Loading vulnerability…
CVE-2026-25075 is an integer underflow vulnerability in the EAP-TTLS AVP parser used by strongSwan, affecting versions 4.5.0 through 6.0.4 (fixed in 6.0.5). During IKEv2 authentication, the vulnerable parser processes tunneled AVPs and computes a payload length by subtracting the 8-byte AVP header size from an attacker-controlled AVP length field without first verifying that the supplied length is at least 8. If the AVP length is between 0 and 7, this subtraction underflows, producing a very large unsigned value. The resulting value can drive excessive memory allocation attempts and subsequent invalid memory operations, including NULL pointer dereference or heap corruption during memcpy(), ultimately crashing the charon IKE daemon. The issue is reachable remotely and without authentication when the target exposes IKEv2 and uses the vulnerable EAP-TTLS code path.
Mallory correlates every CVE against your assets, your vendors, and active adversary campaigns. Know which vulnerabilities matter for you, not just which ones are loud.
What it means. What to do now. Patch path, mitigations, and the assume-compromise checklist.
What an attacker gets, and what they’ve been doing with it.
If you can’t patch tonight, do this now.
Patch, then assume compromise.
No valid public exploits. Mallory filtered out 1 candidate as fakes, detection scripts, or README-only repos.
All candidate exploits were filtered out by Mallory's validation.
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.
21 sources tracked across advisories, community write-ups, and news. New activity surfaces here as Mallory finds it.
An integer underflow vulnerability in the strongSwan EAP-TTLS AVP parser that allows remote, unauthenticated attackers to crash the VPN server's IKE daemon, causing denial of service.
An integer underflow vulnerability in the strongSwan EAP-TTLS AVP parser that can be exploited by unauthenticated remote attackers to cause denial of service during IKEv2 authentication, potentially triggering excessive memory allocation or a NULL pointer dereference and crashing the charon IKE daemon.
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.