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Vulnerability · Published Oct 1, 2026 · Assigned by Fortra

CVE-2026-79900Heap overflow in KSL checksum initialization

Medium 6.5

In plain English

A medium-severity out-of-bounds write in BoKS Manager boks-server from Fortra. There are no confirmed reports of exploitation so far. The chance it is exploited in the next 30 days is estimated at 0.2% (higher than 14% of all known vulnerabilities).

Severity (CVSS 3.1)6.5Medium
Exploit odds (30 days)0.2%top 85.5% of all CVEs
Exploited in the wildNo reportsCISA SSVC: none
Attack toolingNoneno public tooling known

Official description

boks_ksllogsd accepts a checksum algorithm name in the MD field of an authenticated KSL start message. Affected releases verify that OpenSSL recognizes the digest name but do not verify that the value fits in a fixed 16-byte checksum context field before copying it. An authenticated KSL client can supply an oversized, OpenSSL-recognized digest name and write beyond the end of the heap allocation.

Affected products (as reported)

VendorProductVersions
Fortra BoKS Manager boks-server 0 – before 8.1.0.240 – before 9.0.0.7

Weakness: CWE-787 · Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H

References