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Vulnerabilities

Cisco AsyncOS any version

Ranked by severity, then by exploit likelihood. Click a CVE ID for its full record.

37CVEs
CVE-2025-20393
Cisco Secure Email Gateway and Cisco Secure Email and Web Manager Remote Command Execution Vulnerability
Published 2025-12-17 · Analyzed
10.0KEVEPSS 0.324
CVE-2026-76461
Cisco Secure Email Gateway SQL Injection Vulnerability
Published 2026-09-14 · Analyzed
9.8KEVEPSS 0.283
CVE-2021-1359
Cisco Web Security Appliance Privilege Escalation Vulnerability
Published 2021-07-08 · Modified
9.0EPSS 0.019
CVE-2019-15956
Cisco Web Security Appliance Unauthorized Device Reset Vulnerability
Published 2019-11-26 · Modified
8.8EPSS 0.010
CVE-2022-20868
A vulnerability in the web-based management interface of Cisco Email Security Appliance, Cisco Secure Email and Web Manager and Cisco Secure Web Appliance could allow an authenticated, remote attacker to elevate privileges on an affected system. The attacker needs valid credentials to exploit this vulnerability. This vulnerability is due to the use of a hardcoded value to encrypt a token used for certain APIs calls . An attacker could exploit this vulnerability by authenticating to the device and sending a crafted HTTP request. A successful exploit could allow the attacker to impersonate another valid user and execute commands with the privileges of that user account.
Published 2022-11-03 · Modified
8.8EPSS 0.007
CVE-2018-15460
Cisco Email Security Appliance URL Filtering Denial of Service Vulnerability
Published 2019-01-10 · Modified
8.6EPSS 0.025
CVE-2021-34698
Cisco Web Security Appliance Proxy Service Denial of Service Vulnerability
Published 2021-10-06 · Modified
8.6EPSS 0.014
CVE-2019-1886
Cisco Web Security Appliance HTTPS Certificate Denial of Service Vulnerability
Published 2019-07-04 · Modified
8.6EPSS 0.013
CVE-2024-20383
Cisco Secure Email and Web Manager Stored Cross-Site Scripting Vulnerability
Published 2024-05-15 · Modified
8.4EPSS 0.004
CVE-2019-1983
Cisco Email Security Appliance and Cisco Content Security Management Appliance Denial of Service Vulnerability
Published 2020-09-23 · Modified
7.8EPSS 0.019
CVE-2020-3367
Cisco Secure Web Appliance Privilege Escalation Vulnerability
Published 2020-11-18 · Modified
7.8EPSS 0.008
CVE-2019-1884
Cisco Web Security Appliance Web Proxy Denial of Service Vulnerability
Published 2019-07-04 · Modified
7.7EPSS 0.015
CVE-2016-1461
Cisco AsyncOS on Email Security Appliance (ESA) devices through 9.7.0-125 allows remote attackers to bypass malware detection via a crafted attachment in an e-mail message, aka Bug ID CSCuz14932.
Published 2016-08-01 · Modified
7.5EPSS 0.024
CVE-2022-20653
Cisco Email Security Appliance DNS Verification Denial of Service Vulnerability
Published 2022-02-17 · Modified
7.5EPSS 0.018
CVE-2021-34741
Cisco Email Security Appliance Denial of Service Vulnerability
Published 2021-11-04 · Modified
7.5EPSS 0.013
CVE-2021-1566
Cisco Email Security Appliance and Cisco Web Security Appliance Certificate Validation Vulnerability
Published 2021-06-16 · Modified
7.4EPSS 0.007
CVE-2021-1516
Cisco Content Security Management Appliance, Email Security Appliance, and Web Security Appliance Information Disclosure Vulnerability
Published 2021-05-06 · Modified
6.5EPSS 0.010
CVE-2022-20942
A vulnerability in the web-based management interface of Cisco Email Security Appliance (ESA), Cisco Secure Email and Web Manager, and Cisco Secure Web Appliance, formerly known as Cisco Web Security Appliance (WSA), could allow an authenticated, remote attacker to retrieve sensitive information from an affected device, including user credentials. This vulnerability is due to weak enforcement of back-end authorization checks. An attacker could exploit this vulnerability by sending a crafted HTTP request to an affected device. A successful exploit could allow the attacker to obtain confidential data that is stored on the affected device.
