Security readout for executives and security teams
Plain-English summary
Cisco Crosswork Planning contains critical functions that may be reachable without authentication. A remote, unauthenticated attacker could potentially compromise sensitive information, alter systems, or disrupt service. The supplied record rates this CVSS 10.0, but provides limited technical detail.
Executive priority
Treat as an immediate remediation priority because the supplied assessment is CVSS 10.0 and requires no authentication. Prioritize externally reachable or broadly accessible management interfaces, while confirming upgrade requirements directly with Cisco.
Technical view
CVE-2026-20357 groups internally discovered missing-authentication issues classified as CWE-306. The CVSS 3.1 vector indicates network reachability, low complexity, no privileges or user interaction, changed scope, and high confidentiality, integrity, and availability impact.
Likely exposure
Cisco Crosswork Planning versions 7.0.0 through 7.0.4, 7.1.0 through 7.1.2, and 7.2.0 are listed. Risk is greatest where management interfaces are reachable from untrusted networks. Default status is unknown.
Exploitation context
The supplied record does not identify public exploitation, and CVE-2026-20357 is not listed as KEV in the bundle. Cisco reports internal discovery. Absence from KEV does not establish that exploitation is impossible.
Researcher notes
Public details in the bundle do not identify affected endpoints, protocol specifics, fixed versions, indicators, or proof-of-concept availability. Validation should remain non-invasive and focus on versioning, reachability, access controls, and vendor guidance.
Mitigation direction
- Inventory Cisco Crosswork Planning deployments and identify listed versions.
- Review Cisco's advisory for fixed releases and upgrade instructions.
- Restrict management interfaces to trusted administrative networks and authorized users.
- Apply monitoring or compensating controls where upgrades cannot be completed immediately.
Validation and detection
- Confirm each deployment's exact product version against the affected list.
- Verify the installed release against Cisco's current advisory guidance.
- Review exposure paths, firewall rules, proxies, and administrative access controls.
- Examine relevant logs for unexplained unauthenticated access or configuration changes.
Public sources used
Generated from the cited source records. This long-tail analysis has not been individually reviewed by a named human.
Conservative CVE-to-ATT&CK context
These mappings and lookup hints may be relevant to the vulnerability behavior, CWE, affected product, or exposure path. Glexia-inferred context is not an official MITRE, ATT&CK, CWE, or CVE Program mapping.
ATT&CK lookup starting points
Use these exact CWE pages and searches to review the Glexia ATT&CK library from this CVE's weakness and description context.
CWE-306: Credential and account abuse lookup
Authentication and credential weaknesses can make valid-account abuse and credential telemetry useful review starting points. Open the exact CWE lookup page first, then review the ATT&CK searches from that MITRE weakness context. This is a Glexia lookup hint, not an official ATT&CK mapping.
Open ATT&CK lookupCVE-2026-20357 mapping review
Open the CVE-to-ATT&CK bridge for reviewed, inferred, or future official mappings tied to this CVE.
Open ATT&CK lookup- Severity
- Critical
- CVSS
- 10 (3.1)
- Known Exploited
- No
- Published
Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:H
CNA and ADP enrichment extracted from CVE v5
These fields come from the CVE record and ADP containers, not from Glexia's Take. They preserve time-varying source decisions such as CISA SSVC, KEV status, CVSS metrics, and provider references.
SSVC decision data
CVSS vector scores
1 official scoreWe collect every scored CVSS vector available in the official CNA and ADP containers. When more than one version is present, the table keeps the source vectors side by side instead of collapsing them into the highest score.
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:H3.96ciscoVulnerability scoring details
Base CVSS 3.1 score
10CriticalVector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:H
Vulnerability timeline
Timeline events are normalized from CVE metadata, CNA source timelines, ADP timelines, and KEV metadata when present.
- CVE reservedCVE Program
The CVE ID was reserved by the assigning CNA.
- CVE publishedCVE Program
The CVE record was published.
- CVE updatedCVE Program
The CVE record metadata indicates this as the latest update time.
ADP provider summaries
Source materials
- CVE List V5 sourceCVE List V5
- cisco-sa-hardening-crosswork-UzDTU9VhCVE reference, cisco
- https://www.cve.org/Media/News/item/blog/2026/06/16/Preserving-Vulnerability-Level-IdentificationCVE reference, CVE
Products and packages named in the record
CWE details
CWE links open Glexia weakness intelligence pages with official CWE context, developer remediation guidance, and related CVE mappings.
Missing Authentication for Critical Functionality
Missing Authentication for Critical Functionality represents a recurring weakness pattern that can create exploitable paths when design, validation, or implementation controls are missing.