CVE-2020-3259
CISA KEVPublished February 15, 2024 · Updated April 3, 2026
high
Official Description+
Cisco Adaptive Security Appliance (ASA) and Firepower Threat Defense (FTD) contain an information disclosure vulnerability. An attacker could retrieve memory contents on an affected device, which could lead to the disclosure of confidential information due to a buffer tracking issue when the software parses invalid URLs that are requested from the web services interface. This vulnerability affects only specific AnyConnect and WebVPN configurations.
Affected Products
| Vendor | Product |
|---|---|
| Cisco | Adaptive Security Appliance (ASA) and Firepower Threat Defense (FTD) |
Patch Status
Patch by 2024-03-07
Recommended Actions
- Check if your systems use any of the affected products listed above.
- Apply vendor patches immediately if available.
- This vulnerability is in CISA's Known Exploited Vulnerabilities catalog — prioritize remediation.
- Monitor vendor advisories for updates and additional mitigations.
- Review logs for indicators of compromise related to CVE-2020-3259.