CVE-2016-6518

Memory leak in Huawei S9300, S5300, S5700, S6700, S7700, S9700, and S12700 devices allows remote attackers to cause a denial of service (memory consumption and restart) via a large number of malformed packets.

Published: 2016-09-26 Last update: 2026-06-16 Assigner: [email protected] Source: [email protected]
NVD Status：Modified，CVE State: published
View at NVD, CVE.org, EUVD

CVE-2016-6518 is rated Moderate Risk (52.2/100): CVSS High severity, with medium exploitation likelihood (EPSS 1.10%). Review affected assets and schedule remediation.

Risk is dynamic; we continuously reassess and refresh what is shown on this page as upstream context changes.

Exploit prediction scoring system (EPSS) score for CVE-2016-6518

EPSS lead: Daily EPSS estimates relative likelihood of exploitation; percentile ranks this CVE among scored vulnerabilities (higher = more severe relative rank).

# Date Old EPSS score New EPSS score Delta (New - Old)
1 2026-06-15 0.32% 1.10% +0.77%
2 2025-03-30 0.59% 0.32% -0.27%
3 2025-03-29 — 0.59% —

Full EPSS history (7 records total)

Common vulnerability scoring system (CVSS) metrics for CVE-2016-6518

CVSS metrics for this CVE.

Base score Version Severity Vector Exploitability Impact Score source
7.5 3.0 HIGH
CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H Click to expand
Attack vector (AV:N)
Could be attacked over the internet or any normal routed network—not just someone sitting at the machine.
Attack complexity (AC:L)
Once they can reach the bug, pulling it off is straightforward—no weird race conditions or rare setup.
Privileges required (PR:N)
No account or special rights needed—anonymous or random user is enough.
User interaction (UI:N)
Nobody has to click “OK” or open a trap file; it can work without a victim helping.
Scope (S:U)
Damage stays in the same “trust bubble” as the broken component—no big spill into unrelated systems.
Confidentiality (C:N)
Doesn’t really leak secrets in a meaningful way.
Integrity (I:N)
Data isn’t meaningfully altered or forged.
Availability (A:H)
Could take the service down hard or make it unusable for people who depend on it.
 3.9 3.6 [email protected]
5.0 2.0 MEDIUM
AV:N/AC:L/Au:N/C:N/I:N/A:P Click to expand
Access vector (AV:N)
Can be exploited remotely over network reachability.
Access complexity (AC:L)
Exploitation conditions are straightforward and predictable.
Authentication (AU:N)
No authentication is required.
Confidentiality impact (C:N)
No confidentiality impact.
Integrity impact (I:N)
No integrity impact.
Availability impact (A:P)
Partial availability impact.
 10.0 2.9 [email protected]

