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Stack-based Buffer OverflowWeakness · CWE-121

CVE-2026-49033

HIGH · 7.8 CVSS v3.1 Published 2026-07-07
Mitigation only
No fix yet — a mitigation exists. There is no fixed release. A documented workaround reduces exposure in the meantime.
See remediation →
81/100
Remediation priority · High
No privileges 7 weeks old

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
The application contains a stack-based buffer overflow vulnerability that can be exploited by an attacker to execute arbitrary code.

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 · low confidence

A stack-based buffer overflow vulnerability exists in the application that allows an attacker to overwrite stack memory beyond allocated buffer boundaries. This can enable arbitrary code execution with the privileges of the affected process. The CVSS 3.1 score of 7.8 (HIGH) reflects high confidentiality and integrity impact with low attack complexity.

MitigationFix the stack-based buffer overflow by implementing proper bounds checking on all input data, using safe memory copy functions (e.g., strncpy, snprintf instead of strcpy, sprintf), and enabling compiler-based runtime protections such as stack canaries. The specific vulnerable code location and attack vector must be identified through code review or fuzzing.

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
Local
Complexity
Low
Privileges
None
User interaction
Required
Scope
Unchanged
Confidentiality
High
Integrity
High
Availability
High

CVSS:3.1/AV:L/AC:L/PR:N/UI:R/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 the affected application
    Determine which application or service is running in your environment that contains the vulnerable code. Review your deployed software inventory, running processes, and service configurations to map the CVE to a specific binary or component.
    Affected if The application containing the stack-based buffer overflow vulnerability is present in your environment and you cannot determine its version or it falls within an unknown vulnerable version range.
  2. Determine the installed version
    Locate the specific binary or library identified in step 1 and query its version. Common methods include: running '<binary> --version', checking the file properties, querying the package manager (dpkg -l, rpm -qi), or inspecting the binary metadata.
    Affected if The installed version is unknown or cannot be compared against a fixed vulnerable version range due to lack of published version data.
  3. Verify if vulnerable code paths are reachable
    Analyze the application configuration and runtime behavior to determine whether the code path containing the stack buffer overflow is actually exercised. Review input vectors, enabled features, and runtime parameters that trigger the vulnerable function.
    Affected if The vulnerable feature, function, or input processing routine is enabled and accessible to attackers, making the overflow exploitable.
  4. Inspect code for unsafe memory operations
    If source code or disassembled binary is available, search for unsafe string handling functions (strcpy, sprintf, gets, scanf without bounds) that could be vulnerable to stack buffer overflow. Use static analysis tools or decompilers to identify these patterns.
    Affected if The application uses unsafe memory copy or string functions on user-controlled data without proper bounds checking.
  5. Check for runtime security protections
    Examine whether the application was compiled with and running under security protections that mitigate stack buffer overflows, such as stack canaries (-fstack-protector), Position Independent Executable (PIE), or DEP/NX.
    Affected if The binary lacks compiler-based stack canaries and other runtime protections, making exploitation straightforward.

You are affected if the vulnerable application is present in your environment and the stack-based buffer overflow vulnerability is reachable through enabled features or input vectors without adequate runtime protections.

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

Fix the stack-based buffer overflow by implementing proper bounds checking on all input data, using safe memory copy functions (e.g., strncpy, snprintf instead of strcpy, sprintf), and enabling compiler-based runtime protections such as stack canaries. The specific vulnerable code location and attack vector must be identified through code review or fuzzing.

Have this fixed Scoped from the published advisory
  • Consultation8.0 h
  • Implementation16.0 h
  • Testing12.0 h
  • Review / QA8.0 h
44.0 hours of engineering $7,720
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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-2026-49033 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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