CVE-2026-34621

highpriority · act · 90OT risk · criticalKEV · exploitedEPSS 0.072 · 94 %ileexploit · PoCDEEUNLRUUS

grimoire priorityP0 · Act now

Exploitable?

Yes · in the wild

CISA KEV · 5 exploits · PoC

Likely / severe?

7.23% (94th) EPSS

CVSS 8.8 · high

Is it mine?

23 products

Check your exposure

Who says so?

6 sources

cnnvd · enisa_euvd · fstec_bdu · cert_bund

added 2026-04-13remediate by 2026-04-27

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

EPSS · scored 2026-10-27

Adobe Acrobat and Reader Prototype Pollution Vulnerability

Acrobat Reader versions 24.001.30356, 26.001.21367 and earlier are affected by an Improperly Controlled Modification of Object Prototype Attributes ('Prototype Pollution') vulnerability that could result in arbitrary code execution in the context of the current user. Exploitation of this issue requires user interaction in that a victim must open a malicious file.

cvss

Technical severity, 0–10. One row per scoring source.

9.6

010

base score 0–10 · higher = more severe · hover a vector to decode⚠ sources disagree · high–critical · 8.6–9.6

v3.18.8highAV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:Hsecondary · FSTEC (BDU) RU

v3.18.6highCVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:C/C:H/I:H/A:Hsecondary · ENISA EU

v3.18.6highCVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:C/C:H/I:H/A:Hsecondary · psirt@adobe.comexploitability 1.8 · impact 6

v3.18.6highCVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:C/C:H/I:H/A:H/E:Hsecondary · CVSS-BT (t0sche)

v3.19.6criticalCVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:H/I:H/A:Hsecondary · NCSC-NL NL

ssvc

A stakeholder decision — act, attend, or track — from exploitation and impact.

Exploitation: active · Automatable: no · Technical Impact: totalcoordinatorcisa_ssvcUS

weaknesses

The CWE weakness classes this flaw belongs to.

CWE-1321USCWE-1321USCWE-1321US

exploits (5)

Public proof-of-concept and weaponised exploit code.

KeulenR01/Remediate-AdobeAcrobat-CVE-2026-34621KeulenR01/Remediate-AdobeAcrobat-CVE-2026-34621PoC · poc_in_github
NULL200OK/cve_2026_34621_advancedA sophisticated, cross-platform exploit generator for **CVE-2026-34621** – a critical prototype pollution vulnerability in Adobe Acrobat and Reader that leads to sandbox escape and arbitrary code execution on Windows and macOS.PoC · poc_in_github
azefzafyoussef/CVE-2026-34621azefzafyoussef/CVE-2026-34621PoC · poc_in_github
ercihan/CVE-2026-34621ercihan/CVE-2026-34621PoC · poc_in_github
ercihan/CVE-2026-34621_PDF_SAMPLEercihan/CVE-2026-34621_PDF_SAMPLEPoC · poc_in_github

affected products (23)

Products and version ranges known to be affected.

Adobe Acrobat DC <26.001.21411all versionscert_bundDE
Adobe Acrobat Mac <24.001.30360all versionscert_bundDE
Adobe Acrobat Reader <=26.001.21367all versionscert_bundDE
Adobe Acrobat Reader DC <26.001.21411all versionscert_bundDE
Adobe Acrobat Windows <24.001.30362all versionscert_bundDE
Adobe Acrobat≤ Mac <24.001.30360cert_bundDE
Adobe Acrobat≤ Windows <24.001.30362cert_bundDE
Adobe Acrobat DC< 26.001.21411cert_bundDE
Adobe Acrobat Reader≤ 26.001.21367cert_bundDE
Adobe Acrobat Reader DC< 26.001.21411cert_bundDE
Adobe Acrobat Reader≤ 0 ≤26.001.21367enisa_euvdEU
Adobe Systems Inc. Adobe Acrobat 2024≤ 24.001.30360fstec_bduRU
Adobe Systems Inc. Adobe Acrobat 2024≤ 24.001.30362fstec_bduRU
Adobe Systems Inc. Adobe Acrobat Document Cloud≤ 26.001.21411fstec_bduRU
Adobe Systems Inc. Adobe Acrobat Reader Document Cloud≤ 26.001.21411fstec_bduRU
Adobe Acrobat 2024≤ vers:unknown/*ncsc_nlNL
Adobe Acrobat DC≤ vers:unknown/*ncsc_nlNL
Adobe Acrobat Reader≤ vers:unknown/*ncsc_nlNL
Adobe Acrobat Reader DC≤ vers:unknown/*ncsc_nlNL
adobe acrobat24.0.0 → 24.001.30360nvdUScpe:2.3:a:adobe:acrobat:*:*:*:*:*:*:*:*

showing 20 of 23

advisories (2)

Vendor and ecosystem advisories describing this.

NCSC-2026-0111Kwetsbaarheid verholpen in Adobe AcrobatNL2026-04-12csaf · ncsc_nlNL
Adobe heeft een kwetsbaarheid verholpen in Adobe Acrobat DC, Actobat Reader DC en Acrobat 2024.
WID-SEC-W-2026-1047Adobe Acrobat Reader: Schwachstelle ermöglicht Offenlegung von Informationen und CodeausführungDeutsch2026-04-09csaf · cert_bundDE
Ein lokaler Angreifer kann eine Schwachstelle in Adobe Acrobat Reader ausnutzen, um vertrauliche Informationen offenzulegen und beliebigen Code auszuführen, was zu einer vollständigen Kompromittierung des Systems führen könnte.

also known as (5)

Other names and identifiers for this entity.

sources

Which sources assert this record, and when.

cnnvd enisa_euvd fstec_bdu cert_bund ncsc_nl nvd NVD CVE.org MITRE

published 2026-04-11modified 2026-10-26

references (4)

External citations — patches, advisories, analysis.

scry

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