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CVE Record

CVE-2026-85672: zerox 1.1.20 OS Command Injection via Document URL File Extension

zerox 1.1.20 contains an OS command injection vulnerability in the file download mechanism where the temporary file extension derived from document URLs is interpolated unsanitized into shell commands executed by poppler utilities. Attackers can craft document URLs with malicious file extensions containing command substitution syntax to execute arbitrary OS commands before document processing occurs.

CriticalCVSS 9.8Not KEV-listedUpdated
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Glexia's TakeAutomated analysiscritical

Security readout for executives and security teams

Plain-English summary

A malicious document URL may cause zerox 1.1.20 to run attacker-chosen operating-system commands on the processing server. A successful attack could expose data, alter systems, or interrupt service without authentication or user interaction. Risk depends on whether an application accepts attacker-controlled document URLs.

Executive priority

Prioritize immediate exposure assessment for internet-facing document-processing systems. If zerox 1.1.20 receives untrusted URLs, reduce reachability and privileges now while awaiting or confirming vendor remediation. Absence from KEV is not evidence that exploitation is impossible.

Technical view

The temporary file extension is derived from a document URL and reportedly inserted without sanitization into shell commands invoking Poppler utilities. A crafted extension containing shell command-substitution syntax can trigger arbitrary command execution before document processing. This is classified as CWE-78 with CVSS 3.1 score 9.8.

Likely exposure

Highest exposure exists where zerox 1.1.20 processes document URLs supplied by unauthenticated or untrusted users. Internet-facing upload, conversion, OCR, or document-ingestion services warrant urgent review. The bundle's affected-version metadata conflicts with its title and description, so exact version scope requires vendor confirmation.

Exploitation context

The supplied record does not identify CISA KEV listing or provide evidence of active exploitation. However, the reported network-accessible, low-complexity path requires neither privileges nor user interaction. Treat reachable deployments as high risk while distinguishing theoretical exploitability from confirmed attacks.

Researcher notes

The core claim is command injection through URL-derived extension handling before Poppler processing. The bundle names 1.1.20, but its structured affected entry lists version "0" with default status unaffected. Researchers should preserve this discrepancy, validate vulnerable tags or commits, and avoid broadening the affected range without authoritative confirmation.

Mitigation direction

  • Identify deployments using zerox and determine whether version 1.1.20 is present.
  • Temporarily reject or strictly allowlist untrusted document URLs and permitted file extensions.
  • Restrict the document processor's operating-system privileges and network access.
  • Monitor the GitHub issue and vendor repository for confirmed remediation guidance.
  • Apply a vendor-supported fixed release when one is explicitly identified.

Validation and detection

  • Inventory applications, containers, and services that depend on zerox.
  • Trace whether untrusted users can control document URLs or their extensions.
  • Review logs for unusual shell activity originating from document-processing services.
  • Confirm processors run with minimal filesystem, credential, and network permissions.
  • Verify the installed version against updated vendor and CVE guidance.
Prepared
Confidence
medium
Sources
6

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.

cwe · medium confidence lookup

CWE-78: Command execution behavior lookup

Command injection weaknesses can lead defenders to review execution techniques and command interpreter telemetry. Open the exact CWE lookup page first, then review the ATT&CK searches from that MITRE weakness context. This is a Glexia lookup hint, not an official ATT&CK mapping.

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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-2026-85672 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
Critical
CVSS
9.8 (3.1)
Known Exploited
No
Published

Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/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.

2CVSS vectors
3Timeline events
1ADP providers
5Source links

SSVC decision data

CISA-ADPCISA Coordinator
Timestamp
Version
2.0.3
Exploitation: pocAutomatable: yesTechnical Impact: total

CVSS vector scores

2 official scores

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
9.8CVSS 3.1CriticalCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H3.95.9VulnCheck
9.3CVSS 4.0CriticalCVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N——VulnCheck

Vulnerability scoring details

Base CVSS 4.0 score

9.3Critical
CVSS 4.0 vector shape for CVE-2026-85672Attack VectorAttack ComplexityAttack RequirementsPrivileges RequiredUser InteractionVS ConfidentialityVS IntegrityVS AvailabilitySS ConfidentialitySS IntegritySS Availability

Vector: CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N

Attack Vector
NetworkAdjacentLocalPhysical
Attack Complexity
LowHigh
Attack Requirements
NonePresent
Privileges Required
NoneLowHigh
User Interaction
NonePassiveActive
VS Confidentiality
HighLowNone
VS Integrity
HighLowNone
VS Availability
HighLowNone
SS Confidentiality
HighLowNone
SS Integrity
HighLowNone
SS Availability
HighLowNone

Vulnerability timeline

Timeline events are normalized from CVE metadata, CNA source timelines, ADP timelines, and KEV metadata when present.

  1. CVE reservedCVE Program

    The CVE ID was reserved by the assigning CNA.

  2. CVE publishedCVE Program

    The CVE record was published.

  3. CVE updatedCVE Program

    The CVE record metadata indicates this as the latest update time.

ADP provider summaries

CISA-ADPCISA ADP Vulnrichment
other:ssvc

Source materials

Affected products

Products and packages named in the record

VendorProductVersion / packageStatus
getomni-aizerox0unaffected
Weakness

CWE details

CWE-78

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

CWE-78 · source CWE mapping

Improper Neutralization of Special Elements used in an OS Command ('OS Command Injection')

Improper Neutralization of Special Elements used in an OS Command ('OS Command Injection') represents a recurring weakness pattern that can create exploitable paths when design, validation, or implementation controls are missing.

Open CWE intelligenceSame-CWE CVEs