CVE-2026-56787
Medium
Description
RTKLIB through 2.4.3 contains an off-by-one out-of-bounds read vulnerability in the decode_ssr3 function at src/rtcm3.c:1446 that allows remote attackers to trigger a global buffer overflow via crafted RTCM3 SSR messages with attacker-controlled signal mode fields. Remote attackers can exploit this vulnerability by sending malicious SSR correction streams over NTRIP or serial connections to cause denial of service or crash RTKLIB rovers and CORS servers.
SeverityMedium
CVSS6.5
Exploit probability47. percentile0.6%
ProductRtklib
PublishedJun 25, 2026
First seenJun 25, 2026
Weakness typeCWE-193CWE-193
How to fix
Sources list no fixed version or patch link for this vulnerability.
Affected products
| Product | Affected versions | Fixed in |
|---|---|---|
| rtklib rtklib | v ≤ 2.4.3 | — |
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