CVE-2026-12621
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 · uneditedImproper neutralization of input during web page generation XSS vulnerability in the GridTime 3000 (password reset form) allows XSS. This issue affects GridTime 3000: from 1.0r0.03 before 1.2r0.0.
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 · moderate confidenceReflected XSS vulnerability in GridTime 3000 password reset form where user-supplied input is not properly sanitized before being rendered in the web page, allowing attackers to inject malicious scripts.
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>= 1.0r0.03, < 1.2r0.0CVSS 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
- Low
- User interaction
- Required
- Scope
- Changed
- Confidentiality
- Low
- Integrity
- Low
- Availability
- None
CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:L/I:L/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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Check GridTime firmware versionAccess the device web interface or check the firmware version via SNMP or administrative console. Look for the version information typically displayed in the system status or about page.Affected if Installed version is greater than or equal to 1.0r0.03 AND less than 1.2r0.0
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Verify password reset form is accessibleNavigate to the password reset or password recovery endpoint on the GridTime 3000 web interface. This is typically found at /password_reset, /forgot_password, or similar path depending on the application.Affected if The password reset form is exposed and accessible without authentication
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Identify vulnerable input parametersSubmit a test payload in the password reset form fields (such as username or email) and capture the HTTP response. Common vulnerable parameters include 'username', 'email', 'user', or 'token' fields.Affected if The submitted input is reflected back in the response without proper sanitization or encoding
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Confirm XSS vulnerability via response inspectionUse a browser developer tool or HTTP proxy to examine the HTML source of the password reset response page. Check if special characters like <, >, " are rendered as plain text or properly encoded.Affected if User-supplied input appears unescaped in the HTML response, allowing script injection
A user is affected if their GridTime 3000 firmware version falls within 1.0r0.03 to 1.2r0.0 (exclusive) and the password reset form reflects unsanitized user input in the response page.
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 · scoped1.2r0.0
Upgrade to GridTime 3000 version 1.2r0.0 or later which contains the fix; implement server-side input validation and output encoding on the password reset form as an interim mitigation.
GridTime 3000 firmware version 1.2r0.0 or later
- Obtain GridTime 3000 firmware version 1.2r0.0 or later from the official Microchip vendor source
- Follow Microchip's documented firmware update procedure to apply the new firmware version to the GridTime 3000 device
- After updating, verify the firmware version has been correctly applied and the device is functioning properly
Generated from the published advisory — verify against the referenced sources before acting.
- Consultation2.0 h
- Implementation4.0 h
- Testing2.0 h
- Review / QA1.0 h
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Scan for this in your stack
Free · runs locallyCheck whether your project pulls in CVE-2026-12621 — 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-2026-12621 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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- Version or environment caveats, and links to real fixes
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