Quick answers
- Is CVE-2026-20326 exploited in the wild?
- No. Junglewise Threat Intelligence has no report of CVE-2026-20326 being exploited in the wild.
- How severe is CVE-2026-20326?
- Critical severity, with a CVSS score of 9.8, published 16 September 2026.
- Which products and versions are affected?
- Cisco Nexus Dashboard 4.2 and earlier.
- Is there a fix for CVE-2026-20326?
- A patch was published on 2026-09-16: Fixed release 4.3.1.175 available Junglewise finds every place you run it, drafts the upgrade and applies it once you approve.
- How is CVE-2026-20326 attacked?
- It is attacked over the network, in a network appliance.
- Am I affected by CVE-2026-20326?
- Check whether you run Cisco Nexus Dashboard at an affected version. Junglewise does that check for you around the clock: connect your code, cloud and domains, and it matches new vulnerabilities like this one against what you actually run and tells you when one reaches you.
Technical details
CVE-2026-20326 is a missing authentication vulnerability (CWE-306) in Cisco Nexus Dashboard affecting versions 4.2 and earlier. The vulnerability allows an attacker with network access to invoke critical functions without proper authentication verification, potentially bypassing security controls. The root cause stems from insufficient authentication checks on sensitive operations during an internal security hardening review. An authenticated or unauthenticated remote attacker can exploit this over the network to gain unauthorized access to critical functions. Cisco has released fixed versions (4.3.1.175 for the 4.3 branch) and strongly recommends customers upgrade immediately; no workarounds exist.
Affected products
- Cisco Nexus Dashboard 4.2 and earlier
Timeline
- 2026-09-16: disclosed
- 2026-09-16: patched: Fixed release 4.3.1.175 available