HOMEVULNERABILITIESCVE-2021-21773
HIGH

CVE-2021-21773

CWE-131Published: March 31, 2021· Updated: Jun 17, 2026

7.8
CVSS v3.1

Official Description

An out-of-bounds write vulnerability exists in the TIFF header count-processing functionality of Accusoft ImageGear 19.8. A specially crafted malformed file can lead to memory corruption. An attacker can provide a malicious file to trigger this vulnerability.

NVD Source

Technical Analysis

CVE-2021-21773 requires local access, meaning attackers must already have a foothold on the target system.

Exploitation does not require any privileges, though user interaction (Required) is needed, which slightly reduces the risk of mass automated attacks.

A successful exploit results in complete confidentiality breach (data exposure), full integrity compromise (data manipulation), availability disruption (denial of service), with a CVSS base score of 7.8.

CVSS v3.1 Vector Breakdown

Exploitability
Attack VectorLocal
Attack ComplexityLow
Privileges Req.None
User InteractionRequired
ScopeUnchanged
Impact
ConfidentialityHigh
IntegrityHigh
AvailabilityHigh
CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H

Affected Vendors & Products

accusoft1 product(s)
imagegear
Source: NVD CPE · 1 total CPE entries

Exploit & PoC Resources

NO KNOWN EXPLOITNo public exploit confirmed at this time
Exploit-DB
Offensive Security exploit database
GitHub PoC Search
Community PoC repositories
Rapid7 / Metasploit
Metasploit module search
PacketStorm
Security advisories & exploits
NVD Detail
Official NIST entry
MITRE CVE
CVE Program entry
External links open in a new tab. Always verify in a controlled environment before use.

Official Patches & Advisories

ADVISORYhttps://talosintelligence.com/vulnerability_reports/TALOS-2021-1227
ADVISORYhttps://talosintelligence.com/vulnerability_reports/TALOS-2021-1227

All References (2)

→
https://talosintelligence.com/vulnerability_reports/TALOS-2021-1227Exploit · Third Party Advisory
→
https://talosintelligence.com/vulnerability_reports/TALOS-2021-1227Exploit · Third Party Advisory

Quick Facts

CVE IDCVE-2021-21773
CVSS Score7.8 / 10
SeverityHIGH
WeaknessCWE-131
CISA KEVNo
Affected1 vendor(s)
PublishedMar 31, 2021

Related CVEs (CWE-131)

CVE-2026-41676
9.8
CVE-2001-0248
9.8
CVE-2025-66216
9.8
CVE-2021-0254
9.8
CVE-2023-5941
9.8
CVE-2001-0249
9.8

Recommended Actions

  • →Apply vendor patches immediately
  • →Monitor CVE-2021-21773 in threat intel feeds
  • →Review IDS/IPS signatures for exploitation attempts
Data sourced from NVD (NIST), CISA KEV, and EPSS (FIRST). Analysis generated by CTIWATCH.COM. CVE data is provided under the NVD usage policy.
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