Ios XeOperating system · Cisco
CVE-2020-3474
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 · uneditedMultiple vulnerabilities in the web management framework of Cisco IOS XE Software could allow an authenticated, remote attacker with read-only privileges to gain unauthorized read access to sensitive data or cause the web management software to hang or crash, resulting in a denial of service (DoS) condition. For more information about these vulnerabilities, see the Details section of this advisory.
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 confidenceMultiple vulnerabilities in the web management framework of Cisco IOS XE Software allow an authenticated attacker with read-only privileges to gain unauthorized read access to sensitive data or cause the web management interface to hang or crash, resulting in denial of service.
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
Ios XeOperating system
all versionsCVSS 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
- None
- Scope
- Unchanged
- Confidentiality
- High
- Integrity
- None
- Availability
- High
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/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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Confirm the device runs Cisco IOS XE SoftwareRun 'show version' and look for 'IOS XE' in the software identifierAffected if The device runs any version of Cisco IOS XE (not classic IOS)
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Determine if the HTTP web management interface is enabledRun 'show running-config | include ip http server' or check the configuration for 'ip http server' or 'ip http secure server' statementsAffected if Either HTTP (port 80) or HTTPS (port 443) web management is enabled in the configuration
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Verify authentication is configured for web managementRun 'show running-config | include username' to list local user accounts, or check AAA configuration with 'show running-config | include aaa'Affected if Any user accounts exist that could provide authenticated access to the web interface (even read-only accounts)
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Check for read-only privilege usersRun 'show privilege' or review user privilege levels via 'show running-config | include username' to identify users with privilege level 1-3 (read-only)Affected if Any read-only or low-privilege user accounts (privilege 1-3) are configured on the device
The device is affected if it runs Cisco IOS XE with the web management interface (HTTP/HTTPS) enabled and has any authenticated user accounts present, regardless of privilege level.
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 dataApply Cisco IOS XE software patches when available; restrict web management interface access to trusted networks and limit user privileges to minimum required.
Fix this in Ios Xe
Scoped from the published advisory
- Consultation4.0 h
- Implementation6.0 h
- Testing8.0 h
- Review / QA4.0 h
An estimate, not a bill — we confirm scope with you before any work starts. Need it this week? Rush from $6,080.
Scan for this in your stack
Free · runs locallyCheck whether your project pulls in CVE-2020-3474 — 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-2020-3474 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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