CVE-2018-16496Network attack vector

Unauthenticated log-level modification via unprotected request

Published May 26, 2021 · Updated Aug 5, 2024

Improper authentication in Versa Director allows remote attackers to change the application's logging level through an unauthenticated request. The public disclosure identifies the affected operation only as a log-level change and does not reveal the endpoint or missing validation check. No account is required; the demonstrated consequence is limited to modifying logging verbosity, with no published evidence of broader access.

CVSS severity5.3
Medium
EPSS probability0.74%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Improper authentication in Versa Director allows remote attackers to change the application's logging level through an unauthenticated request. The public disclosure identifies the affected operation only as a log-level change and does not reveal the endpoint or missing validation check. No account is required; the demonstrated consequence is limited to modifying logging verbosity, with no published evidence of broader access.

The record

CVE
CVE-2018-16496
Published
May 26, 2021
Updated
Aug 5, 2024
Vendor
Versa Networks
Product
Versa Director
Classifications
CWE-287, T1562.001
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. May 26, 2021CVE publishedPublication date reported by the CVE source.
  2. Aug 5, 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=Fixed Versions: 16.1R2S11, 20.2.2, 21.1.1, 21.2.1

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

Versa Networks · Versa Directorversion=Fixed Versions: 16.1R2S11, 20.2.2, 21.1.1, 21.2.1

Published CVSS scores

5.3NIST NVDCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:N
5.0NIST NVDAV:N/AC:L/Au:N/C:N/I:P/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.

Daily unique IPsNo honeypot observations are available for this CVE in the selected window.

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-287Improper Authentication
T1562.001Impair Defenses: Disable or Modify Tools

Public exploit references

No public exploit references are available in this record.

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Technologies

Your stack

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Your stack

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