Weakness enumeration for CVE-2016-6518

Affected software / configurations for CVE-2016-6518

Vendor Product Version Raw CPE
huawei s5300_firmware v200r001c00 cpe:2.3:o:huawei:s5300_firmware:v200r001c00:*:*:*:*:*:*:*
huawei s5300_firmware v200r002c00 cpe:2.3:o:huawei:s5300_firmware:v200r002c00:*:*:*:*:*:*:*
huawei s5300_firmware v200r003c00 cpe:2.3:o:huawei:s5300_firmware:v200r003c00:*:*:*:*:*:*:*
huawei s5300_firmware v200r005c00 cpe:2.3:o:huawei:s5300_firmware:v200r005c00:*:*:*:*:*:*:*
huawei s5300_firmware v200r005c01 cpe:2.3:o:huawei:s5300_firmware:v200r005c01:*:*:*:*:*:*:*
huawei s5300_firmware v200r005c02 cpe:2.3:o:huawei:s5300_firmware:v200r005c02:*:*:*:*:*:*:*
huawei s5300_firmware v200r006c00 cpe:2.3:o:huawei:s5300_firmware:v200r006c00:*:*:*:*:*:*:*
huawei s5300_firmware v200r007c00 cpe:2.3:o:huawei:s5300_firmware:v200r007c00:*:*:*:*:*:*:*
huawei s5300_firmware v200r008c00 cpe:2.3:o:huawei:s5300_firmware:v200r008c00:*:*:*:*:*:*:*
huawei s12700_firmware v200r005c00 cpe:2.3:o:huawei:s12700_firmware:v200r005c00:*:*:*:*:*:*:*
huawei s12700_firmware v200r006c00 cpe:2.3:o:huawei:s12700_firmware:v200r006c00:*:*:*:*:*:*:*
huawei s12700_firmware v200r008c00 cpe:2.3:o:huawei:s12700_firmware:v200r008c00:*:*:*:*:*:*:*
huawei s6300_firmware v200r001c00 cpe:2.3:o:huawei:s6300_firmware:v200r001c00:*:*:*:*:*:*:*
huawei s6300_firmware v200r002c00 cpe:2.3:o:huawei:s6300_firmware:v200r002c00:*:*:*:*:*:*:*
huawei s6300_firmware v200r003c00 cpe:2.3:o:huawei:s6300_firmware:v200r003c00:*:*:*:*:*:*:*
huawei s6300_firmware v200r005c00 cpe:2.3:o:huawei:s6300_firmware:v200r005c00:*:*:*:*:*:*:*
huawei s6300_firmware v200r005c01 cpe:2.3:o:huawei:s6300_firmware:v200r005c01:*:*:*:*:*:*:*
huawei s6300_firmware v200r005c02 cpe:2.3:o:huawei:s6300_firmware:v200r005c02:*:*:*:*:*:*:*
huawei s6300_firmware v200r008c00 cpe:2.3:o:huawei:s6300_firmware:v200r008c00:*:*:*:*:*:*:*
huawei s7700_firmware v200r001c00 cpe:2.3:o:huawei:s7700_firmware:v200r001c00:*:*:*:*:*:*:*
huawei s7700_firmware v200r002c00 cpe:2.3:o:huawei:s7700_firmware:v200r002c00:*:*:*:*:*:*:*
huawei s7700_firmware v200r003c00 cpe:2.3:o:huawei:s7700_firmware:v200r003c00:*:*:*:*:*:*:*
huawei s7700_firmware v200r005c00 cpe:2.3:o:huawei:s7700_firmware:v200r005c00:*:*:*:*:*:*:*
huawei s7700_firmware v200r006c00 cpe:2.3:o:huawei:s7700_firmware:v200r006c00:*:*:*:*:*:*:*
huawei s7700_firmware v200r008c00 cpe:2.3:o:huawei:s7700_firmware:v200r008c00:*:*:*:*:*:*:*
huawei s5700_firmware v200r001c00 cpe:2.3:o:huawei:s5700_firmware:v200r001c00:*:*:*:*:*:*:*
huawei s5700_firmware v200r001c01 cpe:2.3:o:huawei:s5700_firmware:v200r001c01:*:*:*:*:*:*:*
huawei s5700_firmware v200r002c00 cpe:2.3:o:huawei:s5700_firmware:v200r002c00:*:*:*:*:*:*:*
huawei s5700_firmware v200r003c00 cpe:2.3:o:huawei:s5700_firmware:v200r003c00:*:*:*:*:*:*:*
huawei s5700_firmware v200r003c02 cpe:2.3:o:huawei:s5700_firmware:v200r003c02:*:*:*:*:*:*:*
huawei s5700_firmware v200r005c00 cpe:2.3:o:huawei:s5700_firmware:v200r005c00:*:*:*:*:*:*:*
huawei s5700_firmware v200r006c00 cpe:2.3:o:huawei:s5700_firmware:v200r006c00:*:*:*:*:*:*:*
huawei s5700_firmware v200r008c00 cpe:2.3:o:huawei:s5700_firmware:v200r008c00:*:*:*:*:*:*:*
huawei s6700_firmware v200r001c00 cpe:2.3:o:huawei:s6700_firmware:v200r001c00:*:*:*:*:*:*:*
huawei s6700_firmware v200r001c01 cpe:2.3:o:huawei:s6700_firmware:v200r001c01:*:*:*:*:*:*:*
huawei s6700_firmware v200r002c00 cpe:2.3:o:huawei:s6700_firmware:v200r002c00:*:*:*:*:*:*:*
huawei s6700_firmware v200r003c00 cpe:2.3:o:huawei:s6700_firmware:v200r003c00:*:*:*:*:*:*:*
huawei s6700_firmware v200r008c00 cpe:2.3:o:huawei:s6700_firmware:v200r008c00:*:*:*:*:*:*:*
huawei s9700_firmware v200r001c00 cpe:2.3:o:huawei:s9700_firmware:v200r001c00:*:*:*:*:*:*:*
huawei s9700_firmware v200r001c01 cpe:2.3:o:huawei:s9700_firmware:v200r001c01:*:*:*:*:*:*:*
huawei s9700_firmware v200r002c00 cpe:2.3:o:huawei:s9700_firmware:v200r002c00:*:*:*:*:*:*:*
huawei s9700_firmware v200r003c00 cpe:2.3:o:huawei:s9700_firmware:v200r003c00:*:*:*:*:*:*:*
huawei s9700_firmware v200r005c00 cpe:2.3:o:huawei:s9700_firmware:v200r005c00:*:*:*:*:*:*:*
huawei s9700_firmware v200r006c00 cpe:2.3:o:huawei:s9700_firmware:v200r006c00:*:*:*:*:*:*:*
huawei s9700_firmware v200r008c00 cpe:2.3:o:huawei:s9700_firmware:v200r008c00:*:*:*:*:*:*:*
huawei s9300_firmware v200r001c00 cpe:2.3:o:huawei:s9300_firmware:v200r001c00:*:*:*:*:*:*:*
huawei s9300_firmware v200r003c00 cpe:2.3:o:huawei:s9300_firmware:v200r003c00:*:*:*:*:*:*:*
huawei s9300_firmware v200r005c00 cpe:2.3:o:huawei:s9300_firmware:v200r005c00:*:*:*:*:*:*:*
huawei s9300_firmware v200r006c00 cpe:2.3:o:huawei:s9300_firmware:v200r006c00:*:*:*:*:*:*:*
huawei s9300_firmware v200r008c00 cpe:2.3:o:huawei:s9300_firmware:v200r008c00:*:*:*:*:*:*:*

References for CVE-2016-6518

cvelogic Threat Intelligence