# CVE-2026-20319: Cisco Secure Workload buffer management issue

Source: https://junglewise.ai/threats/cve-2026-20319-cisco-secure-workload-buffer-management-issue  
Publisher: Junglewise Threat Intelligence, https://junglewise.ai/threats  
Published: 2026-08-19. Updated: 2026-09-25  
License: CC BY 4.0 with a link back

CVE-2026-20319 · Severity: high · CVSS 7.5 · Published 2026-08-19

Cisco Secure Workload is a cloud security platform used to protect and monitor containerized applications. This release addresses buffer management vulnerabilities that could allow an attacker with network access to cause a denial of service or potentially execute arbitrary code. The vulnerabilities were discovered internally and there is no evidence of active exploitation.

Technologies: [Cisco Secure Workload](https://junglewise.ai/threats/technologies/secure-workload). Vendors: [Cisco](https://junglewise.ai/threats/vendors/cisco).

## Quick answers

**Is CVE-2026-20319 exploited in the wild?** No. Junglewise Threat Intelligence has no report of CVE-2026-20319 being exploited in the wild.

**How severe is CVE-2026-20319?** High severity, with a CVSS score of 7.5, published 19 August 2026.

**Which products and versions are affected?** Cisco Secure Workload 3.10 and earlier, 4.0.

**Is there a fix for CVE-2026-20319?** A patch was published on 2026-08-19: Fixed versions released: 3.10.9.1 and 4.0.4.16 Junglewise finds every place you run it, drafts the upgrade and applies it once you approve.

**How is CVE-2026-20319 attacked?** It is attacked over the network.

**Am I affected by CVE-2026-20319?** Check whether you run Cisco Secure Workload 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-2026-20319 is a buffer management issue classified under CWE-119, involving improper restriction of operations within the bounds of a memory buffer. The vulnerability affects Cisco Secure Workload in both SaaS and on-premises deployments, and is remotely exploitable over the network without requiring authentication or user interaction (CVSS vector: AV:N/AC:L/PR:N/UI:N). An attacker can achieve denial of service or arbitrary code execution depending on the specific underlying vulnerability. Cisco has released patched versions (3.10.9.1 for releases 3.10 and earlier, and 4.0.4.16 for release 4.0) and recommends customers upgrade the Cluster, Agent, and Connector software components.

## Affected products

- Cisco Secure Workload 3.10 and earlier, 4.0

## Timeline

- 2026-08-19: disclosed: Cisco advisory published for CVE-2026-20319 and related vulnerabilities
- 2026-08-19: patched: Fixed versions released: 3.10.9.1 and 4.0.4.16

## References

- [https://sec.cloudapps.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-hardening-csw1-shSvndWP](https://sec.cloudapps.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-hardening-csw1-shSvndWP)
- [https://www.cve.org/Media/News/item/blog/2026/06/16/Preserving-Vulnerability-Level-Identification](https://www.cve.org/Media/News/item/blog/2026/06/16/Preserving-Vulnerability-Level-Identification)

## Related threats

- [Cisco Secure Workload improper input validation](https://junglewise.ai/threats/cve-2026-20318-cisco-secure-workload-improper-input-validation)
- [Cisco Secure Workload authentication bypass](https://junglewise.ai/threats/cve-2026-20317-cisco-secure-workload-authentication-bypass)
- [Cisco Secure Workload improper access control](https://junglewise.ai/threats/cve-2026-20315-cisco-secure-workload-improper-access-control)
- [Cisco Secure Workload improper neutralization of special elements](https://junglewise.ai/threats/cve-2026-20231-cisco-secure-workload-improper-neutralization-of-special-elements)