CVE-2021-1255Network attack vector

Authenticated file listing and overwrite via path traversal

Published Jan 20, 2021 · Updated Nov 12, 2024

Path traversal in Cisco Data Center Network Manager before 11.4(1) allows remote authenticated users to list or overwrite arbitrary files. A REST API endpoint fails to enforce path restrictions on paths supplied in crafted HTTP requests. Exploitation requires low privileges and user interaction, and the documented effects are limited to file listing and overwrite.

CVSS severity4.6
Medium
EPSS probability0.67%
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 Cisco Data Center Network Manager before 11.4(1) allows remote authenticated users to list or overwrite arbitrary files. A REST API endpoint fails to enforce path restrictions on paths supplied in crafted HTTP requests. Exploitation requires low privileges and user interaction, and the documented effects are limited to file listing and overwrite.

The record

CVE
CVE-2021-1255
Published
Jan 20, 2021
Updated
Nov 12, 2024
Vendor
ClamAV
Product
Cisco Data Center Network Manager
Classifications
CWE-184, T1083, T1565.001
Attack vector
network
Privileges
authenticated

Timeline

How it unfolded

  1. Jan 20, 2021CVE publishedPublication date reported by the CVE source.
  2. Nov 12, 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?

Compare these published version ranges with your installed build and any vendor patches.

  1. Affected versionversion=n/a

What conditions does exploitation require?

Attack vectornetwork
Required privilegesauthenticated

What is affected?

ClamAV · Cisco Data Center Network Managerversion=n/a

Published CVSS scores

4.6CiscoCVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:U/C:L/I:L/A:N

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 10, 2026Sep 16, 2026
Latest reporting daySep 16, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-184Incomplete List of Disallowed Inputs
T1083File and Directory Discovery
T1565.001Stored Data Manipulation

Public exploit references

No public exploit references are available in this record.

Labels summarize the accepted research assessment. They do not indicate a test against your environment.

Technologies

Your stack

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Your stack

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