CVE-2021-31514

Code execution via CGM parser buffer overwrite

Published Jun 29, 2021 · Updated Oct 21, 2024

Out-of-bounds write in OpenText Brava! Desktop Build 16.6.4.55 allows remote attackers to execute code via a crafted CGM file. During CGM parsing, insufficient validation of user-supplied data permits a write past the end of an allocated buffer. A victim must visit a malicious page or open the file, after which code runs in the context of the current process.

CVSS severity7.8
High
EPSS probability1.81%
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 Build 16.6.4.55 allows remote attackers to execute code via a crafted CGM file. During CGM parsing, insufficient validation of user-supplied data permits a write past the end of an allocated buffer. A victim must visit a malicious page or open the file, after which code runs in the context of the current process.

The record

CVE
CVE-2021-31514
Published
Jun 29, 2021
Updated
Oct 21, 2024
Vendor
OpenText
Product
Brava! Desktop
Classifications
CWE-787, T1203, T1204.002
Attack vector
local
Privileges
unauthenticated

Timeline

How it unfolded

  1. Jun 29, 2021CVE publishedPublication date reported by the CVE source.
  2. Oct 21, 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

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.

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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
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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