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CVE-2026-56787

6.9 medium SSVC exploitation: poc Analyzed
NVD · CVE.org

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.

Fix

Nothing published yet: no patch, vendor advisory or mitigation reference on NVD, no vendor advisory in the News for this CVE, not in CISA's KEV, no fixed package version. BaselineWatch does not guess at one.

Change history 1

  1. First seenCVSS 6.9 · rtklibNVD modified 2026-10-25 22:10

Affected (CPE criteria) 1

  • cpe:2.3:a:rtklib:rtklib:*:*:*:*:*:*:*:*

References 2