CVE-2026-20045
Confirmed PUBLISHEDCisco Unified Communications Products Remote Code Execution Vulnerability
1 day faster than CISA KEV
Recommended Action
Prioritize remediation. Validate affected assets and apply vendor fixes on an accelerated timeline.
At a Glance
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.
- CVE Published
- Jan 21, 2026
- Exploitation Reported
- Jun 01, 2026
- CVSS
- 8.2 High
- EPSS
- 4.3%
Affected Versions
72 version rows · page 2 of 3
| Vendor | Product | Version | Status |
|---|---|---|---|
| Cisco |
Cisco Unified Communications Manager
|
15.0.1.13013-1 |
Affected |
| Cisco |
Cisco Unified Communications Manager
|
15.0.1.13014-1 |
Affected |
| Cisco |
Cisco Unified Communications Manager
|
15.0.1.13015-1 |
Affected |
| Cisco |
Cisco Unified Communications Manager
|
15.0.1.13016-1 |
Affected |
| Cisco |
Cisco Unified Communications Manager
|
15.0.1.13017-1 |
Affected |
| Cisco |
Cisco Unified Communications Manager
|
15SU3a |
Affected |
| Cisco |
Cisco Unified Communications Manager IM and Presence Service
|
12.5(1) |
Affected |
| Cisco |
Cisco Unified Communications Manager IM and Presence Service
|
12.5(1)SU1 |
Affected |
| Cisco |
Cisco Unified Communications Manager IM and Presence Service
|
12.5(1)SU2 |
Affected |
| Cisco |
Cisco Unified Communications Manager IM and Presence Service
|
12.5(1)SU3 |
Affected |
| Cisco |
Cisco Unified Communications Manager IM and Presence Service
|
12.5(1)SU4 |
Affected |
| Cisco |
Cisco Unified Communications Manager IM and Presence Service
|
14 |
Affected |
| Cisco |
Cisco Unified Communications Manager IM and Presence Service
|
12.5(1)SU5 |
Affected |
| Cisco |
Cisco Unified Communications Manager IM and Presence Service
|
14SU1 |
Affected |
| Cisco |
Cisco Unified Communications Manager IM and Presence Service
|
12.5(1)SU6 |
Affected |
| Cisco |
Cisco Unified Communications Manager IM and Presence Service
|
14SU2 |
Affected |
| Cisco |
Cisco Unified Communications Manager IM and Presence Service
|
14SU2a |
Affected |
| Cisco |
Cisco Unified Communications Manager IM and Presence Service
|
12.5(1)SU7 |
Affected |
| Cisco |
Cisco Unified Communications Manager IM and Presence Service
|
14SU3 |
Affected |
| Cisco |
Cisco Unified Communications Manager IM and Presence Service
|
12.5(1)SU8 |
Affected |
| Cisco |
Cisco Unified Communications Manager IM and Presence Service
|
15 |
Affected |
| Cisco |
Cisco Unified Communications Manager IM and Presence Service
|
15SU1 |
Affected |
| Cisco |
Cisco Unified Communications Manager IM and Presence Service
|
14SU4 |
Affected |
| Cisco |
Cisco Unified Communications Manager IM and Presence Service
|
12.5(1)SU9 |
Affected |
| Cisco |
Cisco Unified Communications Manager IM and Presence Service
|
15SU2 |
Affected |
CVE References
- cisco-sa-voice-rce-mORhqY4b sec.cloudapps.cisco.com · CVE Record https://sec.cloudapps.cisco.com/security/center/content/CiscoSecurity...
Recommended Actions
- Prioritize remediation. Validate affected assets and apply vendor fixes on an accelerated timeline.
- Check enrichment artifacts for scanner coverage and available PoCs before rolling remediation validation.
- Use the Pro API to automate enrichment, telemetry, and workflow delivery for VM, SOC, and CTI pipelines.
Known Exploited Vulnerability Sources
Catalogues that list this CVE as a known exploited vulnerability.
Per-source evidence links for KEV attestations are available through the KEVIntel 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 |
No detection artifacts or sensor request patterns are available for this CVE yet.
Check back as sensor telemetry and scanner integrations are updated.
Virtual Patch
Compensating WAF rules to help reduce exposure to this CVE. Rule content and deployable vendor exports are available with KEVIntel Enterprise.
KEVIntel does not currently have a virtual patch for this CVE. When available, KEVIntel virtual patches ship as deployable ModSecurity, Cloudflare, and AWS WAF rules.
Enterprise feature. Virtual patch rule content and deployable vendor exports (ModSecurity, Cloudflare, AWS WAF) are available to KEVIntel Enterprise users.
CVSS Scores
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:L/A:N
Exploitation Status
Exploited in the wild
Recorded 2026-06-01 10:49:29 UTC · CVE
Proof of concept available
Recorded 2026-01-25 01:01:31 UTC · GitHub
Weaknesses (CWE)
-
Improper Control of Generation of Code ('Code Injection')
Recent Mentions
Daily CyberSecurity · Jun 15, 2026
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 Cisco RCE (CVE-2026-20045) Exploited in the Wild Under Attack: Cisco Urges Immediate Action as Hackers Actively Exploit SD-WAN Manager Flaws CISA Warns of Active Exploitation in Cisco, PaperCut, and Zimbra
Potential Proof of Concepts
These PoCs are unverified and could contain malware. Use at your own risk.
github · Created 2026-01-25 01:01:31 UTC · 5 stars
CVE-2026-20045
Timeline
Key exploitation, disclosure, scanner coverage, and KEV attestation events for this CVE.
-
17:20 UTC about 1 month ago17:20 UTC · about 1 month ago
KEV confirmed by Daily CyberSecurity
Exploitation attested by an external source
-
14:04 UTC about 2 months ago14:04 UTC · about 2 months ago
Added to CISA KEV
Listed in the CISA Known Exploited Vulnerabilities catalog
-
10:49 UTC about 2 months ago10:49 UTC · about 2 months ago
Added to KEVIntel KEV Feed
High-confidence, third-party attested exploitation
-
01:01 UTC 6 months ago01:01 UTC · 6 months ago
Public PoC available
Public proof-of-concept code published
-
16:26 UTC 6 months ago16:26 UTC · 6 months ago
CVE published
Vulnerability disclosed publicly
-
11:59 UTC 10 months ago11:59 UTC · 10 months ago
CVE ID reserved
Identifier reserved by the CNA
Automate This Intelligence with the Pro API
Confidence scoring, exploit status, sensor telemetry, PoCs, scanner integrations, mentions, and tags are available programmatically for VM, SOC, and CTI workflows.
Pro API Example
GET /api/v2/pro/kevs/CVE-2026-20045
{
"cve_id": "CVE-2026-20045",
"title": "Cisco Unified Communications Products Remote Code Execution Vulnerability",
"affected_vendor": "Cisco",
"affected_product": "Cisco Unified Communications Manager, Cisco Unified Communications Manager IM and Presence Service, Cisco Unity Connection",
"affected_versions": [
{ "vendor": "...", "product": "...", "status": "affected", "display_label": "..." }
],
"confidence": "Confirmed",
"cvss_score": 8.2,
"epss_score": 0.04307,
"exploit_status": {
"exploited_in_the_wild": true,
"active_exploitation_observed": false
},
"sensor_telemetry": { "...": "Pro API fields" },
"proof_of_concepts": [ "..." ],
"scanner_integrations": [ "..." ]
}