Wide Area Application ServicesApplication · Cisco
CVE-2019-1876
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 vulnerability in the HTTPS proxy feature of Cisco Wide Area Application Services (WAAS) Software could allow an unauthenticated, remote attacker to use the Central Manager as an HTTPS proxy. The vulnerability is due to insufficient authentication of proxy connection requests. An attacker could exploit this vulnerability by sending a malicious HTTPS CONNECT message to the Central Manager. A successful exploit could allow the attacker to access public internet resources that would normally be blocked by corporate policies.
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 HTTPS proxy feature in Cisco WAAS Central Manager lacks proper authentication, allowing unauthenticated remote attackers to send malicious HTTPS CONNECT messages and use the Central Manager as an open proxy to access public internet resources, bypassing corporate security policies.
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
Wide Area Application ServicesApplication
= 5.5\(7\)= 6.1\(1\)= 6.4\(3b\)CVSS 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
- None
- Integrity
- Low
- Availability
- None
CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/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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Identify WAAS Central Manager installationLocate the Cisco WAAS Central Manager in your environment - this is typically a dedicated management interface for Cisco Wide Area Application Services appliancesAffected if WAAS Central Manager software is present on any system in the network
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Determine installed WAAS versionAccess the WAAS Central Manager admin interface or use the command line interface to retrieve the software version informationAffected if The installed version matches 5.5.7, 6.1.1, or 6.4.3b exactly
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Verify HTTPS proxy feature statusCheck the WAAS Central Manager configuration for the HTTPS proxy feature - this is typically found in the proxy or forwarding settings of the management consoleAffected if The HTTPS proxy feature is enabled in the Central Manager configuration
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Inspect proxy authentication settingsExamine the HTTPS proxy configuration to determine whether authentication is required or enforced for incoming proxy requestsAffected if Authentication is not required, not enforced, or is improperly configured for the HTTPS proxy feature
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Review proxy access control configurationCheck the proxy access control lists or allowed destination settings to determine if restrictions are in place for proxy connectionsAffected if The proxy allows unrestricted access to external resources without proper access controls
You are affected if WAAS Central Manager is running version 5.5.7, 6.1.1, or 6.4.3b AND the HTTPS proxy feature is enabled without proper authentication or access controls.
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 dataDisable the HTTPS proxy feature in WAAS Central Manager if not required, or implement proper authentication and access controls for proxy connections; apply Cisco patches when available.
Fix this in Wide Area Application Services
Scoped from the published advisory
- Consultation3.0 h
- Implementation4.0 h
- Testing3.0 h
- Review / QA2.0 h
An estimate, not a bill — we confirm scope with you before any work starts. Need it this week? Rush from $3,408.
Scan for this in your stack
Free · runs locallyCheck whether your project pulls in CVE-2019-1876 — 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-2019-1876 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
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