Quick answers
- Is CVE-2026-93652 exploited in the wild?
- No. Junglewise Threat Intelligence has no report of CVE-2026-93652 being exploited in the wild.
- How severe is CVE-2026-93652?
- High severity, with a CVSS score of 7.5, published 18 September 2026.
- Which products and versions are affected?
- D3TN µD3TN v0.15.0 and earlier.
- Is there a fix for CVE-2026-93652?
- No fixed version is recorded yet. Check the vendor's advisory in the references below. If you run it, Junglewise drafts a mitigation that fits your setup and applies it once you approve, with senior security engineers behind it.
- How is CVE-2026-93652 attacked?
- It is attacked over the network.
- Am I affected by CVE-2026-93652?
- Check whether you run D3TN µD3TN at an affected version. Junglewise does that check for you around the clock: connect your code, cloud and domains, and it matches new vulnerabilities like this one against what you actually run and tells you when one reaches you.
Technical details
An integer overflow vulnerability exists in µD3TN's TCPCLv3 handshake implementation where the peer EID (Endpoint Identifier) length field, stored as uint32_t, is incremented by 1 and used as the size argument to malloc(). When a remote client sends UINT32_MAX as the EID length, the expression "peer_eid_len + 1" wraps to zero, causing malloc(0) to be called. The daemon then attempts to write the original full-length data into the zero-sized allocation via recv(), triggering a heap buffer overflow. This occurs during the initial unauthenticated handshake, allowing any network-reachable attacker to reliably crash the process. The vulnerability has existed since at least the 0.8.0 import in 2020.
Affected products
- D3TN µD3TN v0.15.0 and earlier
Timeline
- 2026-09-18: disclosed