CVE-2020-5826
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 · uneditedSymantec Endpoint Protection (SEP) and Symantec Endpoint Protection Small Business Edition (SEP SBE), prior to 14.2 RU2 MP1 and prior to 14.2.5569.2100 respectively, may be susceptible to an out of bounds vulnerability, which is a type of issue that results in an existing application reading memory outside of the bounds of the memory that had been allocated to the program.
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 confidenceThis is an out-of-bounds read vulnerability in Symantec Endpoint Protection and SEP Small Business Edition versions prior to 14.2 RU2 MP1 and 14.2.5569.2100 respectively. The vulnerability allows the application to read memory outside allocated buffer boundaries, potentially leaking sensitive information from the program's memory space.
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= 11.0= 12.1= 14.0.0= 14.0.1= 14.2= 12.0CVSS 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
- Local
- Complexity
- Low
- Privileges
- Low
- User interaction
- None
- Scope
- Unchanged
- Confidentiality
- None
- Integrity
- None
- Availability
- High
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/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 the installed version of Symantec Endpoint ProtectionOpen the Symantec Endpoint Protection client, go to Help > About Symantec Endpoint Protection, or run 'smc -version' from the command line to display the installed version numberAffected if The displayed version matches one of the affected versions: 11.0, 12.0, 12.1, 14.0.0, 14.0.1, or 14.2 (or versions prior to 14.2.5569.2100 for SEP Small Business Edition)
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Confirm the product variantVerify whether the installation is standard Symantec Endpoint Protection or SEP Small Business Edition, as each has different version numbering schemesAffected if Running SEP Small Business Edition with version lower than 14.2.5569.2100, or standard SEP with version 14.2 or earlier
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Verify the application is activeCheck that the Symantec Endpoint Protection service or client is running on the systemAffected if The application is installed and running a version within the affected ranges
A system is affected if Symantec Endpoint Protection version is 11.0, 12.0, 12.1, 14.0.0, 14.0.1, 14.2, or SEP Small Business Edition version is below 14.2.5569.2100.
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.
From vendor dataUpgrade Symantec Endpoint Protection to version 14.2 RU2 MP1 or later (14.2.5569.2100 or later for SEP SBE) to remediate this vulnerability.
- Consultation1.0 h
- Implementation2.0 h
- Testing2.0 h
- Review / QA1.0 h
An estimate, not a bill — we confirm scope with you before any work starts. Need it this week? Rush from $1,664.
Scan for this in your stack
Free · runs locallyCheck whether your project pulls in CVE-2020-5826 — 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-2020-5826 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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