NVD / CVE Program· CNA adobe

CVE-2026-34621: Acrobat Reader | Improperly Controlled Modification of Object Prototype Attributes ('Prototype Pollution') (CWE-1321)

HighCVSS 8.6 · v3.1KEVWeaponized No fix recorded

Noroxi assessment

Priority: This week (action score 66/100)

CISA has confirmed exploitation in the wild (Apr 13, 2026). Remediation deadline for US federal agencies: Apr 27, 2026.
Probability of exploitation in the next 30 days: 7.3% (FIRST EPSS); higher than 94.4% of all records.
Someone with local access to the system can trigger it. No account or password is required. A user must open a link or visit a page. No special conditions are required; it is repeatable.
According to the record, no fixed version is available yet.
Mentioned 1 time in Turkish national cyber security advisories (siberguvenlik.gov.tr).

Don’t wait for the next maintenance window. Until a fix is released, restrict access to the affected component and follow the vendor's advisory.

Generated automatically from the record's data: CVSS (NVD and CNA), CISA KEV and SSVC, FIRST EPSS, exploit sources, fixed versions. How we calculate it

Primary sources: NVD · CVE.org · CISA KEV · FIRST EPSS

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.

BDU:2026-04929

Published: Apr 11, 2026
Updated: Oct 26, 2026
EPSS: 7.3% · 94th percentile
CWE: CWE-1321

Report tools

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Action score

This week

Don’t wait for the next maintenance window.

CVSS: 34 / 40 · 8.6 / 10
CISA KEV: 30 / 30 · Listed
EPSS: 2 / 30 · 7.3%

CISA SSVC decision

Exploitation: active
Automatable: no
Technical impact: total

Vulnrichment: CISA's decision-tree inputs.

CNA vs NVD score

NVD: —
CNA · adobe: 8.6; NVD has not scored this yet; the score shown is the CNA’s.

The score given by the assigning authority versus NVD’s independent score. A gap means the severity is contested.

Actively exploited in the wild

CISA added this to its Known Exploited Vulnerabilities catalog on Apr 13, 2026. That signals real attacks, not theory.

Remediation deadline for US federal agencies: Apr 27, 2026.

Get told when this record changes

In CISA KEV: exploitation in the wild confirmed
Weaponized exploit exists
No fixed version yet

If any of these changes, we'll tell you in the daily email digest.

Is your version affected? Check it

Noroxi analysis

What does it mean in your environment?

The assessment above is generated automatically from the record's data; it doesn't know your environment. Our team verifies on your systems whether this vulnerability is actually exploitable and which mitigation is enough.

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Affected systems

Is your version affected?

Pick the product and type the version you run. It's compared with this record's version ranges in your browser; the version isn't sent anywhere.

Vendor	Product	CPE
adobe	acrobat dc	cpe:2.3:a:adobe:acrobat_dc
adobe	acrobat reader dc	cpe:2.3:a:adobe:acrobat_reader_dc
adobe	acrobat	cpe:2.3:a:adobe:acrobat
apple	macos	cpe:2.3:o:apple:macos
microsoft	windows	cpe:2.3:o:microsoft:windows

Versions reported by the vendor

Affected version ranges reported by the assigning authority (adobe). Independent of NVD's CPE analysis and usually ahead of it.

Adobe Acrobat 2024
- 24.001.30362 (Win), 24.001.30360 (Mac)not affected
- up to and including 24.001.30356affected
Adobe Acrobat DC
- 26.001.21411not affected
- up to and including 26.001.21367affected
Adobe Acrobat Reader DC
- 26.001.21411not affected
- up to and including 26.001.21367affected

Affected versions · NVD (4)

NVD version ranges (for catalog products). Add the product to your stack with a version and matching uses these.

adobe acrobat24.0.0 and later · before 24.001.30362
adobe acrobat24.0.0 and later · before 24.001.30360
adobe acrobat dcbefore 26.001.21411
adobe acrobat reader dcbefore 26.001.21411

Same product

adobe: all records

Other highest-scoring records for the same primary product.

CVE-2021-28550Adobe Acrobat Reader use after free vulnerability could lead to arbitrary code executionKEV
81Now
CVE-2023-21608Adobe Acrobat Reader DC resetForm Use-After-Free Remote Code Execution VulnerabilityKEV
79This week
CVE-2018-4990Adobe Acrobat and Reader versions 2018.011.20038 and earlier, 2017.011.30079 and earlier, and 2015.006.30417 and earlier have a Double Free…KEV
76This week

Published before and after this one in the same product

← EarlierCVE-2026-27221Mar 10, 2026 · Acrobat Reader | Improper Certificate Validation (CWE-295)
22Monitor
← EarlierCVE-2026-27278Mar 10, 2026 · Acrobat Reader | Use After Free (CWE-416)
31Monitor
Later →CVE-2026-47915Jun 9, 2026 · Acrobat Reader | Use After Free (CWE-416)
31Monitor

Remediation

Which version to upgrade to

Fix versions compiled from the vendor, package registries and Microsoft. Verify the vendor's note before upgrading.

No fix version is recorded for this entry. Check the references for vendor advisories.

Exploit status

Weaponized

A ready exploit tool or active in-the-wild use is known for this vulnerability. This should be your top priority.

Evidence

Proof-of-concept repository on GitHub ×6

Noroxi does not host or link to exploit code. Metasploit module names and Nuclei template ids are shown (names, not code); Exploit-DB entries and PoC repositories are given as counts only.

Public exploit evidence
Source	Kind	Date
Proof-of-concept repository on GitHub	6 repositories	2026-04-13 → 2026-11-12

Research context

For pentesters and researchers: attack profile, score disagreement, timeline, patch commits, credits, variant and chain candidates, bug bounty scope. All derived from existing data; no exploit code.