Unauthenticated access to critical functions in Cisco Crosswork (network orchestration). High-impact on network operations and service providers; could cause widespread outages and is newsworthy.
CVE-2026-20357
Unauthenticated access to critical Cisco Crosswork functions enabling major network compromise.
Is CVE-2026-20357 being exploited?
Not confirmed. CVE-2026-20357 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 0.55% probability of exploitation in the next 30 days.
How severe is CVE-2026-20357?
CVE-2026-20357 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-2026-20357?
Yes. A fix has been recorded for CVE-2026-20357. The vendor advisory is the authority on the exact fixed version — apply it from there rather than from a summary.
What does CVE-2026-20357 affect?
CVE-2026-20357 affects Cisco Crosswork. Confirm the exact affected versions against the vendor advisory before deciding you are exposed.
What should I do about CVE-2026-20357?
Apply the 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.
Unauthenticated attackers can bypass authentication to invoke critical Crosswork functions, modify configs, disrupt services, or execute commands.
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.