosall versions
- Microsoft Windowsall versions
- Adobe Acrobat Reader Dc- 25.001.21288
- Adobe Acrobat24.001.20604 - 24.001.30356
As listed in the NVD configuration data. Not a statement about your estate.