Cisco Unified Communications Manager SSRF Flaw Routes Attacker Requests to Internal Resources; CISA's June 28th KEV Deadline for Covered Entities Has Lapsed

Last refreshed2026-09-27

Status: KEV | Advisory ID: CVE-2026-20230

Key Details

CVE	CVE-2026-20230
Vulnerability Name	Cisco Unified Communications Manager Server-Side Request Forgery (SSRF) Vulnerability
Affected products	Cisco Unified Communications Manager
Exploitation status	Listed in CISA's Known Exploited Vulnerabilities (KEV) catalog, indicating confirmed active exploitation.
Classified as	CWE-918 (Server-Side Request Forgery (SSRF))
KEV listing	Added to CISA's Known Exploited Vulnerabilities (KEV) catalog on 2026-06-25.
Exploitation prediction (EPSS)	88.20% probability of exploitation in the next 30 days (100% percentile) -- FIRST.org's EPSS model.
Federal remediation deadline	2026-06-28 (CISA KEV, Binding Operational Directive).

Affected Products, Subsystems & Sectors

Vendor	Product	Affected Versions	Patch Status
Cisco	Unified Communications Manager

Vendor

Product

Affected Versions

Patch Status

Cisco

Unified Communications Manager

Subsystems	Industrial Network - Routers/Firewalls
Sectors	Multiple

What to Know

Cisco Unified Communications Manager (Unified CM) and Cisco Unified Communications Manager Session Management Edition (Unified CM SME) contain a server-side request forgery (SSRF) Vulnerability that could allow an unauthenticated, remote attacker to write files to the underlying operating system that could be used later to elevate to root.

What to Do

Monitor Cisco's web page for any future patch releases.

References

Source	Reference
NVD	https://nvd.nist.gov/vuln/detail/CVE-2026-20230
CVE	https://www.cve.org/CVERecord?id=CVE-2026-20230

Source

Reference

NVD

https://nvd.nist.gov/vuln/detail/CVE-2026-20230

CVE

https://www.cve.org/CVERecord?id=CVE-2026-20230

KEV Required Action

Field	Value
KEV Link	https://www.cisa.gov/known-exploited-vulnerabilities-catalog
Date Added to KEV	2026-06-25
Required Action Due Date	2026-06-28
Required Action	Apply mitigations in accordance with vendor instructions, ensuring compliance with CISA’s BOD 26-04 Prioritizing Security Updates Based on Risk (see URL in Notes) guidance and CISA’s “Forensics Triage Requirements” (see URL in Notes). Follow applicable BOD 26-04 guidance for cloud services or discontinue use of the product if mitigations are unavailable. Stakeholders are responsible for evaluating each asset's internet exposure and ensuring adherence to BOD 26-04 patching guidelines.

Field

Value

KEV Link

https://www.cisa.gov/known-exploited-vulnerabilities-catalog

Date Added to KEV

2026-06-25

Required Action Due Date

2026-06-28

Required Action

Apply mitigations in accordance with vendor instructions, ensuring compliance with CISA’s BOD 26-04 Prioritizing Security Updates Based on Risk (see URL in Notes) guidance and CISA’s “Forensics Triage Requirements” (see URL in Notes). Follow applicable BOD 26-04 guidance for cloud services or discontinue use of the product if mitigations are unavailable. Stakeholders are responsible for evaluating each asset's internet exposure and ensuring adherence to BOD 26-04 patching guidelines.