Quick answers
- Is CVE-2026-85436 exploited in the wild?
- No. Junglewise Threat Intelligence has no report of CVE-2026-85436 being exploited in the wild.
- How severe is CVE-2026-85436?
- High severity, with a CVSS score of 7.5, published 3 September 2026.
- Which products and versions are affected?
- MOOS Essential-Moos through 10.0.1.
- Is there a fix for CVE-2026-85436?
- 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-2026-85436 attacked?
- It is attacked over the network, in a software library.
- Am I affected by CVE-2026-85436?
- Check whether you run MOOS Essential-Moos 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
The vulnerability is a classic buffer overflow in the CMOOSUDPLink::ReadPktFromArray() method, triggered by negative or oversized length fields in incoming UDP datagrams. When processing a crafted packet, the code performs an unchecked memcpy() operation that writes beyond the allocated buffer boundary, corrupting the heap. The attack requires network connectivity to the configured UDPListen port and no authentication; a remote attacker can trigger denial of service or potentially achieve code execution via heap corruption. The vulnerability affects essential-moos versions up to and including 10.0.1.
Affected products
- MOOS essential-moos through 10.0.1
Timeline
- 2026-09-03: disclosed