SSH key-based authentication bypass in Cisco Secure Firewall ASA proprietary SSH stack
A vulnerability in Cisco Secure Firewall Adaptive Security Appliance (ASA) Software’s proprietary SSH implementation when using SSH key-based authentication allows an unauthenticated remote attacker to authenticate as a specific user without possessing that user’s private key. The issue is caused by insufficient validation of user-supplied input during the SSH authentication phase; by sending crafted authentication input, an attacker can complete login as the targeted user provided they know a valid username and have the corresponding public key. Successful exploitation permits command execution as that specific user (not root).
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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.
Mitigation
If you can’t patch tonight, do this now.
Remediation
Patch, then assume compromise.
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.