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Cisco disclosed an authenticated remote code execution vulnerability affecting Cisco ThousandEyes Virtual Appliance and separately reported a remote code execution flaw in Cisco Unified Communications products. The advisories indicate that successful exploitation could allow an attacker to run arbitrary code on impacted systems, putting network monitoring and enterprise communications environments at risk.
The issues were published through Cisco security channels as product advisories for customers using the affected platforms. Organizations running ThousandEyes Virtual Appliance or Cisco Unified Communications deployments should review Cisco's guidance, identify exposed and vulnerable instances, and prioritize remediation to reduce the risk of compromise in business-critical infrastructure.
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2 events from the most recent confirmed update back to the earliest known activity.
Cisco published a security advisory for an authenticated remote code execution vulnerability affecting Cisco ThousandEyes Virtual Appliance. The reference indicates public disclosure of the issue by Cisco.
Cisco published a security advisory for a remote code execution vulnerability affecting Cisco Unified Communications products. The reference indicates Cisco publicly disclosed the vulnerability on this date.
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Cisco released fixes for a **critical remote code execution** vulnerability in Unified Communications and *Webex Calling Dedicated Instance*, tracked as **CVE-2026-20045**, after it was **actively exploited as a zero-day**. The issue stems from **improper validation of user-supplied input in HTTP requests** to the web-based management interface; successful exploitation can provide **user-level OS access** and enable **privilege escalation to root**. Affected products include **Cisco Unified Communications Manager (Unified CM)**, **Unified CM Session Management Edition (SME)**, **Unified CM IM & Presence**, **Cisco Unity Connection**, and **Webex Calling Dedicated Instance**; Cisco provided version-specific remediations including fixed releases and `.cop` patch files (e.g., `ciscocm.V14SU4a_CSCwr21851_remote_code_v1.cop.sha512`). CISA added **CVE-2026-20045** to its **Known Exploited Vulnerabilities (KEV) Catalog**, citing evidence of active exploitation and highlighting code injection flaws as a common attack vector with significant risk to the federal enterprise. Under **Binding Operational Directive (BOD) 22-01**, Federal Civilian Executive Branch agencies are required to remediate KEV-listed vulnerabilities by the specified due date, and CISA urged all organizations to similarly prioritize patching to reduce exposure to ongoing attacks.
Jul 23, 2026
Cisco released emergency fixes for two **critical (CVSS 10.0)** vulnerabilities in its firewall management software that could allow **remote, unauthenticated attackers** to execute code and gain **root-level** access to the underlying operating system. The issues are tracked as `CVE-2026-20079` and `CVE-2026-20131`, and reporting emphasized the risk profile given Cisco’s widespread deployment in large enterprises and the historical interest of sophisticated actors in rapidly weaponizing Cisco bugs. Available reporting stated there were **no confirmed in-the-wild exploitation** reports at the time of publication, but urged rapid patching due to the combination of unauthenticated reachability and full compromise potential. Separate coverage packaged the Cisco flaws alongside other weekly security items (e.g., Tycoon2FA infrastructure takedown and other incidents), but the Cisco item consistently described the same two maximum-severity firewall management vulnerabilities and their impact (RCE leading to root access).
Jun 29, 2026
Attackers are actively exploiting **CVE-2026-20230**, a critical flaw in Cisco Unified Communications Manager (**Unified CM**) and Unified CM Session Management Edition (**Unified CM SME**), shortly after technical details and proof-of-concept code became public. Cisco said the bug stems from improper input validation in certain HTTP requests and can let an unauthenticated attacker perform **SSRF**, write arbitrary files to the underlying operating system, and potentially escalate privileges to **root**; researchers also described a path to unauthenticated remote code execution. Exploitation requires the **WebDialer** service to be enabled, although Cisco notes it is disabled by default. Exploit intelligence firm Defused reported seeing attacks from a single source using an unvetted PoC, with `file://` file-write payloads observed against decoy systems over the weekend. Cisco patched the issue in **Unified CM 14SU6** and **15SU5**, while SSD Secure Disclosure, which reported the vulnerability, published additional technical details showing how attackers could recover a target's true hostname and progress toward code execution. Cisco has advised customers to apply the fixes and, if patching cannot be done immediately, disable **WebDialer** to reduce exposure on widely deployed enterprise voice platforms.
Aug 15, 2026