How severe is CVE-2016-6518?

CVE-2016-6518 has a CVSS 3.x base score of 7.5, rated high severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is none, integrity none, and availability high.

Is CVE-2016-6518 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (62nd percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2016-6518?

CVE-2016-6518 primarily affects Huawei S5300 Firmware. In total, 50 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.

How do I fix CVE-2016-6518?

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.

When was CVE-2016-6518 published?

CVE-2016-6518 was published on 2016-09-26 and last updated on 2026-06-17.

CVE-2016-6518

CVE-2016-6518 is a high-severity vulnerability in Huawei S5300 Firmware with a CVSS 3.x base score of 7.5. 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-399.

Key facts

Severity: High (CVSS 3.x base score 7.5)
CVSS v2: 5.0
EPSS exploit prediction: 1% (62nd percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-399
Affected product: Huawei S5300 Firmware
Published: 2016-09-26
Last modified: 2026-06-17

Description

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.

Frequently asked questions

What is 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.
How severe is CVE-2016-6518?: CVE-2016-6518 has a CVSS 3.x base score of 7.5, rated high severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is none, integrity none, and availability high.
Is CVE-2016-6518 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (62nd percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2016-6518?: CVE-2016-6518 primarily affects Huawei S5300 Firmware. In total, 50 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.
How do I fix CVE-2016-6518?: 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.
When was CVE-2016-6518 published?: CVE-2016-6518 was published on 2016-09-26 and last updated on 2026-06-17.

References

Affected products (50)

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

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Other CWE-399 (Resource Management Errors) vulnerabilities

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CVE-2015-0339 — Critical (CVSS 10.0): Adobe Flash Player before 13.0.0.277 and 14.x through 17.x before 17.0.0.134 on Windows and OS X and before…
CVE-2015-0335 — Critical (CVSS 10.0): Adobe Flash Player before 13.0.0.277 and 14.x through 17.x before 17.0.0.134 on Windows and OS X and before…
CVE-2015-0333 — Critical (CVSS 10.0): Adobe Flash Player before 13.0.0.277 and 14.x through 17.x before 17.0.0.134 on Windows and OS X and before…
CVE-2014-4121 — Critical (CVSS 10.0): Microsoft .NET Framework 2.0 SP2, 3.5, 3.5.1, 4, 4.5, 4.5.1, and 4.5.2 does not properly parse internationalized…
CVE-2014-0560 — Critical (CVSS 10.0): Use-after-free vulnerability in Adobe Reader and Acrobat 10.x before 10.1.12 and 11.x before 11.0.09 on Windows and OS…

Browse all CWE-399 (Resource Management Errors) vulnerabilities →