Published 2022-11-03 · Modified
6.5EPSS 0.010
CVE-2020-3547
Cisco Email Security Appliance, Cisco Content Security Management Appliance, and Cisco Web Security Appliance Information Disclosure Vulnerability
Published 2020-09-04 · Modified
6.5EPSS 0.009
CVE-2022-20867
A vulnerability in web-based management interface of the of Cisco Email Security Appliance and Cisco Secure Email and Web Manager could allow an authenticated, remote attacker to conduct SQL injection attacks as root on an affected system. The attacker must have the credentials of a high-privileged user account. This vulnerability is due to improper validation of user-submitted parameters. An attacker could exploit this vulnerability by authenticating to the application and sending malicious requests to an affected system. A successful exploit could allow the attacker to obtain data or modify data that is stored in the underlying database of the affected system.
Published 2022-11-03 · Modified
6.5EPSS 0.008
CVE-2021-1425
Cisco Cisco Email Security Appliance and Content Security Management Appliance Information Disclosure Vulnerability
Published 2024-11-18 · Analyzed
6.5EPSS 0.005
CVE-2024-20258
A vulnerability in the web-based management interface of Cisco AsyncOS Software for Cisco Secure Email and Web Manager and Secure Email Gateway could allow an unauthenticated, remote attacker to conduct an XSS attack against a user of the interface. This vulnerability is due to insufficient validation of user input. An attacker could exploit this vulnerability by persuading a user of an affected interface to click a crafted link. A successful exploit could allow the attacker to execute arbitrary script code in the context of the affected interface or access sensitive, browser-based information.
Published 2024-05-15 · Analyzed
6.1EPSS 0.003
CVE-2017-12218
A vulnerability in the malware detection functionality within Advanced Malware Protection (AMP) of Cisco AsyncOS Software for Cisco Email Security Appliances (ESAs) could allow an unauthenticated, remote attacker to cause an email attachment containing malware to be delivered to the end user. The vulnerability is due to the failure of AMP to scan certain EML attachments that could contain malware. An attacker could exploit this vulnerability by sending an email with a crafted EML attachment through the targeted device. A successful exploit could allow the attacker to bypass the configured ESA email message and content filtering and allow the malware to be delivered to the end user. Vulnerable Products: This vulnerability affects Cisco AsyncOS Software for Cisco ESA, both virtual and hardware appliances, that are configured with message or content filters to scan incoming email attachments on the ESA. Cisco Bug IDs: CSCuz81533.
Published 2017-09-07 · Modified
5.8EPSS 0.016
CVE-2017-12353
A vulnerability in the Multipurpose Internet Mail Extensions (MIME) scanner of Cisco AsyncOS Software for Cisco Email Security Appliances (ESA) could allow an unauthenticated, remote attacker to bypass configured user filters on the device. The vulnerability is due to improper error handling of a malformed MIME header in an email attachment. An attacker could exploit this vulnerability by sending an email with a crafted MIME attachment. For example, a successful exploit could allow the attacker to bypass configured user filters to drop the email. The malformed MIME headers may not be RFC compliant. However, some mail clients could still allow users to access the attachment, which may not have been properly filtered by the device. Cisco Bug IDs: CSCvf44666.
