Code execution via unbounded WebSocket key copy
Published Jul 2, 2026 · Updated Jul 2, 2026
Stack-based buffer overflow in GeoVision GeoWebPlayer 1.1.1.0 allows remote attackers to execute code via a crafted WebSocket message. The connectionInfo handler copies the attacker-controlled JSON key into the 17-byte key_blob stack buffer byte by byte without a length check. Exploitation requires user interaction with a malicious webpage that sends the message to the localhost WebSocket server.
Summary
What happened
Stack-based buffer overflow in GeoVision GeoWebPlayer 1.1.1.0 allows remote attackers to execute code via a crafted WebSocket message. The connectionInfo handler copies the attacker-controlled JSON key into the 17-byte key_blob stack buffer byte by byte without a length check. Exploitation requires user interaction with a malicious webpage that sends the message to the localhost WebSocket server.
The record
- CVE
- CVE-2026-57277
- Published
- Jul 2, 2026
- Updated
- Jul 2, 2026
- Vendor
- GeoVision
- Product
- GeoWebPlayer
- Classifications
- CWE-120, T1203
- Attack vector
- network
- Privileges
- unauthenticated
Timeline
How it unfolded
- Jul 2, 2026CVE publishedPublication date reported by the CVE source.
- Jul 2, 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=V1.1.1.0
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
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Technologies
Your stack
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Your stack
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