CVE-2021-21093

Arbitrary code execution via malformed SGI parsing

Published Apr 15, 2021 · Updated Apr 23, 2025

Memory corruption in Adobe Bridge 10.1.1 and earlier and 11.0.1 and earlier allows remote attackers to execute code via a crafted SGI file. The SGI parser fails to validate user-supplied data properly, producing a memory-corruption condition in the current process. Exploitation requires a victim to open the file or visit a malicious page, after which code runs with the current user's privileges.

CVSS severity7.8
High
EPSS probability3.93%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Memory corruption in Adobe Bridge 10.1.1 and earlier and 11.0.1 and earlier allows remote attackers to execute code via a crafted SGI file. The SGI parser fails to validate user-supplied data properly, producing a memory-corruption condition in the current process. Exploitation requires a victim to open the file or visit a malicious page, after which code runs with the current user's privileges.

The record

CVE
CVE-2021-21093
Published
Apr 15, 2021
Updated
Apr 23, 2025
Vendor
Adobe
Product
Adobe Bridge
Classifications
CWE-788, T1204.002
Attack vector
local
Privileges
unauthenticated

Timeline

How it unfolded

  1. Apr 15, 2021CVE publishedPublication date reported by the CVE source.
  2. Apr 23, 2025Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

Compare your product and version with the public record. A matching version still requires validation against your environment.

Is a vulnerable build present?

Compare these published version ranges with your installed build and any vendor patches.

  1. Affected versionversion=unspecified <=10.1.1
  2. Affected versionversion=unspecified <=11.0.1
  3. Affected versionversion=unspecified <=None

What conditions does exploitation require?

Attack vectorlocal
Required privilegesunauthenticated

What is affected?

Adobe · Adobe Bridgeversion=unspecified <=10.1.1; version=unspecified <=11.0.1; version=unspecified <=None

Published CVSS scores

7.8Trend Micro Zero Day InitiativeCVSS: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-788Access of Memory Location After End of Buffer
T1204.002User Execution: Malicious 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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