CVE-2016-8276

CRITICAL

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 C...

Affects 8 products across 1 vendor.

CVSS 3.09.8
EPSS5.6%
Percentile93th
PatchUnknown
CVSS Vector — Plain English Remotely exploitable over the network, low complexity, no authentication required, no user interaction needed, impact contained to the vulnerable component, full confidentiality impact, full integrity impact, full availability impact.
CWE Weakness Definitions
CWE-119: Improper Restriction of Operations within Memory Buffer

Parent class for buffer-related vulnerabilities where operations exceed buffer boundaries.

Related Attack Patterns (CAPEC)
CAPEC-8 Buffer Overflow in an API Call
via CWE-119
CAPEC-9 Buffer Overflow in Local Command-Line Utilities
via CWE-119
CAPEC-10 Buffer Overflow via Environment Variables
via CWE-119
CAPEC-14 Client-side Injection-induced Buffer Overflow
via CWE-119
CAPEC-24 Filter Failure through Buffer Overflow
via CWE-119
Show all 12

Mapping is CWE-to-CAPEC per MITRE CAPEC 3.9.

◆ AI Analysis — automated analysis, not human-reviewed

This vulnerability was disclosed in 2016. A critical vulnerability affects Huawei systems (CVE-2016-8276). No public exploit code is currently available. Isolate affected systems if patching is not feasible.

BSID: BS-2016-GLOBAL-112511-C • Model: rule-based-v1 • Confidence: MEDIUM

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Frequently Asked Questions
What is CVE-2016-8276?
This vulnerability was disclosed in 2016. A critical vulnerability affects Huawei systems (CVE-2016-8276). No public exploit code is currently available. Isolate affected systems if patching is not feasible.
What is the CVSS score for CVE-2016-8276?
CVE-2016-8276 has CVSS 9.8 (Critical). Vector: CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H. EPSS: 5.6%.
Is CVE-2016-8276 actively exploited?
No confirmed active exploitation of CVE-2016-8276 as of 2026-09-25.
How do I remediate CVE-2016-8276?
Priority: MEDIUM. Advisory: http://www.huawei.com/en/psirt/security-advisories/huawei-sa-20160914-01-usg-en PSIRT: [email protected]
What systems are affected by CVE-2016-8276?
CVE-2016-8276 affects Huawei Usg2100, Usg2200, Usg5100, Usg5500.
Vulnerability Details
CVE IDCVE-2016-8276
BSIDBS-2016-GLOBAL-112511-C BreachSpider Global ID
CVSS VectorCVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Published2016-10-03
Last Modified2026-06-17
ICS Relevance15%
Weakness (CWE)
Improper Restriction of Operations within Memory Buffer
Domains
NETWORK-INFRA
SourceNVD
Official 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.

Source: NIST NVD / MITRE CVE Database

Attack Vector Analysis — CITED Relevance

Vulnerability details: 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. CVSS vector: CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H.

Exploitation Likelihood: LOW

Affected Products
VendorProductAffected Versions
Huawei Usg2100 (device & firmware) v300r001c00 v300r001c10
Huawei Usg2200 (device & firmware) v300r001c00 v300r001c10
Huawei Usg5100 (device & firmware) v300r001c00 v300r001c10
Huawei Usg5500 (device & firmware) v300r001c00 v300r001c10
Remediation
View Vendor Advisory →

Remediation Priority: MEDIUM

Vendor PSIRT: [email protected]
Threat Intelligence
● Threat Intelligence Validated: October 2026 | Threat Age: 3664 Days
CISA known-exploitedNot in KEV catalog
Public ExploitNot confirmed
PoC CodeNot confirmed
AI Enrichment Record — provenance & audit hash
Modelrule-based-v1
ConfidenceMEDIUM
Enriched At2026-05-24
SHA-512 Audit Hashf8a6e40ad251f1f1fea3b8590614b05707a18ab5b1ba476454484f5909e0a76983160fb3090f5c2c3efc83a35f01972108b34ce28733d008b994244c8b3df32a
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