Critical severity9.8NVD Advisory· Published Jun 25, 2026· Updated Jul 14, 2026
CVE-2026-56786
CVE-2026-56786
Description
RTKLIB through 2.4.3 contains an out-of-bounds write vulnerability in decode_type1033 function that fails to clamp length counters to destination buffer size, allowing up to 191-byte overflow into fixed 64-byte descriptor fields. An attacker controlling an NTRIP or serial RTCM3 correction stream can craft a valid CRC-bearing type-1033 message to corrupt adjacent rtcm_t object members, potentially achieving arbitrary code execution or denial of service.
Affected products
3- Range: <=2.4.3
Patches
Vulnerability mechanics
References
2- github.com/tomojitakasu/RTKLIB/issues/799nvdExploitIssue TrackingThird Party Advisory
- www.vulncheck.com/advisories/rtklib-out-of-bounds-write-in-decode-type1033-via-crafted-rtcm3-messagenvdThird Party Advisory
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