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CVE-2026-27221 (GCVE-0-2026-27221)

Vulnerability from cvelistv5 – Published: 2026-03-10 21:41 – Updated: 2026-08-27 22:09
VLAI
Title
Acrobat Reader | Improper Certificate Validation (CWE-295)
Summary
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.
Severity
5.5 (Medium)
CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:N/I:H/A:N
SSVC
Exploitation: none Automatable: no Technical Impact: total
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-03-11 03:57 UTC
CWE
  • CWE-295 - Improper Certificate Validation (CWE-295)
Assigner
References
Impacted products
Vendor Product Version CPE status
Adobe Acrobat DC Affected: 0 , ≤ 25.001.21265 (custom)
Unaffected: 25.001.21288 (custom)
guessed Create a notification for this product.
Adobe Acrobat Reader DC Affected: 0 , ≤ 25.001.21265 (custom)
Unaffected: 25.001.21288 (custom)
guessed Create a notification for this product.
Adobe Acrobat 2024 Affected: 0 , ≤ 24.001.30307 (Win), 24.001.30308 (Mac) (custom)
Unaffected: 24.001.30356 (custom)
guessed Create a notification for this product.
Date Public
2026-03-10 17:00
Show details on NVD website
To clipboard 

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Forecast uses a logistic model when the trend is rising, or an exponential decay model when the trend is falling. Fitted via linearized least squares.

Sightings

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Nomenclature

  • Seen: The vulnerability was mentioned, discussed, or observed by the user.
  • Confirmed: The vulnerability has been validated from an analyst's perspective.
  • Published Proof of Concept: A public proof of concept is available for this vulnerability.
  • Exploited: The vulnerability was observed as exploited by the user who reported the sighting.
  • Patched: The vulnerability was observed as successfully patched by the user who reported the sighting.
  • Not exploited: The vulnerability was not observed as exploited by the user who reported the sighting.
  • Not confirmed: The user expressed doubt about the validity of the vulnerability.
  • Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.


Detection rules are retrieved from Rulezet.