Critical CVSS 10.0 in Cisco Crosswork (widely used network automation); file-system control bug can broadly impact infrastructure and operations.
CVE-2026-20358
Critical Cisco Crosswork file-system control flaw allows arbitrary file access.
Is CVE-2026-20358 being exploited?
Not confirmed. CVE-2026-20358 does not appear in CISA's Known Exploited Vulnerabilities catalog, which records only exploitation that has been observed and reported publicly. That is evidence of absence of a report, not evidence the flaw is unattacked. EPSS currently estimates a 0.46% probability of exploitation in the next 30 days.
How severe is CVE-2026-20358?
CVE-2026-20358 is rated Critical with a CVSS score of 10.0. Severity describes how bad exploitation would be, not how likely it is: pair it with exploitation evidence before deciding what to patch first.
Is there a patch for CVE-2026-20358?
Yes. A fix has been recorded for CVE-2026-20358. The vendor advisory is the authority on the exact fixed version — apply it from there rather than from a summary.
What does CVE-2026-20358 affect?
CVE-2026-20358 affects Cisco Crosswork (network automation). Confirm the exact affected versions against the vendor advisory before deciding you are exposed.
What should I do about CVE-2026-20358?
Install Cisco Crosswork security update immediately; restrict access and monitor logs.
Exploitation status reflects CISA's KEV catalog as we last synced it. Check the catalog directly.
Remote attackers can read/write arbitrary files, tamper configs, exfiltrate data, and potentially achieve code execution or disrupt services.
Immediate action required
- affected7.0.2
- affected7.1.0
- affected7.0.0
- affected7.0.4
- affected7.0.1
- affected7.0.3
- affected7.2.0
- affected7.1.1
- affected7.1.2
As published in the CVE Program record. A version outside these ranges is not a statement that it is unaffected — vendors sometimes understate a range, and distribution-backported builds carry upstream numbers that do not reflect what was patched into them.