CVE-2026-21898

HIGH
2026-01-10 [email protected]
8.2
CVSS 3.1
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CVSS Vector

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:H
Attack Vector
Network
Attack Complexity
Low
Privileges Required
None
User Interaction
None
Scope
Unchanged
Confidentiality
Low
Integrity
None
Availability
High

Lifecycle Timeline

3
Analysis Generated
Mar 12, 2026 - 21:54 vuln.today
PoC Detected
Jan 15, 2026 - 21:48 vuln.today
Public exploit code
CVE Published
Jan 10, 2026 - 01:16 nvd
HIGH 8.2

Tags

Buffer Overflow Information Disclosure Cryptolib

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 Crypto_AOS_ProcessSecurity function reads memory without valid bounds checking when parsing AOS frame hashes. This issue has been patched in version 1.4.3.

Analysis

CryptoLib versions prior to 1.4.3 contain an out-of-bounds read vulnerability in the Crypto_AOS_ProcessSecurity function that allows remote attackers to crash spacecraft communications systems when parsing malformed AOS frame hashes. Public exploit code exists for this vulnerability affecting cFS deployments that rely on SDLS-EP for spacecraft-to-ground station security. …

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Remediation

Within 7 days: Identify all affected systems and apply vendor patches promptly. Monitor vendor channels for patch availability.

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Priority Score

61
Low Medium High Critical
KEV: 0
EPSS: +0.0
CVSS: +41
POC: +20

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CVE-2026-21898 vulnerability details – vuln.today
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