CVE-2020-7508
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 · uneditedA CWE-307 Improper Restriction of Excessive Authentication Attempts vulnerability exists in Easergy T300 (Firmware version 1.5.2 and older) which could allow an attacker to gain full access by brute force.
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 Easergy T300 firmware versions 1.5.2 and older suffer from CWE-307 Improper Restriction of Excessive Authentication Attempts, allowing attackers to perform unlimited login attempts without any lockout, throttling, or rate limiting. Attackers can brute force credentials to gain full administrative access to the device, which manages electrical distribution infrastructure.
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<= 1.5.2CVSS 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
- 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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Confirm Easergy T300 device modelIdentify the device on the network or physically - look for Schneider Electric Easergy T300 labeling or check the device's web interface for the model nameAffected if Device is not an Easergy T300 unit
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Check firmware versionAccess the device web interface (usually via HTTP/HTTPS) and navigate to the About or System Information page to view the firmware version, or use SNMP to query the device firmware versionAffected if Firmware version is 1.5.2 or lower (e.g., 1.5.2, 1.5.1, 1.5.0, etc.)
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Verify login interface is network-accessibleConfirm the device's web-based login portal or authentication service is reachable on the network (typically ports 80, 443, or custom HTTP/HTTPS ports)Affected if The login interface is exposed on the network and responds to authentication requests
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Test for account lockout or rate limitingAttempt multiple consecutive failed login attempts (e.g., 10-20 failed attempts) using invalid credentials and observe whether the device imposes any lockout, delay, or throttlingAffected if No lockout occurs after repeated failed attempts - the device accepts unlimited authentication attempts without blocking or delaying
The environment is affected if an Easergy T300 device is running firmware version 1.5.2 or older and its login interface is network-accessible, as the device lacks brute force protection.
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 · scopedApply vendor firmware updates beyond version 1.5.2 when available, and implement network segmentation and monitoring to detect brute force patterns until the patch can be deployed.
Any Easergy T300 firmware version newer than 1.5.2 (contact Schneider Electric for the specific latest stable release)
- Contact Schneider Electric technical support or visit the official Schneider Electric website to obtain the latest Easergy T300 firmware version
- Download the firmware update from an official Schneider Electric source
- Follow Schneider Electric's documented firmware upgrade procedure for Easergy T300
- After upgrading, verify that the authentication mechanism now properly restricts excessive authentication attempts
- Confirm the firmware version has been updated to a version newer than 1.5.2
Generated from the published advisory — verify against the referenced sources before acting.
- Consultation4.0 h
- Implementation4.0 h
- Testing8.0 h
- Review / QA4.0 h
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Scan for this in your stack
Free · runs locallyCheck whether your project pulls in CVE-2020-7508 — 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-2020-7508 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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