What it is
CVE-2026-20045 is an unauthenticated vulnerability affecting Cisco Cisco Unified Communications Manager and 2 other products. A vulnerability in Cisco Unified Communications Manager (Unified CM), Cisco Unified...
Vulnerability report
Exploited in the wild
Confirmed confidence
In CISA KEV
CVE-2026-20045
Cisco Unified Communications Manager Remote Code Execution
Cisco / Cisco Unified Communications Manager · 12.5(1)SU2
- Severity
- CVSS 8.2 · High
- Confidence
- Confirmed
- Exploit status
- Exploited in the wild
- EPSS
- 4.3%
- First observed
- —
- Last observed
- —
Decision summary
What security teams need to know first
Direct answers before the deeper technical record.
Is it exploited?
Yes. KEV Intelligence tracks this CVE as a known exploited vulnerability. Confidence is confirmed.
Who is affected?
Cisco / Cisco Unified Communications Manager 12.5(1)su2.
What should we do?
Prioritize remediation. Validate affected assets and apply vendor fixes on an accelerated timeline.
Overview
Cisco Unified Communications Manager Remote Code Execution
A vulnerability in Cisco Unified Communications Manager (Unified CM), Cisco Unified Communications Manager Session Management Edition (Unified CM SME), Cisco Unified Communications Manager IM & Presence Service (Unified CM IM&P), Cisco Unity Connection, and Cisco Webex Calling Dedicated Instance could allow an unauthenticated, remote attacker to execute arbitrary commands on the underlying operating system of an affected device.
This vulnerability is due to improper validation of user-supplied input in HTTP requests. An attacker could exploit this vulnerability by sending a sequence of crafted HTTP requests to the web-based management interface of an affected device. A successful exploit could allow the attacker to obtain user-level access to the underlying operating system and then elevate privileges to root. Note: Cisco has assigned this security advisory a Security Impact Rating (SIR) of Critical rather than High as the score indicates. The reason is that exploitation of this vulnerability could result in an attacker elevating privileges to root.
Vendor
Product
Affected
Status
Cisco
Cisco Unified Communications Manager
12.5(1)SU2
Affected
Cisco
Cisco Unified Communications Manager
12.5(1)SU1
Affected
Cisco
Cisco Unified Communications Manager
12.5(1)
Affected
Cisco
Cisco Unified Communications Manager
12.5(1)SU3
Affected
Cisco
Cisco Unified Communications Manager
12.5(1)SU4
Affected
Cisco
Cisco Unified Communications Manager
14
Affected
Cisco
Cisco Unified Communications Manager
12.5(1)SU5
Affected
Cisco
Cisco Unified Communications Manager
14SU1
Affected
Cisco
Cisco Unified Communications Manager
12.5(1)SU6
Affected
Cisco
Cisco Unified Communications Manager
14SU2
Affected
Cisco
Cisco Unified Communications Manager
12.5(1)SU7
Affected
Cisco
Cisco Unified Communications Manager
12.5(1)SU7a
Affected
Cisco
Cisco Unified Communications Manager
14SU3
Affected
Cisco
Cisco Unified Communications Manager
12.5(1)SU8
Affected
Cisco
Cisco Unified Communications Manager
12.5(1)SU8a
Affected
Cisco
Cisco Unified Communications Manager
15
Affected
Cisco
Cisco Unified Communications Manager
15SU1
Affected
Cisco
Cisco Unified Communications Manager
14SU4
Affected
Cisco
Cisco Unified Communications Manager
14SU4a
Affected
Cisco
Cisco Unified Communications Manager
15SU1a
Affected
Cisco
Cisco Unified Communications Manager
12.5(1)SU9
Affected
Cisco
Cisco Unified Communications Manager
15SU2
Affected
Cisco
Cisco Unified Communications Manager
15.0.1.13010-1
Affected
Cisco
Cisco Unified Communications Manager
15.0.1.13011-1
Affected
Cisco
Cisco Unified Communications Manager
15.0.1.13012-1
Affected
- Published
- 21 Jan 2026
- Exploitation Reported
- 01 Jun 2026
- Attack vector
- Remote
- Complexity
- Low
- Privileges
- None
- User interaction
- None
Tags
cisa
edge
CVE References
- CVE Record CVE.org · CVE Record https://www.cve.org/CVERecord?id=CVE-2026-20045
- cisco-sa-voice-rce-mORhqY4b sec.cloudapps.cisco.com · CVE Record https://sec.cloudapps.cisco.com/security/center/content/CiscoSecurity...
Exploitation evidence
Why KEV Intelligence marks this CVE as exploited
Third-party attestation and first-party sensor observation are shown separately so teams can judge the evidence chain.
Exploited in the wild
CVE
Independent exploitation attestation added to the KEV Intelligence record.
Known exploited vulnerability sources
Per-source evidence links for KEV attestations are available through the KEV Intelligence Pro API.
Learn about Pro API access| Source | Added |
|---|---|
| CVE First | 2026-06-01 10:49 UTC |
| CISA | 2026-06-02 14:04 UTC |
| Daily CyberSecurity | 2026-06-15 17:20 UTC |
Detection
Operational artifacts and observed signals
Make the evidence actionable in scanner, SOC, and edge-control workflows.
Observed signals
- Request targets
- 0
- User-Agents
- 0
Raw values available in Pro and Enterprise.
Scanner coverage
No scanner integrations recorded yet.
Virtual patch status
No KEV Intelligence virtual patch is currently available. Future rules ship for ModSecurity, Cloudflare, and AWS WAF.
Learn about virtual patches →No detection artifacts or sensor request patterns are available for this CVE yet.
Check back as sensor telemetry and scanner integrations are updated.
Risk and context
Severity, weaknesses, and research context
CVSS v3.1
8.2
High
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:L/A:N
EPSS
4.3%
Recent mention · Daily CyberSecurity
Cisco SD-WAN Vulnerability Exploited in the Wild: Patch CVE-2026-20262 Now
A Cisco SD-WAN vulnerability is now under active attack, and Cisco is urging customers to patch fast. Tracked The post Cisco SD-WAN Vulnerability Exploited in the Wild: Patch CVE-2026-20262 Now appeared first on Daily CyberSecurity. Related posts: Under Attack: Critical...
Read full advisoryTimeline
From disclosure to observed exploitation
-
KEV confirmed by Daily CyberSecurity
Exploitation attested by an external source
-
Added to CISA KEV
Listed in the CISA Known Exploited Vulnerabilities catalog
-
Added to KEV Intelligence KEV Feed
High-confidence, third-party attested exploitation
-
CVE published
Vulnerability disclosed publicly
-
CVE ID reserved
Identifier reserved by the CNA
Pro API
Automate this intelligence
Confidence, exploit status, sensor telemetry, PoCs, scanner integrations, mentions, and tags are available programmatically for VM, SOC, and CTI workflows.
- Evidence confidence and provenance
- First-party sensor telemetry
- PoC and scanner references
- Affected versions and enrichment
- Automation-ready JSON delivery
GET /api/v2/pro/kevs/CVE-2026-20045
Free JSON includes basic KEV fields{
"cve_id": "CVE-2026-20045",
"confidence": "Confirmed",
"cvss_score": 8.2,
"cvss_estimated": false,
"epss_score": 0.04307,
"exploit_status": {
"exploited_in_the_wild": true,
"active_exploitation_observed": false
},
"sensor_telemetry": { "attempts": 0, "sensors": 0 }
}Early warning alerts
Get alerts on high-impact exploitation
Receive curator-selected alerts when exploitation activity warrants attention. Each alert includes the evidence and context needed to decide what requires attention now.