Published 2017-11-30 · Modified
5.8EPSS 0.016
CVE-2020-3368
Cisco Email Security Appliance URL Filtering Bypass Vulnerability
Published 2020-06-18 · Modified
5.8EPSS 0.014
CVE-2021-1534
Cisco Email Security Appliance URL Filtering Bypass Vulnerability
Published 2021-10-06 · Modified
5.8EPSS 0.011
CVE-2020-3568
Cisco Email Security Appliance URL Filtering Bypass Vulnerability
Published 2020-10-08 · Modified
5.8EPSS 0.010
CVE-2020-26082
A vulnerability in the zip decompression engine of Cisco AsyncOS Software for Cisco Email Security Appliance (ESA) could allow an unauthenticated, remote attacker to bypass content filters that are configured on an affected device. The vulnerability is due to improper handling of password-protected zip files. An attacker could exploit this vulnerability by sending a malicious file inside a crafted zip-compressed file to an affected device. A successful exploit could allow the attacker to bypass configured content filters that would normally drop the email.
Published 2023-08-04 · Modified
5.8EPSS 0.006
CVE-2022-20781
Cisco Web Security Appliance Stored Cross-Site Scripting Vulnerability
Published 2022-04-06 · Modified
5.4EPSS 0.006
CVE-2022-20675
Multiple Cisco Security Products Simple Network Management Protocol Service Denial of Service Vulnerability
Published 2022-04-06 · Modified
5.3EPSS 0.013
CVE-2020-3546
Cisco Email Security Appliance Information Disclosure Vulnerability
Published 2020-09-04 · Modified
5.3EPSS 0.011
CVE-2022-20952
A vulnerability in the scanning engines of Cisco AsyncOS Software for Cisco Secure Web Appliance, formerly known as Cisco Web Security Appliance (WSA), could allow an unauthenticated, remote attacker to bypass a configured rule, thereby allowing traffic onto a network that should have been blocked. This vulnerability exists because malformed, encoded traffic is not properly detected. An attacker could exploit this vulnerability by connecting through an affected device to a malicious server and receiving malformed HTTP responses. A successful exploit could allow the attacker to bypass an explicit block rule and receive traffic that should have been rejected by the device.
Published 2023-02-16 · Modified
5.3EPSS 0.007
CVE-2023-20057
A vulnerability in the URL filtering mechanism of Cisco AsyncOS Software for Cisco Email Security Appliance (ESA) could allow an unauthenticated, remote attacker to bypass the URL reputation filters on an affected device. This vulnerability is due to improper processing of URLs. An attacker could exploit this vulnerability by crafting a URL in a particular way. A successful exploit could allow the attacker to bypass the URL reputation filters that are configured for an affected device, which could allow malicious URLs to pass through the device.
Published 2023-01-19 · Modified
5.3EPSS 0.007
CVE-2014-3381
The ZIP inspection engine in Cisco AsyncOS 8.5 and earlier on the Cisco Email Security Appliance (ESA) does not properly analyze ZIP archives, which allows remote attackers to bypass malware filtering via a crafted archive, aka Bug ID CSCup07934.
Published 2014-10-19 · Modified
5.0EPSS 0.017
CVE-2014-2195
Cisco AsyncOS on Email Security Appliance (ESA) and Content Security Management Appliance (SMA) devices, when Active Directory is enabled, does not properly handle group names, which allows remote attackers to gain role privileges by leveraging group-name similarity, aka Bug ID CSCum86085.
Published 2014-05-20 · Modified
4.3EPSS 0.012
CVE-2015-0605
The uuencode inspection engine in Cisco AsyncOS on Cisco Email Security Appliance (ESA) devices 8.5 and earlier allows remote attackers to bypass intended content restrictions via a crafted e-mail attachment with uuencode encoding, aka Bug ID CSCzv54343.
Published 2015-02-07 · Modified
4.3EPSS 0.012
CVE-2015-0577
Multiple cross-site scripting (XSS) vulnerabilities in the IronPort Spam Quarantine (ISQ) page in Cisco AsyncOS, as used on the Cisco Email Security Appliance (ESA) and Content Security Management Appliance (SMA), allow remote attackers to inject arbitrary web script or HTML via unspecified parameters, aka Bug IDs CSCus22925 and CSCup08113.
Published 2015-01-14 · Modified
4.3EPSS 0.012