Security readout for executives and security teams
Plain-English summary
CVE-2026-21495 is a denial-of-service risk in iccDEV before 2.3.1.2. A specially crafted TIFF handled by the TIFF Image Reader can trigger a division-by-zero crash. The issue does not indicate data theft or tampering, but it can interrupt tools or workflows that process untrusted image files.
Executive priority
Treat as a moderate operational resilience issue. It is unlikely to compromise confidentiality or integrity based on current sources, but could disrupt image-processing workflows. Patch during the next standard maintenance cycle, sooner for services that process untrusted TIFF files at scale.
Technical view
iccDEV versions before 2.3.1.2 contain improper input handling in the TIFF Image Reader, classified as CWE-20 and CWE-369. CVSS 3.1 is 5.5 with local attack vector, no privileges, required user interaction, unchanged scope, and high availability impact only. The vendor advisory states the issue is patched in 2.3.1.2.
Likely exposure
Exposure is most relevant where iccDEV libraries or tools process TIFF files, especially files supplied by users, partners, or automated intake pipelines. Systems not using iccDEV, not processing TIFF images, or already on 2.3.1.2 are less likely to be exposed.
Exploitation context
The provided sources do not report active exploitation, and the CVE is not marked as CISA KEV. Exploitation requires a local/user-assisted context according to the CVSS vector, meaning the vulnerable component must be made to process a malicious TIFF file.
Researcher notes
Evidence is limited to the CVE record, GitHub advisory, and patch commit. The root cause is division by zero in TIFF reading before 2.3.1.2. Avoid assuming remote exploitability or broader product impact unless downstream applications expose iccDEV processing to attacker-controlled files.
Mitigation direction
- Upgrade iccDEV to version 2.3.1.2 or later.
- Prioritize systems that process externally supplied TIFF files.
- Check vendor advisory and commit details for implementation-specific guidance.
- Limit untrusted TIFF processing until upgraded where practical.
Validation and detection
- Inventory applications and pipelines using iccDEV.
- Confirm installed iccDEV versions are 2.3.1.2 or later.
- Identify TIFF-processing workflows accepting external or untrusted files.
- Review dependency manifests, build artifacts, and vendor packages for bundled iccDEV.
Public sources used
Generated from the cited source records. This long-tail analysis has not been individually reviewed by a named human.
Conservative CVE-to-ATT&CK context
These mappings and lookup hints may be relevant to the vulnerability behavior, CWE, affected product, or exposure path. Glexia-inferred context is not an official MITRE, ATT&CK, CWE, or CVE Program mapping.
ATT&CK lookup starting points
Use these exact CWE pages and searches to review the Glexia ATT&CK library from this CVE's weakness and description context.
CWE-20: Exact CWE lookup
Use the exact CWE identifier as the starting point before reviewing related ATT&CK behavior. Open the exact CWE lookup page first, then review the ATT&CK searches from that MITRE weakness context. This is a Glexia lookup hint, not an official ATT&CK mapping.
Open ATT&CK lookupCWE-369: Exact CWE lookup
Use the exact CWE identifier as the starting point before reviewing related ATT&CK behavior. Open the exact CWE lookup page first, then review the ATT&CK searches from that MITRE weakness context. This is a Glexia lookup hint, not an official ATT&CK mapping.
Open ATT&CK lookupCVE-2026-21495 mapping review
Open the CVE-to-ATT&CK bridge for reviewed, inferred, or future official mappings tied to this CVE.
Open ATT&CK lookup- Severity
- Medium
- CVSS
- 5.5 (3.1)
- Known Exploited
- No
- Published
Vector: CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H
CNA and ADP enrichment extracted from CVE v5
These fields come from the CVE record and ADP containers, not from Glexia's Take. They preserve time-varying source decisions such as CISA SSVC, KEV status, CVSS metrics, and provider references.
CVSS vector scores
1 official scoreWe collect every scored CVSS vector available in the official CNA and ADP containers. When more than one version is present, the table keeps the source vectors side by side instead of collapsing them into the highest score.
CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H1.83.6Primary CVE scoreVulnerability scoring details
Base CVSS 3.1 score
5.5MediumVector: CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H
Source materials
- CVE List V5 sourceCVE List V5
- https://github.com/InternationalColorConsortium/iccDEV/security/advisories/GHSA-xhrm-79rg-5784CVE reference · x_refsource_CONFIRM
- https://github.com/InternationalColorConsortium/iccDEV/commit/10c34179a0332a869c2b46e305a9cd23a6311dfeCVE reference · x_refsource_MISC
Products and packages named in the record
CWE details
CWE links open Glexia weakness intelligence pages with official CWE context, developer remediation guidance, and related CVE mappings.
Improper Input Validation
Improper Input Validation represents a recurring weakness pattern that can create exploitable paths when design, validation, or implementation controls are missing.
Divide By Zero
Divide By Zero represents a recurring weakness pattern that can create exploitable paths when design, validation, or implementation controls are missing.