Quick answers
- Is CVE-2026-79900 exploited in the wild?
- No. Junglewise Threat Intelligence has no report of CVE-2026-79900 being exploited in the wild.
- How severe is CVE-2026-79900?
- Medium severity, with a CVSS score of 6.5, published 1 October 2026.
- Which products and versions are affected?
- Fortra boks_ksllogsd.
- Is there a fix for CVE-2026-79900?
- 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-2026-79900 attacked?
- It is attacked over the network, in a network appliance.
- Am I affected by CVE-2026-79900?
- Check whether you run Fortra Boks Ksllogsd. 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 heap buffer overflow in boks_ksllogsd's handling of the MD (message digest) field in authenticated KSL start messages. The service validates that the supplied algorithm name is recognized by OpenSSL but fails to check that the name's length fits within a fixed 16-byte checksum context field before copying, enabling out-of-bounds heap writes. An attacker must be authenticated to the KSL protocol to trigger this flaw.
Affected products
- Fortra boks_ksllogsd
Timeline
- 2026-10-01: disclosed