CVE-2019-1955
7.5 · HIGHOverview
CVE-2019-1955 is a high-severity vulnerability affecting cisco email_security_appliance_firmware. It was published on August 8, 2019 and has a CVSS 3.1 base score of 7.5 (HIGH).
This vulnerability has a CVSS 3.1 base score of 7.5, rated HIGH. It can be exploited remotely over the network. No authentication or special privileges are required for exploitation.
Technical Description
A vulnerability in the Sender Policy Framework (SPF) functionality 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 incomplete input and validation checking mechanisms for certain SPF messages that are sent to an affected device. An attacker could exploit this vulnerability by sending a customized SPF packet to an affected device. A successful exploit could allow the attacker to bypass the header filters that are configured for the affected device, which could allow malicious content to pass through the device.
Remediation
Check the references section for vendor advisories and patches from cisco. Update email_security_appliance_firmware to the latest patched version. If immediate patching is not possible, review the CVSS vector to understand the attack surface and apply compensating controls such as network segmentation or access restrictions.
Affected Products
| Vendor | Product | Versions | Status |
|---|---|---|---|
| cisco | email_security_appliance_firmware | >= 0, < 4.0mr1 | Affected |
Frequently Asked Questions
What is CVE-2019-1955?
CVE-2019-1955 is a high-severity vulnerability affecting cisco email_security_appliance_firmware. It was published on August 8, 2019 and has a CVSS 3.1 base score of 7.5 (HIGH).
How severe is CVE-2019-1955?
This vulnerability has a CVSS 3.1 base score of 7.5, rated HIGH. It can be exploited remotely over the network. No authentication or special privileges are required for exploitation.
How do I fix or remediate CVE-2019-1955?
Check the references section for vendor advisories and patches from cisco. Update email_security_appliance_firmware to the latest patched version. If immediate patching is not possible, review the CVSS vector to understand the attack surface and apply compensating controls such as network segmentation or access restrictions.
How can CyberStrike help with CVE-2019-1955?
CyberStrike's AI-powered security agents can automatically detect CVE-2019-1955 across your infrastructure using autonomous pentesting, DAST scanning, and HackBrowser. The platform continuously monitors for known vulnerabilities and provides actionable remediation guidance prioritized by real-world exploitability.
How CyberStrike Helps
AI agents map your attack surface to find vulnerabilities like this one.
Automated penetration testing that runs continuously, not just quarterly.
AI-driven PR review catches vulnerable dependencies before they ship.
Browser-based exploitation validates findings with real proof-of-concept.
Related HIGH CVEs from 2019
View all →An exploitable SQL injection vulnerability exist in YouPHPTube 7.7. When the "VideoTags" plugin is e
A file-upload vulnerability exists in Rukovoditel 2.3.1. index.php?module=configuration/save allows
A use-after-free issue was found in the way the Linux kernel's KVM hypervisor processed posted inter
An error-based SQL injection vulnerability in product/card.php in Dolibarr version 8.0.2 allows remo
SQL injection vulnerability in user/card.php in Dolibarr version 8.0.2 allows remote authenticated u
SAP Enterprise Financial Services (fixed in SAPSCORE 1.13, 1.14, 1.15; S4CORE 1.01, 1.02, 1.03; EA-F
Under some circumstances, masterdata maintenance in SAP BW/4HANA (fixed in DW4CORE version 1.0 (SP08
A remote code execution vulnerability exists in the way that the MSHTML engine inproperly validates
An elevation of privilege exists in Windows COM Desktop Broker, aka "Windows COM Elevation of Privil
An elevation of privilege vulnerability exists in Microsoft Edge Browser Broker COM object, aka "Mic
A remote code execution vulnerability exists in Microsoft Word software when it fails to properly ha
D-Link DIR-822 C1 before v3.11B01Beta, DIR-822-US C1 before v3.11B01Beta, DIR-850L A* before v1.21B0