CVE-2021-26607
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 · uneditedAn Improper input validation in execDefaultBrowser method of NEXACRO17 allows a remote attacker to execute arbitrary command on affected systems.
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 confidenceA command injection vulnerability exists in the execDefaultBrowser method of NEXACRO17 due to improper input validation. The method accepts user-supplied input without proper sanitization and passes it to system command execution, allowing remote attackers to execute arbitrary commands on affected systems.
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<= 17.1.3.301CVSS 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
- Network
- Complexity
- Low
- Privileges
- None
- User interaction
- None
- Scope
- Unchanged
- Confidentiality
- High
- Integrity
- High
- Availability
- High
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
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 if Tobesoft Nexacro 17 is installedSearch for Nexacro installation directories or check installed programs on the systemAffected if Tobesoft Nexacro 17 is found on the system
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Determine the installed Nexacro versionCheck the version information of the installed Nexacro 17 application or its runtime componentsAffected if The version is 17.1.3.301 or lower
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Identify usage of the execDefaultBrowser methodSearch application source code, scripts, or configuration files for calls to the execDefaultBrowser methodAffected if The execDefaultBrowser method is invoked in any application or script
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Inspect input validation on execDefaultBrowser callsExamine the code or configuration that invokes execDefaultBrowser to determine if user-supplied input is passed directly to the method without sanitizationAffected if User input flows to execDefaultBrowser without proper validation or sanitization
The environment is affected if Tobesoft Nexacro 17 version 17.1.3.301 or lower is installed AND the execDefaultBrowser method is used with unsanitized user input.
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 · scopedImplement strict input validation and sanitization for all parameters passed to the execDefaultBrowser method, preferably using allowlist validation and avoiding direct command concatenation.
Contact TOBESOFT for the specific fixed release (version > 17.1.3.301)
- Contact TOBESOFT (the vendor) to obtain the specific fixed version of Nexacro newer than 17.1.3.301
- Upgrade Nexacro to the fixed version provided by the vendor
- Verify the upgrade was successful by checking the execDefaultBrowser method behavior
Generated from the published advisory — verify against the referenced sources before acting.
- Consultation2.0 h
- Implementation4.0 h
- Testing3.0 h
- Review / QA2.0 h
An estimate, not a bill — we confirm scope with you before any work starts. Need it this week? Rush from $3,088.
Scan for this in your stack
Free · runs locallyCheck whether your project pulls in CVE-2021-26607 — 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-2021-26607 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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