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CVE Record

CVE-2018-5196: Alzip Stack Overflow Vulnerability

Alzip 10.76.0.0 and earlier is vulnerable to a stack overflow caused by improper bounds checking. By persuading a victim to open a specially-crafted LZH archive file, a attacker could execute arbitrary code execution.

HighCVSS 8.8Not KEV-listedUpdated
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Glexia's TakeAutomated analysishigh

Security readout for executives and security teams

Plain-English summary

This issue affects Estsoft Alzip 10.76.0.0 and earlier. A malicious LZH archive can crash or potentially take control of the application when a user opens it. Business risk is highest on endpoints where staff routinely receive or extract archives from external sources.

Executive priority

Treat this as a high-priority endpoint remediation item where Alzip is deployed. The exploit path requires user action, but successful compromise could lead to full code execution on affected systems.

Technical view

CVE-2018-5196 is a stack overflow from improper bounds checking in Alzip archive parsing. The CVSS 3.0 score is 8.8 with user interaction required. Successful exploitation could allow arbitrary code execution with high confidentiality, integrity, and availability impact.

Likely exposure

Exposure is likely limited to workstations or servers with Alzip 10.76.0.0 or earlier installed, especially where LZH archives are accepted from email, web downloads, partners, or removable media.

Exploitation context

The provided sources describe user-assisted exploitation through a specially crafted LZH archive. CISA KEV status is false, and the source bundle does not show confirmed active exploitation or public exploit availability.

Researcher notes

Evidence is sufficient for affected product, vulnerable version boundary, file type, vulnerability class, and impact. It is incomplete for detailed root cause, patch version, exploit maturity, and real-world exploitation status.

Mitigation direction

  • Inventory Alzip installations and identify versions 10.76.0.0 or earlier.
  • Apply the vendor update or current vendor guidance for Alzip.
  • Remove Alzip where there is no business requirement.
  • Restrict or quarantine unsolicited LZH archives at email and web gateways.
  • Review endpoint controls for risky archive-handler process behavior.

Validation and detection

  • Confirm installed Alzip versions across managed endpoints.
  • Check whether .lzh files are associated with Alzip.
  • Review email and web filtering policies for LZH archive handling.
  • Verify users handling external archives receive clear security guidance.
  • Track remediation status for every affected endpoint.
Prepared
Confidence
medium
Sources
4

Public sources used

Generated from the cited source records. This long-tail analysis has not been individually reviewed by a named human.

Potential ATT&CK relevance

Conservative CVE-to-ATT&CK context

These mappings and lookup hints may be relevant to the vulnerability behavior, CWE, affected product, or exposure path. Glexia-inferred context is not an official MITRE, ATT&CK, CWE, or CVE Program mapping.

ATT&CK lookup starting points

Use these exact CWE pages and searches to review the Glexia ATT&CK library from this CVE's weakness and description context.

description · low confidence lookup

Execution behavior lookup

The CVE wording references code or command execution, so execution technique review may help defensive triage. This is a Glexia inferred lookup path, not an official MITRE, ATT&CK, or CVE Program mapping.

Open ATT&CK lookup
cve · low confidence lookup

CVE-2018-5196 mapping review

Open the CVE-to-ATT&CK bridge for reviewed, inferred, or future official mappings tied to this CVE.

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Vulnerability profileCVE Program record
Severity
High
CVSS
8.8 (3.0)
Known Exploited
No
Published

Vector: CVSS:3.0/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H

Official CVE source material

CNA and ADP enrichment extracted from CVE v5

These fields come from the CVE record and ADP containers, not from Glexia's Take. They preserve time-varying source decisions such as CISA SSVC, KEV status, CVSS metrics, and provider references.

1CVSS vectors
0Timeline events
0ADP providers
3Source links

CVSS vector scores

1 official score

We collect every scored CVSS vector available in the official CNA and ADP containers. When more than one version is present, the table keeps the source vectors side by side instead of collapsing them into the highest score.

ScoreVersionSeverityVectorExploitImpactSource
8.8CVSS 3.0HighCVSS:3.0/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H2.85.9Primary CVE score

Vulnerability scoring details

Base CVSS 3.0 score

8.8High
CVSS 3.0 vector shape for CVE-2018-5196Attack VectorAttack ComplexityPrivileges RequiredUser InteractionScopeConfidentiality ImpactIntegrity ImpactAvailability Impact

Vector: CVSS:3.0/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H

Attack Vector
NetworkAdjacentLocalPhysical
Attack Complexity
LowHigh
Privileges Required
NoneLowHigh
User Interaction
NoneRequired
Scope
ChangedUnchanged
Confidentiality Impact
HighLowNone
Integrity Impact
HighLowNone
Availability Impact
HighLowNone

Source materials

Affected products

Products and packages named in the record

VendorProductVersion / packageStatus
EstsoftAlzipAlzipListed
Weakness

CWE details

No CWE listed

CWE links open Glexia weakness intelligence pages with official CWE context, developer remediation guidance, and related CVE mappings.