CVE-2022-20773
HighCVSS 7.5Exploitation Probability (EPSS)
Elevated risk61th percentile - higher than 61% of all known CVEs
Summary
A vulnerability in the key-based SSH authentication mechanism of Cisco Umbrella Virtual Appliance (VA) could allow an unauthenticated, remote attacker to impersonate a VA. This issue is due to the presence of a static SSH host key.
Risk Assessment
An attacker could exploit this vulnerability by performing a man-in-the-middle attack on an SSH connection to the Umbrella VA, potentially leading to the disclosure of administrator credentials, configuration changes, or reloading the VA.
Recommendation
It is recommended to disable SSH on the Umbrella VA if not needed and to regularly update SSH host keys to minimize the risk of attack.
Related vulnerabilities
- CVE-2026-102425Critical
Joomla Extension - balbooa.com - Unauthenticated RCE via field shortcode injection in Balbooa Forms < 2.4.3.4 - Balbooa Forms supports administrator-defined PHP code which runs after a public form submission. The feature also supports form-field shortcodes inside that PHP. Before calling `eval()`, the component replaces each shortcode with the raw value submitted by the visitor, leading to an RCE vector. A public form must use the product's optional PHP-after-submission action and interpolate an attacker-controlled field shortcode inside a double-quoted PHP string to be vulnerable.
- CVE-2023-54400Critical
Fumasoft Fumeng Cloud contains a SQL injection vulnerability in the AjaxMethod.ashx endpoint that allows unauthenticated remote attackers to inject arbitrary SQL through the Name parameter of the getEmpByname action without any authentication. Attackers can exploit UNION-based SQL injection techniques against the Microsoft SQL Server backend to extract, disclose, and modify database contents, with potential for further compromise of the underlying server. Exploitation evidence was first observed by the Shadowserver Foundation on 2023-10-18.
- CVE-2026-22094Critical
The firmware for the EVbee DC-80 has a weak hardcoded root password, which allows attackers to login as root using the SSH daemon that is exposed to the network.
- CVE-2026-82973Critical
Improper neutralization of CRLF sequences in IMAP command construction in psyb0t/docker-mailbox before 0.4.13 allows a remote unauthenticated attacker, when bearer-token authentication is not configured, to inject additional IMAP commands into an authenticated upstream mailbox connection via crafted folder, UID, or search values.
- CVE-2026-7192Critical
A stack-based buffer overflow vulnerability in the Dbit T-CPE301K 4G WiFi minirouter allows an authenticated attacker to cause a denial of service (DoS) and a system reboot via a manipulated HTTP POST request directed at the endpoint '/js/common/do_cmd.js' endpoint containing an excessively long parameter, which overwrites the PC and RA registers.
- CVE-2026-100819Critical
Sandbox escape due to incorrect boundary conditions in the XPCOM component. This vulnerability was fixed in Firefox ESR 153.4, Firefox 157, Firefox ESR 115.42, and Firefox ESR 140.17.
- CVE-2026-100818Critical
Vulnerability allows sandbox escape due to use-after-free in the Widget: Gtk component. It was fixed in Firefox ESR 153.4, Firefox 157, and Firefox ESR 140.17.
- CVE-2026-100811Critical
Vulnerability allows sandbox escape due to use-after-free in the DOM: Core & HTML component. It was fixed in Firefox ESR 153.4, Firefox 157, and Firefox ESR 140.17.
- CVE-2026-100804Critical
Vulnerability allows sandbox escape due to use-after-free in the Preferences: Backend component. It was fixed in Firefox 157.
- CVE-2026-100800Critical
Vulnerability allows sandbox escape due to use-after-free in the Disability Access APIs component. It was fixed in Firefox ESR 153.4 and Firefox 157.
Original NVD description (English source)
A vulnerability in the key-based SSH authentication mechanism of Cisco Umbrella Virtual Appliance (VA) could allow an unauthenticated, remote attacker to impersonate a VA. This vulnerability is due to the presence of a static SSH host key. An attacker could exploit this vulnerability by performing a man-in-the-middle attack on an SSH connection to the Umbrella VA. A successful exploit could allow the attacker to learn the administrator credentials, change configurations, or reload the VA. Note: SSH is not enabled by default on the Umbrella VA.
Vulnerability data from NVD (NIST) · CISA KEV · EPSS