How severe is CVE-2026-21837?

CVE-2026-21837 has a CVSS 3.x base score of 8.8, rated high severity. It is exploitable over network with low attack complexity, requires low privileges and no user interaction. Impact on confidentiality is high, integrity high, and availability high.

Is CVE-2026-21837 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (56th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2026-21837?

CVE-2026-21837 primarily affects Hcltech Digital Experience. In total, 67 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.

How do I fix CVE-2026-21837?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its high severity, prioritise patching exposed systems.

Does CVE-2026-21837 have an EU (EUVD) identifier?

Yes. CVE-2026-21837 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2026-34786.

When was CVE-2026-21837 published?

CVE-2026-21837 was published on 2026-06-05 and last updated on 2026-06-17.

CVE-2026-21837

CVE-2026-21837 is a high-severity vulnerability in Hcltech Digital Experience with a CVSS 3.x base score of 8.8. 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-78.

Key facts

Severity: High (CVSS 3.x base score 8.8)
CVSS v4: 8.7
EPSS exploit prediction: 1% (56th percentile)
Actively exploited: Not listed in CISA KEV
EU (EUVD) id: EUVD-2026-34786
Weakness: CWE-78
Affected product: Hcltech Digital Experience
Published: 2026-06-05
Last modified: 2026-06-17

Description

HCL Digital Experience is affected by an OS command injection vulnerability in the Digital Asset Management API. An attacker may execute arbitrary operating system commands, typically inheriting the privileges of the vulnerable application, which could possibly lead to a complete system takeover and data compromise.

Frequently asked questions

What is CVE-2026-21837?: HCL Digital Experience is affected by an OS command injection vulnerability in the Digital Asset Management API. An attacker may execute arbitrary operating system commands, typically inheriting the privileges of the vulnerable application, which could possibly lead to a complete system takeover and data compromise.
How severe is CVE-2026-21837?: CVE-2026-21837 has a CVSS 3.x base score of 8.8, rated high severity. It is exploitable over network with low attack complexity, requires low privileges and no user interaction. Impact on confidentiality is high, integrity high, and availability high.
Is CVE-2026-21837 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (56th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2026-21837?: CVE-2026-21837 primarily affects Hcltech Digital Experience. In total, 67 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.
How do I fix CVE-2026-21837?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its high severity, prioritise patching exposed systems.
Does CVE-2026-21837 have an EU (EUVD) identifier?: Yes. CVE-2026-21837 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2026-34786.
When was CVE-2026-21837 published?: CVE-2026-21837 was published on 2026-06-05 and last updated on 2026-06-17.

References

https://support.hcl-software.com/csm?id=kb_article&sysparm_article=KB0130849

Affected products (67)

cpe:2.3:a:hcltech:digital_experience:9.5:-:*:*:*:*:*:*
cpe:2.3:a:hcltech:digital_experience:9.5:cf17:*:*:*:*:*:*
cpe:2.3:a:hcltech:digital_experience:9.5:cf171:*:*:*:*:*:*
cpe:2.3:a:hcltech:digital_experience:9.5:cf172:*:*:*:*:*:*
cpe:2.3:a:hcltech:digital_experience:9.5:cf173:*:*:*:*:*:*
cpe:2.3:a:hcltech:digital_experience:9.5:cf18:*:*:*:*:*:*
cpe:2.3:a:hcltech:digital_experience:9.5:cf181:*:*:*:*:*:*
cpe:2.3:a:hcltech:digital_experience:9.5:cf182:*:*:*:*:*:*
cpe:2.3:a:hcltech:digital_experience:9.5:cf183:*:*:*:*:*:*
cpe:2.3:a:hcltech:digital_experience:9.5:cf184:*:*:*:*:*:*
cpe:2.3:a:hcltech:digital_experience:9.5:cf19:*:*:*:*:*:*
cpe:2.3:a:hcltech:digital_experience:9.5:cf191:*:*:*:*:*:*
cpe:2.3:a:hcltech:digital_experience:9.5:cf192:*:*:*:*:*:*
cpe:2.3:a:hcltech:digital_experience:9.5:cf193:*:*:*:*:*:*
cpe:2.3:a:hcltech:digital_experience:9.5:cf194:*:*:*:*:*:*
cpe:2.3:a:hcltech:digital_experience:9.5:cf195:*:*:*:*:*:*
cpe:2.3:a:hcltech:digital_experience:9.5:cf196:*:*:*:*:*:*
cpe:2.3:a:hcltech:digital_experience:9.5:cf197:*:*:*:*:*:*
cpe:2.3:a:hcltech:digital_experience:9.5:cf198:*:*:*:*:*:*
cpe:2.3:a:hcltech:digital_experience:9.5:cf199:*:*:*:*:*:*
cpe:2.3:a:hcltech:digital_experience:9.5:cf200:*:*:*:*:*:*
cpe:2.3:a:hcltech:digital_experience:9.5:cf201:*:*:*:*:*:*
cpe:2.3:a:hcltech:digital_experience:9.5:cf202:*:*:*:*:*:*
cpe:2.3:a:hcltech:digital_experience:9.5:cf203:*:*:*:*:*:*
cpe:2.3:a:hcltech:digital_experience:9.5:cf204:*:*:*:*:*:*
cpe:2.3:a:hcltech:digital_experience:9.5:cf205:*:*:*:*:*:*
cpe:2.3:a:hcltech:digital_experience:9.5:cf206:*:*:*:*:*:*
cpe:2.3:a:hcltech:digital_experience:9.5:cf207:*:*:*:*:*:*
cpe:2.3:a:hcltech:digital_experience:9.5:cf208:*:*:*:*:*:*
cpe:2.3:a:hcltech:digital_experience:9.5:cf209:*:*:*:*:*:*
cpe:2.3:a:hcltech:digital_experience:9.5:cf210:*:*:*:*:*:*
cpe:2.3:a:hcltech:digital_experience:9.5:cf211:*:*:*:*:*:*
cpe:2.3:a:hcltech:digital_experience:9.5:cf212:*:*:*:*:*:*
cpe:2.3:a:hcltech:digital_experience:9.5:cf213:*:*:*:*:*:*
cpe:2.3:a:hcltech:digital_experience:9.5:cf214:*:*:*:*:*:*
cpe:2.3:a:hcltech:digital_experience:9.5:cf215:*:*:*:*:*:*
cpe:2.3:a:hcltech:digital_experience:9.5:cf216:*:*:*:*:*:*
cpe:2.3:a:hcltech:digital_experience:9.5:cf217:*:*:*:*:*:*
cpe:2.3:a:hcltech:digital_experience:9.5:cf218:*:*:*:*:*:*
cpe:2.3:a:hcltech:digital_experience:9.5:cf219:*:*:*:*:*:*

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