CVE-2026-20358Network attack vector

File overwrite or deletion via path control

Published Aug 19, 2026 · Updated Aug 19, 2026

Path handling flaws in Cisco Crosswork Planning 7.0.0 through 7.2.0 allow remote attackers to alter files on affected systems via unspecified vectors. Cisco has disclosed only that the affected code performs file-system operations with externally controlled path input; no endpoint, function, or validation failure has been published. Cisco scored the most severe underlying issue as network-reachable with no privileges or user interaction and with integrity and availability impact, so exposed Planning deployments warrant urgent triage even though no public exploitation is known.

CVSS severity10.0
Critical
EPSS probability0.46%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Path handling flaws in Cisco Crosswork Planning 7.0.0 through 7.2.0 allow remote attackers to alter files on affected systems via unspecified vectors. Cisco has disclosed only that the affected code performs file-system operations with externally controlled path input; no endpoint, function, or validation failure has been published. Cisco scored the most severe underlying issue as network-reachable with no privileges or user interaction and with integrity and availability impact, so exposed Planning deployments warrant urgent triage even though no public exploitation is known.

The record

CVE
CVE-2026-20358
Published
Aug 19, 2026
Updated
Aug 19, 2026
Vendor
ClamAV
Product
Cisco Crosswork Planning
Classifications
CWE-73
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Aug 19, 2026CVE publishedPublication date reported by the CVE source.
  2. Aug 19, 2026Record 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=7.0.0
  2. Affected versionversion=7.0.1
  3. Affected versionversion=7.0.2
  4. Affected versionversion=7.0.3
  5. Affected versionversion=7.0.4
  6. Affected versionversion=7.1.0
  7. Affected versionversion=7.1.1
  8. Affected versionversion=7.1.2
  9. Affected versionversion=7.2.0

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

ClamAV · Cisco Crosswork Planningversion=7.0.0; version=7.0.1; version=7.0.2; version=7.0.3; version=7.0.4; version=7.1.0; version=7.1.1; version=7.1.2; version=7.2.0

Published CVSS scores

10.0Cisco Systems, Inc.CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:N/I:H/A:H

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

Weakness, pattern, technique

CWE-73External Control of File Name or Path

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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