Is there a public exploit for CVE-2026-21850?

No public exploit for CVE-2026-21850 was found in Exploit-DB, Metasploit, Nuclei templates or public proof-of-concept repositories. That is an absence of evidence rather than proof that none exists.

How severe is CVE-2026-21850?

CVE-2026-21850 scores CVSS 6.5 (v3.1), rated medium.

What does CVE-2026-21850 affect?

CVE-2026-21850 affects HCL Software HCL AION.

6.5 Medium

HCL AION is affected by a vulnerability where user-controlled input could be included in HTTP response headers without proper…

CVE-2026-21850

HCL AION is affected by a vulnerability where user-controlled input could be included in HTTP response headers without proper neutralization of CR/LF characters. This may allow an attacker to inject headers or split responses, potentially resulting in unintended behavior or security impact under certain conditions.

Assessment

CVSS: 6.5 (v3.1)
Severity: Medium
Known exploited: Not listed in CISA KEV
Exploit availability: Nothing found in Exploit-DB, Metasploit, Nuclei or public PoC repositories
Published: 6 November 2026
Last updated: 6 November 2026
Affected: HCL Software · HCL AION
Assigner: HCL

CVSS vectorCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:N

At the source

EUVD (ENISA)

References

https://support.hcl-software.com/csm?id=kb_article&sysparm_article=KB0135118

Community proofs of concept

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