HOMEVULNERABILITIESCVE-2026-56788
HIGH

CVE-2026-56788

CWE-125Published: June 25, 2026· Updated: Jun 27, 2026

7.1
CVSS v3.1
EPSS:0.12%probability of exploitation in 30 daysPercentile:2.1th

Official Description

RTKLIB through 2.4.3 contains an out-of-bounds read vulnerability in getcodepri function when processing unrecognized RINEX observation codes, allowing attackers to trigger denial of service. Crafted RINEX files with unknown observation types cause negative array indexing into the codepris table, resulting in reliable crashes and potential memory disclosure of adjacent global data.

NVD Source

Technical Analysis

CVE-2026-56788 requires local access, meaning attackers must already have a foothold on the target system.

Exploitation does not require any privileges, though user interaction (Required) is needed, which slightly reduces the risk of mass automated attacks.

A successful exploit results in complete confidentiality breach (data exposure), availability disruption (denial of service), with a CVSS base score of 7.1.

CVSS v3.1 Vector Breakdown

Exploitability
Attack VectorLocal
Attack ComplexityLow
Privileges Req.None
User InteractionRequired
ScopeUnchanged
Impact
ConfidentialityHigh
IntegrityNone
AvailabilityHigh
CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:N/A:H

Affected Vendors & Products

rtklib1 product
rtklib
Source: NVD CPE · 1 total CPE entries

Exploit & PoC Resources

NO KNOWN EXPLOITNo public exploit confirmed at this time
Exploit-DB
Offensive Security exploit database
GitHub PoC Search
Community PoC repositories
Rapid7 / Metasploit
Metasploit module search
PacketStorm
Security advisories & exploits
NVD Detail
Official NIST entry
MITRE CVE
CVE Program entry
External links open in a new tab. Always verify in a controlled environment before use.

Official Patches & Advisories

ADVISORYhttps://github.com/tomojitakasu/RTKLIB/issues/797
ADVISORYhttps://www.vulncheck.com/advisories/rtklib-out-of-bounds-read-via-negative-array-index-in-getcodepri
ADVISORYhttps://github.com/tomojitakasu/RTKLIB/issues/797

All References (3)

→
https://github.com/tomojitakasu/RTKLIB/issues/797Exploit · Issue Tracking · Third Party Advisory
→
https://www.vulncheck.com/advisories/rtklib-out-of-bounds-read-via-negative-array-index-in-getcodepriThird Party Advisory
→
https://github.com/tomojitakasu/RTKLIB/issues/797Exploit · Issue Tracking · Third Party Advisory

Quick Facts

CVE IDCVE-2026-56788
CVSS Score7.1 / 10
SeverityHIGH
WeaknessCWE-125
CISA KEVNo
EPSS (30d)0.12%
Affected1 vendor
PublishedJun 25, 2026

Related CVEs (CWE-125)

CVE-2026-34987
9.9
CVE-2026-33642
9.8
CVE-2026-42799
9.8
CVE-2026-24213
9.8
CVE-2025-15646
9.8
CVE-2026-3916
9.6

Recommended Actions

  • →Apply vendor patches immediately
  • →Monitor CVE-2026-56788 in threat intel feeds
  • →Review IDS/IPS signatures for exploitation attempts
Data sourced from NVD (NIST), CISA KEV, and EPSS (FIRST). Analysis generated by CTIWATCH.COM. CVE data is provided under the NVD usage policy.
← All Vulnerabilities·Search for CVE-2026-56788·NVD