CVE-2026-21355
Official description Straight from the sourceThe vendor's or NVD's own wording, published unedited. Authoritative, but often terse — it says what broke, rarely what to do.
NVD · uneditedDNG SDK versions 1.7.1 2410 and earlier are affected by an out-of-bounds read vulnerability that could lead to memory exposure. An attacker could leverage this vulnerability to disclose sensitive information stored in memory. Exploitation of this issue requires user interaction in that a victim must open a malicious file.
Technical summary Written by usOur analysis, written from the advisory, the CVSS vector and the affected-version data. It adds context the advisory leaves out, and never invents facts that are not in the source.
dbcve analysis · high confidenceThe DNG SDK (Adobe Digital Negative format) versions 1.7.1 2410 and earlier contain an out-of-bounds read vulnerability during DNG file processing. An attacker can craft a malicious DNG file that, when opened by a victim, allows memory exposure and disclosure of sensitive information stored in process memory.
Verify against the referenced sources before acting — the references below are authoritative for this CVE, this summary is not.
Affected products & versions What the vendor confirmedThe version ranges the vendor confirmed as vulnerable. If your version sits inside a range here, treat yourself as exposed until you have upgraded.
NVD · CPE data< 1.7.2CVSS breakdown How the score is builtThe industry scoring standard. It rates how the flaw is reached, what it takes to exploit, and what an attacker gains — the score is derived from those, not the other way round.
From the vector- Attack vector
- Local
- Complexity
- Low
- Privileges
- None
- User interaction
- Required
- Scope
- Unchanged
- Confidentiality
- High
- Integrity
- None
- Availability
- None
CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:N/A:N
Am I affected? How to checkSteps we derive from the advisory and the affected-version data, so you can decide whether this CVE reaches your setup. They are a guide, not a scan — your own configuration is the authority.
dbcve checksWork through these to decide whether this CVE applies to you.
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Identify applications that process DNG filesSearch the system for software capable of handling Digital Negative (DNG) format files. Check installed photo editing, raw processing, or imaging applications that may bundle the Adobe DNG SDK. Common indicators include file associations with .dng extension or presence of DNG-related libraries.Affected if Any application that uses the Adobe DNG SDK to process DNG files is potentially affected.
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Determine the DNG SDK version in useLocate the DNG SDK library or DLL bundled with the application. For Adobe products, check the version info of dng_sdk.dll or similar library files. Compare the version number to the affected range: versions before 1.7.2 (specifically 1.7.1 2410 and earlier).Affected if The installed DNG SDK version is 1.7.1 2410 or earlier (any version prior to 1.7.2).
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Verify DNG file processing is enabledConfirm that the application has DNG file handling functionality active. Check if the software is configured to open, preview, or process .dng files. Look for file type associations or import handlers for DNG format.Affected if DNG file processing capability is enabled or the application is configured to handle DNG files from any source.
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Inspect recent DNG file processing activityReview application logs, recent file history, or temp directories for evidence of DNG file operations. Check if the affected software has been used to open DNG files from external or untrusted sources.Affected if DNG files have been opened or processed by the vulnerable application, particularly from untrusted sources.
A system is affected if it runs any application that bundles the Adobe DNG SDK version 1.7.1 2410 or earlier and that application processes DNG files.
Generated from the published advisory. Verify against your own configuration.
Remediation Closing itWhat it takes to close this. Where a vendor fix exists we point at it; where none exists we say so plainly, and can build one. Effort estimates are scoped from the advisory, not from your codebase.
dbcve · scoped1.7.2
Update the DNG SDK to a patched version beyond 1.7.1 2410. Until patched, advise users to avoid opening DNG files from untrusted sources.
1.7.2
- Navigate to the official Adobe helpx.adobe.com page for DNG Software Development Kit
- Download DNG SDK version 1.7.2 or later from the official Adobe source
- Verify the downloaded package integrity using checksums if available
- Replace the existing DNG SDK installation with version 1.7.2
- Rebuild any applications that depend on the DNG SDK
- Test applications with the updated SDK to ensure proper functionality
Generated from the published advisory — verify against the referenced sources before acting.
- Consultation3.0 h
- Implementation4.0 h
- Testing4.0 h
- Review / QA2.0 h
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Scan for this in your stack
Free · runs locallyCheck whether your project pulls in CVE-2026-21355 — or any other known-vulnerable package — straight from your lock files. Free and open source; it runs locally and uploads nothing.
References Go to the primary sourcePrimary sources — vendor advisories, patches and trackers. Where our summary and a reference disagree, the reference wins.
Primary sourcesPractitioner notes
ContributedPeer-ranked notes from engineers who’ve handled CVE-2026-21355 in production — separate from our analysis above.
The advisory tells you what broke. It rarely tells you what actually worked. If you’ve dealt with this one, that detail is what the next engineer is searching for.
- The version that genuinely resolved it — not the one the vendor claimed
- A config change or rule that shut the vector down
- A gotcha in the upgrade path that cost you an afternoon
No notes yet
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- Verified mitigations, workarounds, and config changes
- Version or environment caveats, and links to real fixes
- No weaponised exploit code, or anything meant to cause harm
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