DoS in Cisco Secure Firewall FTD SSL Decryption Do Not Decrypt exclusion (TLS 1.2)
A vulnerability in the SSL decryption feature of Cisco Secure Firewall Threat Defense (FTD) Software, specifically in the “Do Not Decrypt” exclusion handling, allows an unauthenticated remote attacker to trigger a denial-of-service condition. The issue is caused by improper memory management during inspection of TLS 1.2 encrypted traffic. An attacker can exploit the flaw by sending crafted TLS 1.2 encrypted traffic through an affected device, which can result in the device reloading. The vulnerability is limited to TLS 1.2 traffic; other TLS versions are not affected.
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Impact, mitigation & remediation
What it means. What to do now. Patch path, mitigations, and the assume-compromise checklist.
Impact
What an attacker gets, and what they’ve been doing with it.
Exploits
No public exploits tracked yet. Mallory keeps watching.
No public exploit code observed for this vulnerability.
Affected products & vendors
Products and vendors Mallory has correlated with this vulnerability. Open in Mallory to drill down to specific CPE configurations and version ranges.
Vendor-confirmed product mapping. Mallory continuously reconciles this list against your asset inventory.
Recent activity
3 sources tracked across advisories, community write-ups, and news. New activity surfaces here as Mallory finds it.
The version that knows your environment.
Query your assets running an affected version, and investigate the blast radius.
Every observed campaign linking this CVE to a named adversary.
Malware families riding this exploit, with evidence and IOCs.
YARA, Sigma, Snort, and vendor rules, auto-deployed to your SIEM.
Cross-references every affected SKU, including bundled OEM variants.
Community discussion across Reddit, Mastodon, and other social sources.