CVE-2026-21347

Code execution via malicious-file integer overflow

Published Feb 10, 2026 · Updated Feb 10, 2026

Integer overflow in Adobe Bridge 15.1.3, 16.0.1 and earlier allows attackers to execute code after a user opens a malicious file. Adobe has not disclosed the affected file format, parser, or integer calculation that wraps while processing the crafted file. The victim must open the file, and successful exploitation runs arbitrary code with the victim's privileges on Windows or macOS.

CVSS severity7.8
High
EPSS probability0.17%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Integer overflow in Adobe Bridge 15.1.3, 16.0.1 and earlier allows attackers to execute code after a user opens a malicious file. Adobe has not disclosed the affected file format, parser, or integer calculation that wraps while processing the crafted file. The victim must open the file, and successful exploitation runs arbitrary code with the victim's privileges on Windows or macOS.

The record

CVE
CVE-2026-21347
Published
Feb 10, 2026
Updated
Feb 10, 2026
Vendor
Adobe
Product
Adobe Bridge
Classifications
CWE-190, CAPEC-92, T1204.002, T1203
Attack vector
local
Privileges
unauthenticated

Timeline

How it unfolded

  1. Feb 10, 2026CVE publishedPublication date reported by the CVE source.
  2. Feb 10, 2026Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

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Is a vulnerable build present?

Compare these published version ranges with your installed build and any vendor patches.

  1. Affected versionversion=0 <=16.0.1

What conditions does exploitation require?

Attack vectorlocal
Required privilegesunauthenticated

What is affected?

Adobe · Adobe Bridgeversion=0 <=16.0.1

Published CVSS scores

7.8AdobeCVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.

Daily unique IPsNo honeypot observations are available for this CVE in the selected window.

No observations available

Sep 10, 2026Sep 16, 2026
Latest reporting daySep 16, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectorlocal
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-190Integer Overflow or Wraparound
CAPEC-92Forced Integer Overflow
T1204.002Malicious File
T1203Exploitation for Client Execution

Public exploit references

No public exploit references are available in this record.

Labels summarize the accepted research assessment. They do not indicate a test against your environment.

Technologies

Your stack

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Your stack

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