CVE-2026-21507VulnerabilityPublished 6 Jan 2026

CVE-2026-21507: InternationalColorConsortium iccDEV · Infinite Loop

Affects InternationalColorConsortium iccDEVSource CVE Database V5

Not known to be exploited · CVSS 7.5 High : upgrade to 2.3.1.1 soon.

Data as of 26 Oct 2026, 07:57 UTC

CVSS 3.1 base score

7.5High

How severe the flaw is on the 0–10 CVSS scale.

EPSS: 0.4% chance of exploitation in 30 days – higher than 37% of CVEsExploit Prediction Scoring System: the likelihood attackers will use this flaw soon.
Patch: Available – fixed in 2.3.1.1

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

Attack Vector: Network
Attack Complexity: Low
Privileges Required: None
User Interaction: None
Scope: Unchanged
Confidentiality: None
Integrity: None
Availability: High

Bold values are the worst case: easiest to exploit or largest impact.

Attack Vector: Network: The vulnerable component is bound to the network stack and the set of possible attackers extends beyond the other options listed, up to and including the entire Internet. Such a vulnerability is often termed 'remotely exploitable' and can be thought of as an attack being exploitable at the protocol level one or more network hops away (e.g., across one or more routers).
Attack Complexity: Low: Specialized access conditions or extenuating circumstances do not exist. An attacker can expect repeatable success against the vulnerable component.
Privileges Required: None: The attacker is unauthorized prior to attack, and therefore does not require any access to settings or files to carry out an attack.
User Interaction: None: The vulnerable system can be exploited without any interaction from any user.
Scope: Unchanged: An exploited vulnerability can only affect resources managed by the same security authority. In this case, the vulnerable component and the impacted component are either the same, or both are managed by the same security authority.
Confidentiality: None: There is no loss of confidentiality within the impacted component.
Integrity: None: There is no loss of integrity within the impacted component.
Availability: High: There is total loss of availability, resulting in the attacker being able to fully deny access to resources in the impacted component; this loss is either sustained (while the attacker continues to deliver the attack) or persistent (the condition persists even after the attack has completed). Alternatively, the attacker has the ability to deny some availability, but the loss of availability presents a direct, serious consequence to the impacted component (e.g., the attacker cannot disrupt existing connections, but can prevent new connections; the attacker can repeatedly exploit a vulnerability that, in each instance of a successful attack, leaks a only small amount of memory, but after repeated exploitation causes a service to become completely unavailable).

Definitions: FIRST CVSS v3.1 specification.

Exploitation evidence

Disclosed: evidence found.
CVE published 6 Jan 2026
Detectable: no evidence on record.
No public nuclei template indexed
Weaponised: no evidence on record.
No public exploit code indexed in Metasploit or Exploit-DB
Exploited in the wildExploited: no evidence on record.
Not in CISA KEV and no source reports exploitation
Observed by OffSeq MirageSeen by Mirage: no evidence on record.
No attack traffic recorded by OffSeq Mirage sensors

A missing step is not evidence of safety. Sources: cve.org (opens in a new tab), the Metasploit, Exploit-DB and nuclei-templates index as of 2026-10-26.

Disclosed: The CVE record is public on cve.org. Its publication is t = 0.
Detectable: A public nuclei template can find exposed instances, for defenders and attackers alike.
Weaponised: Public exploit code exists in Metasploit or Exploit-DB, or CISA SSVC reports a public proof of concept.
Exploited in the wild: CISA KEV lists it, CISA SSVC rates exploitation active, or a source reports attacks.
Observed by OffSeq Mirage: OffSeq Mirage honeypot sensors recorded attack traffic for this CVE, or found exposed hosts without attack traffic.

Moments are spaced evenly, not to scale; a dashed line marks a gap of six months or more. Deltas count from t = 0. Sources that give only a date (CISA KEV, Exploit-DB, or a time of exactly 00:00Z) read “same day” rather than hours. Metasploit modules carry the flaw’s disclosure date, not their release date, and nuclei templates carry no date, so both appear above but not on the timeline.

What to do

Upgrade iccDEV and internationalcolorconsortium/iccDEV to 2.3.1.1.

Affected software

Product	Affected	Fixed in
InternationalColorConsortiumiccDEV	Affected <2.3.1.1	Fixed in 2.3.1.1
GitHubinternationalcolorconsortium/iccDEV`pkg:github/internationalcolorconsortium/iccDEV`Other threats	Affected <2.3.1.1	Fixed in 2.3.1.1

Check your own hosts for these packages with threat-finder (opens in a new tab), our free open-source scanner.

AI-suggested

To mitigate CVE-2026-21507, European organizations should immediately upgrade iccDEV to version 2.3.1.1 or later, where the infinite loop issue is resolved. In environments where immediate upgrading is not feasible, implement input validation and sanitization to detect and reject malformed or suspicious ICC profiles before processing. Employ application-level timeouts or watchdog mechanisms to detect and terminate processes stuck in infinite loops. Restrict the acceptance of ICC profiles to trusted sources and avoid automatic processing of unverified profiles. Monitor system performance and logs for signs of abnormal CPU usage indicative of exploitation attempts. Incorporate vulnerability scanning and patch management processes specifically targeting iccDEV and related libraries. For cloud or multi-tenant environments, isolate ICC profile processing to minimize the impact of potential DoS attacks. Finally, maintain awareness of updates from the International Color Consortium and security advisories to respond promptly to any emerging threats or patches.

Description

CVE-2026-21507 is a high-severity vulnerability in iccDEV versions prior to 2.3.1.1, caused by an infinite loop in the CalcProfileID function of IccProfile.cpp. This infinite loop results from an unreachable exit condition, leading to denial of service by exhausting CPU resources. The vulnerability does not impact confidentiality or integrity but severely affects availability. It requires no authentication or user interaction and can be exploited remotely via crafted ICC color profiles. European organizations using iccDEV for color management in imaging, printing, or graphic design software are at risk of service disruption. The issue is fixed in version 2.

Impact

For European organizations, this vulnerability poses a significant risk of denial of service in systems that utilize iccDEV for ICC color profile processing. Industries such as digital media production, professional printing, publishing, and graphic design, which rely heavily on accurate color management, may experience service outages or degraded performance if exposed to malicious ICC profiles. This can disrupt workflows, delay production timelines, and potentially cause financial losses. Additionally, organizations providing cloud-based imaging or printing services could face customer dissatisfaction or reputational damage if their services become unavailable. Since the vulnerability does not affect confidentiality or integrity, data breaches are unlikely; however, availability impacts can cascade into operational disruptions. The risk is heightened in environments that automatically ingest or process ICC profiles from external sources without validation. European regulatory frameworks emphasizing operational resilience, such as NIS2, may require affected organizations to address this vulnerability promptly to maintain compliance.

References

Community reviews

Loading reviews…

Exploitation evidence

What to do

Affected software

Description

AI analysisMachine-generated, updated 13 Jan 2026, 01:03 UTC

WeaknessesCWE-835

Technical details

References

Community reviews

Related threats