CVE-2021-31506

Information disclosure via PDF parser out-of-bounds read

Published Jun 29, 2021 · Updated Aug 3, 2024

Out-of-bounds read in OpenText Brava! Desktop Build 16.6.4.55 allows remote attackers to disclose process data via a crafted PDF. The PDF parser fails to validate user-supplied data before reading past the end of an allocated data structure. Exploitation requires the target to visit a malicious page or open a malicious file; code execution requires chaining with another flaw.

CVSS severity3.3
Low
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 read in OpenText Brava! Desktop Build 16.6.4.55 allows remote attackers to disclose process data via a crafted PDF. The PDF parser fails to validate user-supplied data before reading past the end of an allocated data structure. Exploitation requires the target to visit a malicious page or open a malicious file; code execution requires chaining with another flaw.

The record

CVE
CVE-2021-31506
Published
Jun 29, 2021
Updated
Aug 3, 2024
Vendor
OpenText
Product
Brava! Desktop
Classifications
CWE-125, T1204.002
Attack vector
local
Privileges
unauthenticated

Timeline

How it unfolded

  1. Jun 29, 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 16.6.4.55

What conditions does exploitation require?

Attack vectorlocal
Required privilegesunauthenticated

What is affected?

OpenText · Brava! Desktopversion=Build 16.6.4.55

Published CVSS scores

3.3Zero Day InitiativeCVSS:3.0/AV:L/AC:L/PR:N/UI:R/S:U/C:L/I:N/A:N
4.3NIST NVDAV:N/AC:M/Au:N/C:P/I:N/A:N
3.3NIST NVDCVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:L/I:N/A:N

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-125Out-of-bounds Read
T1204.002User Execution: Malicious File

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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