The MMS BER decoder contains a flaw in decoding fixed-width BER fields (boolean/integer): an...
Summary
Vulnerability reported (CVE-2026-65421). Risk of unauthorized operations or information disclosure.
Original description
The description as published by the source.
The MMS BER decoder contains a flaw in decoding fixed-width BER fields
(boolean/integer): an attacker-supplied length value is not validated,
causing a read past the end of a heap buffer. This leads to termination
of the MMS service process and a denial-of-service condition.
Source: NIST National Vulnerability Database NVD GitHub Advisory
Auto-generated summary
Assembled by SecPulse from the source data (CVSS, CWE, affected versions) using templates — no AI involved. Check the original description and references below for exact details.
A vulnerability tracked as CVE-2026-65421 has been found.
Risk of unauthorized operations or information disclosure. CVSS score: 6.5/10.
What to do: apply the vendor's official patched release.
If unsure, ask your IT team or search "CVE-2026-65421" on the vendor's site.
CVE-2026-65421 — CWE-125 / CVSS v3 6.5
Attack vector: adjacent-network / unauthenticated / no user interaction
Plan: 1) Audit SBOM/dependencies, 2) Stage→prod upgrade, 3) Add WAF/proxy monitoring on affected endpoints, 4) Hunt IOCs in logs.
Refs: see the GHSA / vendor advisory / patched release linked on this page.
Out-of-bounds read (CWE-125) has been reported.
Check the vendor advisory for the affected versions.
Severity: Medium (CVSS 6.5/10). Risk of unauthorized operations or information disclosure.
Update to the patched release per vendor advisory.
Until the patch is applied: disable the affected feature, apply WAF rules, or restrict access via network ACLs.
Search webserver/proxy logs for unusual request patterns matching this CVE's known IOCs. Audit SBOM/dependencies to find affected services.
Response actions
Concrete steps and command examples for SOC/SRE teams to execute in order
-
1Identify exposure identify
Audit SBOM/dependencies for affected components.資産台帳・SBOM・依存マニフェストで影響コンポーネントを特定する。
-
2Post-deployment verification verify
Confirm patched version is live in productionパッチ適用後、ステージングで PoC または同等の悪用パターンを再現して脆弱性が閉じたことを確認。本番ではアクセスログ・WAF でアラート再発が無いか継続監視。
References
- web ics-cert@hq.dhs.gov
- web ics-cert@hq.dhs.gov
- web nvd.nist.gov
- web github.com