How severe is CVE-2026-56788?

CVE-2026-56788 has a CVSS 3.x base score of 4.4, rated medium severity. It is exploitable over local access with low attack complexity, requires no privileges and user interaction. Impact on confidentiality is low, integrity none, and availability low.

Is CVE-2026-56788 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (2nd percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2026-56788?

CVE-2026-56788 affects Rtklib. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2026-56788?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.

Does CVE-2026-56788 have an EU (EUVD) identifier?

Yes. CVE-2026-56788 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2026-39530.

When was CVE-2026-56788 published?

CVE-2026-56788 was published on 2026-06-25 and last updated on 2026-06-27.

CVE-2026-56788

CVE-2026-56788 is a medium-severity vulnerability in Rtklib with a CVSS 3.x base score of 4.4. It is not currently listed as actively exploited by CISA, and its EPSS exploit-prediction score is low. The underlying weakness is classified as CWE-125.

Key facts

Severity: Medium (CVSS 3.x base score 4.4)
CVSS v4: 4.8
EPSS exploit prediction: 0% (2nd percentile)
Actively exploited: Not listed in CISA KEV
EU (EUVD) id: EUVD-2026-39530
Weakness: CWE-125
Affected product: Rtklib
Published: 2026-06-25
Last modified: 2026-06-27

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.

Frequently asked questions

What is CVE-2026-56788?: 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.
How severe is CVE-2026-56788?: CVE-2026-56788 has a CVSS 3.x base score of 4.4, rated medium severity. It is exploitable over local access with low attack complexity, requires no privileges and user interaction. Impact on confidentiality is low, integrity none, and availability low.
Is CVE-2026-56788 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (2nd percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2026-56788?: CVE-2026-56788 affects Rtklib. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2026-56788?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.
Does CVE-2026-56788 have an EU (EUVD) identifier?: Yes. CVE-2026-56788 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2026-39530.
When was CVE-2026-56788 published?: CVE-2026-56788 was published on 2026-06-25 and last updated on 2026-06-27.

References

Affected products (1)

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

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