CVE-2021-31504

Code execution via unvalidated PDF pointer dereference

Published Aug 3, 2021 · Updated Aug 3, 2024

Untrusted pointer dereference in OpenText Brava! Desktop Build 16.6.3.84 allows remote attackers to execute code via a crafted PDF. The PDF parser dereferences a user-supplied value as a pointer without first validating it. Execution occurs in the current process only after the target opens the malicious file or visits a page that supplies it.

CVSS severity7.8
High
EPSS probability1.42%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Untrusted pointer dereference in OpenText Brava! Desktop Build 16.6.3.84 allows remote attackers to execute code via a crafted PDF. The PDF parser dereferences a user-supplied value as a pointer without first validating it. Execution occurs in the current process only after the target opens the malicious file or visits a page that supplies it.

The record

CVE
CVE-2021-31504
Published
Aug 3, 2021
Updated
Aug 3, 2024
Vendor
OpenText
Product
Brava! Desktop
Classifications
CWE-822, T1203, T1204.002
Attack vector
local
Privileges
unauthenticated

Timeline

How it unfolded

  1. Aug 3, 2021CVE publishedPublication date reported by the CVE source.
  2. Aug 3, 2024Record 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.

  1. Affected versionversion=Build 16.6.3.84 (package 16.6.3.134)

What conditions does exploitation require?

Attack vectorlocal
Required privilegesunauthenticated

What is affected?

OpenText · Brava! Desktopversion=Build 16.6.3.84 (package 16.6.3.134)

Published CVSS scores

6.8NIST NVDAV:N/AC:M/Au:N/C:P/I:P/A:P
7.8Zero Day InitiativeCVSS:3.0/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H
7.8NIST NVDCVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H

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.

Daily unique IPsNo honeypot observations are available for this CVE in the selected window.

No observations available

Sep 10, 2026Sep 16, 2026
Latest reporting daySep 16, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectorlocal
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-822Untrusted Pointer Dereference
T1203Exploitation for Client Execution
T1204.002Malicious File

Public exploit references

No public exploit references are available in this record.

Labels summarize the accepted research assessment. They do not indicate a test against your environment.

Technologies

Your stack

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Your stack

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