CVE-2025-9904 — Unallocated memory access vulnerability in print processing of Generic Plus PCL6 Printer Driver /...

Triage

Is it exploited, how likely is exploitation, what does it touch, and how severe do the sources call it.

CISA SSVC assessment CISA

Three decision points CISA publishes for the CVEs it assesses (SSVC 2.0.3). A stakeholder decision, not a severity score.

Remediation

Fixes and mitigations documented by the sources — linked to the original advisory.

No fix documented by the sources we poll. That does not mean none exists: check the vendor advisory.

First 24 hours

Ordered from the record’s own fields — exposure first, because you cannot patch what you have not found. A rule-generated starting point.

1. Identify exposed assets running the affected vendor/product/version combinations (Canon Inc. CARPS2 Printer Driver, Canon Inc. Generic FAX Driver, Canon Inc. Generic Plus LIPS4 Printer Driver…).
2. The attack is network-based and needs no privileges: restrict exposure (ACLs, VPN, WAF) until patched.
3. No fix documented in the sources: reduce exposure and monitor the vendor advisory.
4. Search available logs for exploit probes, errors and authentication anomalies.

Affected scope

Vendor, product and versions as the sources word them.

Attack characteristics

The CVSS vector, decoded. It describes the attack, not your exposure to it.

Every base score collected

Sources score independently and may disagree; each row says who scored it and under which version.

Weakness MITRE

Weakness class according to MITRE’s CWE catalog.

CWE-696

Other CVEs with this weakness →

EPSS over time FIRST

Oct 18, 2026 → Oct 20, 2026 · 3 reading(s) · max 0.38%

Detection

Read off the CVSS vector and the weakness class. Starting points, not tested rules.

• Prioritize edge telemetry for the network-reachable component (proxy, WAF, IDS/IPS).

Timeline

What happened to this CVE, newest first.

• 2026
• Affected products added · canon inc./generic plus pcl6 printer driver, canon inc./generic plus ufr ii printer driver, canon inc./generic plus lips
  Oct 18, 2026 · CVE Program (cve.org) e CISA ADP
• SSVC assessment updated
  Oct 18, 2026 · CVE Program (cve.org) e CISA ADP
• Record published
  Oct 18, 2026
• CVSS changed · 5.3
  Oct 18, 2026 · NIST National Vulnerability Database
• Source status changed · → Deferred
  Oct 18, 2026 · NIST National Vulnerability Database
• Record created in this database
  Oct 18, 2026 · Alertas do Telegram
• 2025
• CVE published
  Sep 28, 2025 · Canon

Source activity

Repeated readings are counted rather than listed.

• 2× References added · Oct 18, 2026 – Oct 18, 2026
• 1× Official description updated · Oct 18, 2026 – Oct 18, 2026

References

8 on the record

• www.canon-europe.com/support/product-security/
  vendor-advisory, NIST National Vulnerability Database
• psirt.canon/advisory-information/cp2025-005/
  vendor-advisory, NIST National Vulnerability Database
• www.canon-europe.com/support/product-security
  GitHub Security Advisories
• psirt.canon/advisory-information/cp2025-005
  GitHub Security Advisories
• canon.jp/support/support-info/250925vulnerability-response
  vendor-advisory, NIST National Vulnerability Database
• www.usa.canon.com/about-us/to-our-customers/cp2025-005-vulnerabilities-remediation-for-
  vendor-advisory, NIST National Vulnerability Database
• nvd.nist.gov/vuln/detail/CVE-2025-9904
  GitHub Security Advisories
• github.com/advisories/GHSA-hv8v-h5q2-gmv5
  GitHub Security Advisories

Elsewhere on this site

Related CVEs (same products)

• Medium CVE-2025-7698 Out-of-bounds read vulnerabilities in print processing of Generic Plus PCL6 Printer Driver /... Sep 28, 2025
• Medium CVE-2025-9903 Out-of-bounds write vulnerabilities in print processing of Generic Plus PCL6 Printer Driver /... Sep 28, 2025

Not in any source we poll

Listed rather than left blank: an empty field and an unmeasured one look identical on screen, and only one is a reason to look elsewhere.

• No fixed version, patch or mitigation documented.
• No confirmed IOCs, IP addresses, domains, file hashes, or malware artifacts supplied.
• No organization-specific asset inventory, compensating-control status, or patch deployment evidence supplied.
• No exploit packet captures, log samples, or incident case IDs supplied.

Answered from this record

Text assembled only from the fields above — no additional claims.

What should defenders know first?

CVE-2025-9904 is "Unallocated memory access vulnerability in print processing of Generic Plus PCL6 Printer Driver /...", rated Medium. It affects CARPS2 Printer Driver (Canon Inc.); versions are in the scope table. It is not in CISA KEV, which does not rule out exploitation. CVSS 5.3 describes technical severity. EPSS 0.38% estimates the probability of exploitation in 30 days; neither replaces your asset context. First verify whether exposed or business-critical assets run the affected versions, apply vendor fixes or mitigations, and preserve logs for review.

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