Authenticated denial of service via unchecked NatBind copy
Published Apr 13, 2026 · Updated Apr 13, 2026
Buffer overflow in UTT HiPER 1200GW 2.5.3-170306 allows remote authenticated users to interrupt service via a crafted NatBind value. The formNatStaticMap handler passes attacker-controlled NatBind data to strcpy without enforcing the destination buffer's bounds. Administrative web credentials and network access are required; the published proof of concept demonstrates denial of service, not code execution.
Summary
What happened
Buffer overflow in UTT HiPER 1200GW 2.5.3-170306 allows remote authenticated users to interrupt service via a crafted NatBind value. The formNatStaticMap handler passes attacker-controlled NatBind data to strcpy without enforcing the destination buffer's bounds. Administrative web credentials and network access are required; the published proof of concept demonstrates denial of service, not code execution.
The record
- CVE
- CVE-2026-6186
- Published
- Apr 13, 2026
- Updated
- Apr 13, 2026
- Vendor
- Shanghai Aitai Technology Co., Ltd.
- Product
- HiPER 1200GW
- Classifications
- CWE-119, CWE-120, T1499
- Attack vector
- network
- Privileges
- authenticated
Timeline
How it unfolded
- Apr 13, 2026CVE publishedPublication date reported by the CVE source.
- Apr 13, 2026Record updatedLatest update available in the CVE record.
Exploitability
Present is not the same as exploitable
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Is a vulnerable build present?
Compare these published version ranges with your installed build and any vendor patches.
- Affected versionversion=2.5.3-170306
What conditions does exploitation require?
What is affected?
Published CVSS scores
CVSS describes severity. EPSS estimates exploitation probability.
Attacks
What attackers are doing with it
Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.
Weakness, pattern, technique
Public exploit references
- HiPER 1200GW formNatStaticMap NatBind proof of conceptproof of concept · unverified
Labels summarize the accepted research assessment. They do not indicate a test against your environment.
Technologies
Your stack
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Your stack
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