CVE-2020-3177Network attack vector

Arbitrary file read via TAPS path traversal

Published Apr 15, 2020 · Updated Nov 15, 2024

Path traversal in TAPS in Cisco Unified Communications Manager allows remote attackers to read arbitrary system files through crafted requests. The TAPS interface fails to validate user-supplied path input before resolving requested files, allowing traversal outside the intended directory. Exploitation requires network access to a server with auto-registration enabled, which Cisco states is disabled by default, and exposes file contents without modifying them.

CVSS severity7.5
High
EPSS probability2.80%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Path traversal in TAPS in Cisco Unified Communications Manager allows remote attackers to read arbitrary system files through crafted requests. The TAPS interface fails to validate user-supplied path input before resolving requested files, allowing traversal outside the intended directory. Exploitation requires network access to a server with auto-registration enabled, which Cisco states is disabled by default, and exposes file contents without modifying them.

The record

CVE
CVE-2020-3177
Published
Apr 15, 2020
Updated
Nov 15, 2024
Vendor
ClamAV
Product
Cisco Unified Communications Manager
Classifications
CWE-22, T1005
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Apr 15, 2020CVE publishedPublication date reported by the CVE source.
  2. Nov 15, 2024Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

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Is a vulnerable build present?

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  1. Affected versionversion=n/a

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

ClamAV · Cisco Unified Communications Managerversion=n/a

Published CVSS scores

7.5Cisco Systems, Inc.CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N/E:X/RL:X/RC:X

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.

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No observations available

Sep 9, 2026Sep 15, 2026
Latest reporting daySep 15, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-22Improper Limitation of a Pathname to a Restricted Directory ('Path Traversal')
T1005Data from Local System

Public exploit references

No public exploit references are available in this record.

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Technologies

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Your stack

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