CVE-2026-14957: FIPS mode assertion failure via malicious CERT payload

highCVSS 7.5CVE-2026-14957

CSIRTS triage

vendor: Erlang product: Erlang/OTP Denial of service

What: FIPS mode assertion failure triggered by malicious certificate payload causing denial of service.
Who is affected: Erlang/OTP deployments running FIPS mode across affected versions.
Urgency: High severity (CVSS 7.5) and unauthenticated; patches should be prioritized.
Action: Upgrade to patched Erlang/OTP version as soon as available.

AI-assisted analysis generated from the source advisory — verify against the original.

⚡ Watch Erlang/OTP

Get an email when a new Erlang/OTP advisory drops — max one per day, one-click unsubscribe.

Details

Source: Microsoft Security Response Center (INTL · vendor-psirt · site)
Severity: high — CVSS 7.5
Published: 2026-09-02
Exploitation: Not in CISA KEV at last sync

Original advisory: https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-14957

Exploitation outlook

EPSS (FIRST.org) estimates each CVE’s probability of exploitation in the next 30 days — here is the CSIRTS.com read on those numbers.

Low exploitation riskCVE-2026-149570.56% 30-day exploitation probability — currently an unlikely target, but scores change as exploit code circulates. Riskier than 44% of all EPSS-scored CVEs.

Referenced CVEs

CVE	CSIRTS overview	External
CVE-2026-14957	coverage & exploitation status	NVD · CVE.org

Same CVEs, other sources

How other CERTs, PSIRTs and databases cover the vulnerabilities in this advisory.

Recent advisories for FIPS mode assertion

A cluster of recent advisories against the same product widens the attack surface — attackers routinely chain freshly published CVEs on one product, so review these together.

highCVE-2026-14957: In FIPS mode, Libreswan's add_decoded_cert() function calls CERT_ExtractPublicKey() and assert…nvd · 2026-09-02