EUVD-2026-38039
GHSA-h3jc-pwm8-8fvh
Severity by source
CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:L/VI:L/VA:N/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X
Network-accessible endpoint requires low-privilege session (PR:L); redirect to external site constitutes scope change (S:C); limited phishing-driven confidentiality and integrity impact (C:L/I:L); no availability impact.
Primary rating from Vendor (Microchip).
CVSS VectorVendor: Microchip
CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:L/VI:L/VA:N/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X
Lifecycle Timeline
1DescriptionCVE.org
The GridTime 3000 GNSS Time Server has an open redirect vulnerability in the password change form submission.
This issue affects GridTime 3000: from 1.0r0.03 through 1.1r0.0.
AnalysisAI
Open redirect in Microchip's GridTime 3000 GNSS Time Server allows authenticated low-privilege users to manipulate the post-submission redirect destination of the password change form, enabling phishing and credential harvesting attacks against administrators. All firmware versions from 1.0r0.03 through 1.1r0.0 are confirmed affected per vendor self-disclosure. …
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Attack ChainAIDerived
Hypothetical attack flow derived from CVE metadata
Vulnerability AssessmentAI
| Exploitation | Exploitation requires a valid low-privilege authenticated session on the GridTime 3000 web management interface, as confirmed by the CVSS 4.0 PR:L metric - unauthenticated remote attackers cannot exploit this directly. … Additional conditions and limiting factors are described in the full assessment. |
| Risk Assessment | The vendor-assigned CVSS 4.0 score of 5.3 (Medium) accurately reflects the constrained impact: limited confidentiality and integrity effects (VC:L/VI:L) with no availability impact (VA:N/SC:N/SI:N/SA:N). … Full risk analysis with EPSS, KEV, and SSVC signal comparison available after sign-in. |
| Exploit Scenario | An attacker with low-privilege credentials to the GridTime 3000 management interface crafts a password change form submission URL embedding a malicious redirect parameter pointing to an attacker-controlled site mimicking the device login page. After the form is submitted, the server issues a redirect to the attacker's site, where the victim administrator's credentials are harvested. … |
| Remediation | Consult the Microchip security advisory at https://www.microchip.com/en-us/solutions/technologies/embedded-security/how-to-report-potential-product-security-vulnerabilities/gridtime-3000-gnss-time-server-open-redirect to obtain the patched firmware version - an exact fixed firmware version number is not independently confirmed from the available data and must be verified directly with Microchip. … Detailed patch versions, workarounds, and compensating controls in full report. |
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