Unity ConnectionApplication · Cisco
CVE-2026-20078
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 Cisco Unity Connection could allow an authenticated, remote attacker to download arbitrary files from an affected system. To exploit these vulnerabilities, the attacker must have valid administrative credentials. These vulnerabilities are due to improper sanitization of user input to the web-based management interface. An attacker could exploit these vulnerabilities by sending a crafted HTTPS request. A successful exploit could allow the attacker to download arbitrary files from an affected system.
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 confidenceCisco Unity Connection contains multiple path traversal vulnerabilities in its web-based management interface. Authenticated attackers with valid administrative credentials can send crafted HTTPS requests containing unsanitized user input to download arbitrary files from the underlying filesystem. The CVSS 6.5 indicates a medium-severity issue requiring authentication but allowing broad file disclosure.
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
Unity ConnectionApplication
<= 12.5= 14.0= 14su1= 14su2= 14su3= 14su3a= 14su4= 14su5= 15.0= 15su1= 15su2= 15su3CVSS 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
- None
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:N/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 if Cisco Unity Connection is installedLocate the Cisco Unity Connection installation on your system or check the product list of network appliances managed by your organization.Affected if The product is present in your environment.
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Determine the installed version of Cisco Unity ConnectionUse the product's administrative interface, CLI, or system information tools to retrieve the exact version number of Unity Connection.Affected if The version matches any of these: 12.5 or earlier, 14.0, 14su1, 14su2, 14su3, 14su3a, 14su4, 14su5, 15.0, 15su1, 15su2, or 15su3.
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Confirm the web-based management interface is accessibleVerify that HTTPS access to the Unity Connection administration portal is enabled and reachable on the network.Affected if The web management interface is exposed and accessible.
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Verify administrative user accounts existCheck if administrative accounts with privileges to access the Unity Connection management interface are configured in the system.Affected if Valid administrative credentials can be used to authenticate to the web interface.
You are affected if Cisco Unity Connection is installed, the version matches any of the affected versions listed, the web management interface is accessible, and administrative accounts exist that could be used to send the malicious HTTPS requests.
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 the vendor-provided security updates/patches from Cisco for Unity Connection. Until patched, limit administrative access to trusted personnel and monitor for suspicious HTTPS requests to the management interface.
Fix this in Unity Connection
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-2026-20078 — 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-2026-20078 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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A place for practitioners to share what actually worked: a mitigation you’ve tested, a configuration change, a version- or environment-specific caveat, or a link to a verified patch. The most useful notes rise to the top as peers upvote them, so the signal stays high.
- 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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