How severe is CVE-2016-8276?

CVE-2016-8276 has a CVSS 3.x base score of 9.8, rated critical severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is high, integrity high, and availability high.

Is CVE-2016-8276 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 6% (92nd percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2016-8276?

CVE-2016-8276 primarily affects Huawei Usg2100. In total, 8 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.

How do I fix CVE-2016-8276?

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

When was CVE-2016-8276 published?

CVE-2016-8276 was published on 2016-10-03 and last updated on 2026-06-17.

CVE-2016-8276

CVE-2016-8276 is a critical-severity vulnerability in Huawei Usg2100 with a CVSS 3.x base score of 9.8. 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-119.

Key facts

Severity: Critical (CVSS 3.x base score 9.8)
CVSS v2: 9.3
EPSS exploit prediction: 6% (92nd percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-119
Affected product: Huawei Usg2100
Published: 2016-10-03
Last modified: 2026-06-17

Description

Buffer overflow in the Point-to-Point Protocol over Ethernet (PPPoE) module in Huawei USG2100, USG2200, USG5100, and USG5500 unified security gateways with software before V300R001C10SPC600, when CHAP authentication is configured on the server, allows remote attackers to cause a denial of service (server restart) or execute arbitrary code via crafted packets sent during authentication.

Frequently asked questions

What is CVE-2016-8276?: Buffer overflow in the Point-to-Point Protocol over Ethernet (PPPoE) module in Huawei USG2100, USG2200, USG5100, and USG5500 unified security gateways with software before V300R001C10SPC600, when CHAP authentication is configured on the server, allows remote attackers to cause a denial of service (server restart) or execute arbitrary code via crafted packets sent during authentication.
How severe is CVE-2016-8276?: CVE-2016-8276 has a CVSS 3.x base score of 9.8, rated critical severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is high, integrity high, and availability high.
Is CVE-2016-8276 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 6% (92nd percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2016-8276?: CVE-2016-8276 primarily affects Huawei Usg2100. In total, 8 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.
How do I fix CVE-2016-8276?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its critical severity, prioritise patching exposed systems.
When was CVE-2016-8276 published?: CVE-2016-8276 was published on 2016-10-03 and last updated on 2026-06-17.

References

Affected products (8)

cpe:2.3:a:huawei:usg2100:v300r001c00:*:*:*:*:*:*:*
cpe:2.3:a:huawei:usg2100:v300r001c10:*:*:*:*:*:*:*
cpe:2.3:a:huawei:usg2200:v300r001c00:*:*:*:*:*:*:*
cpe:2.3:a:huawei:usg2200:v300r001c10:*:*:*:*:*:*:*
cpe:2.3:a:huawei:usg5100:v300r001c00:*:*:*:*:*:*:*
cpe:2.3:a:huawei:usg5100:v300r001c10:*:*:*:*:*:*:*
cpe:2.3:a:huawei:usg5500:v300r001c00:*:*:*:*:*:*:*
cpe:2.3:a:huawei:usg5500:v300r001c10:*:*:*:*:*:*:*

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