CVE-2021-31487

Remote code execution via DWF heap overflow

Published Jun 15, 2021 · Updated Aug 3, 2024

Out-of-bounds write in OpenText Brava! Desktop 16.6.3.84 allows remote attackers to execute arbitrary code via a malicious DWF file. The DWF parser fails to validate attacker-controlled lengths before copying data into a fixed-size heap buffer, writing past the allocation. Exploitation requires a user to visit a malicious page or open the file, after which code runs with the current process context.

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

Out-of-bounds write in OpenText Brava! Desktop 16.6.3.84 allows remote attackers to execute arbitrary code via a malicious DWF file. The DWF parser fails to validate attacker-controlled lengths before copying data into a fixed-size heap buffer, writing past the allocation. Exploitation requires a user to visit a malicious page or open the file, after which code runs with the current process context.

The record

CVE
CVE-2021-31487
Published
Jun 15, 2021
Updated
Aug 3, 2024
Vendor
OpenText
Product
Brava! Desktop
Classifications
CWE-787, T1203
Attack vector
local
Privileges
unauthenticated

Timeline

How it unfolded

  1. Jun 15, 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=16.6.3.84

What conditions does exploitation require?

Attack vectorlocal
Required privilegesunauthenticated

What is affected?

OpenText · Brava! Desktopversion=16.6.3.84

Published CVSS scores

7.8Zero Day InitiativeCVSS:3.0/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H
7.8NVDCVSS: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.

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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-787Out-of-bounds Write
T1203Exploitation for Client Execution

Public exploit references

No public exploit references are available in this record.

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Technologies

Your stack

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Your stack

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