CVE-2026-56786 (GCVE-0-2026-56786)
Vulnerability from cvelistv5 – Published: 2026-06-25 18:11 – Updated: 2026-11-08 14:06 X_Open Source
VLAI
EPSS
VEX
Title
RTKLIB 2.4.3 - Out-of-bounds Write in decode_type1033 via Crafted RTCM3 Message
Summary
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.
Severity
9.8 (Critical)
SSVC
Exploitation: poc
Automatable: yes
Technical Impact: total
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-06-25 18:41 UTC
CWE
- CWE-787 - Out-of-bounds Write
Assigner
VulnCheck
CNA
References
2 references
| URL | Tags |
|---|---|
| https://github.com/tomojitakasu/RTKLIB/issues/799 | technical-descriptionexploitissue-tracking |
| https://www.vulncheck.com/advisories/rtklib-out-o… | third-party-advisory |
Impacted products
1 product
| Vendor | Product | Version | |
|---|---|---|---|
| tomojitakasu | RTKLIB |
Affected:
0 , ≤ 2.4.3
(semver)
|
Date Public
2026-06-09 00:00
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Browse all ATT&CK techniques and the vulnerabilities related to each.
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