What is CVE-2016-6839?

CVE-2016-6839 is a medium-severity vulnerability in Huawei Fusionaccess, classified under HTTP Response Splitting. CVSS score: 6.1/10. Published 2016-09-07.

How severe is CVE-2016-6839?

Medium severity. CVSS v3 base score is 6.1 out of 10.

Vulnerability in Huawei Fusionaccess

CVE-2016-6839

CRLF injection vulnerability in Huawei FusionAccess before V100R006C00 allows remote attackers to inject arbitrary HTTP headers and conduct HTTP response splitting attacks via unspecified vectors.

Published 2016-09-07 · last modified 2026-06-17.

CVSS v3 metric

CVSS v3 base score 6.1 (Medium). Vector: CVSS:3.0/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N.

EPSS exploit prediction

EPSS: 0.008 (54.4th percentile), scored 2026-10-01.

Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 54th percentile — 54.4% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS over last 30 days · oldest: 0.008 · newest: 0.008 · change: 0.000

Affected products

Huawei Fusionaccess — versions v100r005c10, v100r005c20, v100r005c30

Weakness classification (CWE)

CWE-113 — HTTP Response Splitting

References

www.huawei.com/en/psirt/security-advisories/huawei-sa-20160817-01-fusionaccess-… (Vendor Advisory)
www.securityfocus.com/bid/92502 (VDB Entry, Third Party Advisory, vdb-entry)

Frequently asked questions

What is CVE-2016-6839?: CVE-2016-6839 is a medium-severity vulnerability in Huawei Fusionaccess, classified under HTTP Response Splitting. CVSS score: 6.1/10. Published 2016-09-07.
How severe is CVE-2016-6839?: Medium severity. CVSS v3 base score is 6.1 out of 10.