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Memory Buffer Bounds ErrorWeakness · CWE-119

CVE-2025-8760

CRITICAL · 9.8 CVSS v3.1 Published 2025-08-13
Mitigation only
No fix yet — a mitigation exists. There is no fixed release. A documented workaround reduces exposure in the meantime.
See remediation →
100/100
Remediation priority · Urgent
Remotely reachable No privileges Zero-click

Official description Straight from the sourceThe vendor's or NVD's own wording, published unedited. Authoritative, but often terse — it says what broke, rarely what to do.

NVD · unedited
A vulnerability was identified in INSTAR 2K+ and 4K 3.11.1 Build 1124. This affects the function base64_decode of the component fcgi_server. The manipulation of the argument Authorization leads to buffer overflow. It is possible to initiate the attack remotely.

Technical summary Written by usOur analysis, written from the advisory, the CVSS vector and the affected-version data. It adds context the advisory leaves out, and never invents facts that are not in the source.

dbcve analysis · moderate confidence

Buffer overflow vulnerability in the base64_decode function within the fcgi_server component of INSTAR 2K+ and 4K IP cameras (firmware 3.11.1 Build 1124). The vulnerability is triggered via a specially crafted Authorization header, allowing remote attackers to potentially execute arbitrary code due to improper bounds checking during base64 decoding.

MitigationApply vendor-provided firmware patch when available; until then, restrict network access to camera management interfaces via firewall rules or network segmentation to limit remote exploitation vector.

Verify against the referenced sources before acting — the references below are authoritative for this CVE, this summary is not.

CVSS breakdown How the score is builtThe industry scoring standard. It rates how the flaw is reached, what it takes to exploit, and what an attacker gains — the score is derived from those, not the other way round.

From the vector
Attack vector
Network
Complexity
Low
Privileges
None
User interaction
None
Scope
Unchanged
Confidentiality
High
Integrity
High
Availability
High

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

Am I affected? How to checkSteps we derive from the advisory and the affected-version data, so you can decide whether this CVE reaches your setup. They are a guide, not a scan — your own configuration is the authority.

dbcve checks

Work through these to decide whether this CVE applies to you.

  1. Identify camera model
    Access the camera web interface or API and check the device information page to confirm it is an INSTAR 2K+ or 4K series IP camera
    Affected if The camera is an INSTAR 2K+ or 4K model
  2. Check firmware version
    Navigate to the camera settings or system information page to view the installed firmware version and build number
    Affected if Firmware version is 3.11.1 Build 1124
  3. Verify fcgi_server component presence
    Check the camera system or process list via telnet/ssh or examine the firmware filesystem for the fcgi_server binary
    Affected if The fcgi_server component is present on the device
  4. Assess network exposure of management interface
    Determine if the camera web interface and fcgi_server are accessible from external networks by checking firewall rules, port forwarding, or network segmentation configurations
    Affected if The camera management interface is reachable from untrusted networks

The environment is affected if the camera runs firmware 3.11.1 Build 1124 and the fcgi_server component is network-accessible, allowing specially crafted Authorization headers to reach the vulnerable base64_decode function.

Generated from the published advisory. Verify against your own configuration.

Check your environment

Paste your version and any relevant configuration and it will be compared against the affected criteria above. Do not include secrets or credentials.

AI-assisted, checked against the advisory. Informational, not a guarantee.

Remediation Closing itWhat it takes to close this. Where a vendor fix exists we point at it; where none exists we say so plainly, and can build one. Effort estimates are scoped from the advisory, not from your codebase.

From vendor data
Mitigation available No clean upgrade yet — mitigate in the meantime
Mitigation

Apply vendor-provided firmware patch when available; until then, restrict network access to camera management interfaces via firewall rules or network segmentation to limit remote exploitation vector.

Have this fixed Scoped from the published advisory
  • Consultation4.0 h
  • Implementation6.0 h
  • Testing4.0 h
  • Review / QA2.0 h
16.0 hours of engineering $2,840
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References Go to the primary sourcePrimary sources — vendor advisories, patches and trackers. Where our summary and a reference disagree, the reference wins.

Primary sources

Practitioner notes

Contributed

Peer-ranked notes from engineers who’ve handled CVE-2025-8760 in production — separate from our analysis above.

No notes yet

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What this is

A place for practitioners to share what actually worked: a mitigation you’ve tested, a configuration change, a version- or environment-specific caveat, or a link to a verified patch. The most useful notes rise to the top as peers upvote them, so the signal stays high.

What belongs here
  • Verified mitigations, workarounds, and config changes
  • Version or environment caveats, and links to real fixes
  • No weaponised exploit code, or anything meant to cause harm
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