How severe is CVE-2026-22027?

CVE-2026-22027 has a CVSS 3.x base score of 6.0, rated medium severity. It is exploitable over local access with low attack complexity, requires high privileges and no user interaction. Impact on confidentiality is none, integrity high, and availability high.

Is CVE-2026-22027 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (11th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2026-22027?

CVE-2026-22027 affects Nasa Cryptolib. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2026-22027?

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

Does CVE-2026-22027 have an EU (EUVD) identifier?

Yes. CVE-2026-22027 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2026-1889.

When was CVE-2026-22027 published?

CVE-2026-22027 was published on 2026-01-10 and last updated on 2026-06-17.

CVE-2026-22027

CVE-2026-22027 is a medium-severity vulnerability in Nasa Cryptolib with a CVSS 3.x base score of 6.0. 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-122.

Key facts

Severity: Medium (CVSS 3.x base score 6.0)
CVSS v4: 5.7
EPSS exploit prediction: 0% (11th percentile)
Actively exploited: Not listed in CISA KEV
EU (EUVD) id: EUVD-2026-1889
Weakness: CWE-122
Affected product: Nasa Cryptolib
Published: 2026-01-10
Last modified: 2026-06-17

Description

CryptoLib provides a software-only solution using the CCSDS Space Data Link Security Protocol - Extended Procedures (SDLS-EP) to secure communications between a spacecraft running the core Flight System (cFS) and a ground station. Prior to version 1.4.3, the convert_hexstring_to_byte_array() function in the MariaDB SA interface writes decoded bytes into a caller-provided buffer without any capacity check. When importing SA fields from the database (e.g., IV, ARSN, ABM), a malformed or oversized hex string in the database can overflow the destination buffer, corrupting adjacent heap memory. This issue has been patched in version 1.4.3.

Frequently asked questions

What is CVE-2026-22027?: CryptoLib provides a software-only solution using the CCSDS Space Data Link Security Protocol - Extended Procedures (SDLS-EP) to secure communications between a spacecraft running the core Flight System (cFS) and a ground station. Prior to version 1.4.3, the convert_hexstring_to_byte_array() function in the MariaDB SA interface writes decoded bytes into a caller-provided buffer without any capacity check. When importing SA fields from the database (e.g., IV, ARSN, ABM), a malformed or oversized hex string in the database can overflow the destination buffer, corrupting adjacent heap memory. This issue has been patched in version 1.4.3.
How severe is CVE-2026-22027?: CVE-2026-22027 has a CVSS 3.x base score of 6.0, rated medium severity. It is exploitable over local access with low attack complexity, requires high privileges and no user interaction. Impact on confidentiality is none, integrity high, and availability high.
Is CVE-2026-22027 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (11th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2026-22027?: CVE-2026-22027 affects Nasa Cryptolib. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2026-22027?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.
Does CVE-2026-22027 have an EU (EUVD) identifier?: Yes. CVE-2026-22027 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2026-1889.
When was CVE-2026-22027 published?: CVE-2026-22027 was published on 2026-01-10 and last updated on 2026-06-17.

References

Affected products (1)

cpe:2.3:a:nasa:cryptolib:*:*:*:*:*:*:*:*

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