Is CVE-2017-9462 in the CISA KEV catalog?

No. CVE-2017-9462 is not currently on the CISA Known Exploited Vulnerabilities list.

What is the CVSS severity of CVE-2017-9462?

CVE-2017-9462 has a CVSS v3 base score of 8.8 (HIGH).

What is the EPSS score for CVE-2017-9462?

CVE-2017-9462 has an EPSS score of 21.51% (97th percentile), estimating the probability of exploitation in the next 30 days.

How do I fix CVE-2017-9462?

Upgrade mercurial on debian 11 to 4.3.1-1 or later.

CVE & CISA-KEV Catalog

CVE-2017-9462

HIGHEPSS 97th pctl

8.8

CVSS v3

NVD

Description

In Mercurial before 4.1.3, "hg serve --stdio" allows remote authenticated users to launch the Python debugger, and consequently execute arbitrary code, by using --debugger as a repository name.

CWE-732Incorrect Permission Assignment for Critical Resource

How to fix

Remediation Available

mercurialDebian

Fixed in:4.3.1-1CVE-2017-9462

TridentStack Control can deploy fixes like this automatically across your Windows, macOS, and Linux fleet. See how it works

Remediation is compiled from vendor and distribution security advisories. Always confirm against the linked source for your exact version and platform.

CVSS v3 Vector

Exploitability

Attack VectorNetwork

Attack ComplexityLow

Privileges RequiredLow

User InteractionNone

ScopeUnchanged

Impact

ConfidentialityHigh

IntegrityHigh

AvailabilityHigh

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

Exploit Intelligence

21.51%probability of exploitation in 30 days

97thpercentile

Very high risk: more likely to be exploited than 97% of all known CVEs.

References

Patch1

bugs.debian.org

Vendor Advisory2

Third-Party Advisory5

Related Vulnerabilities

Other CWE-732 (Incorrect Permission Assignment for Critical Resource) vulnerabilities, ordered by exploit likelihood. View all

CVE	Severity	CVSS	EPSS	Exploited	Fix
CVE-2011-3923	Critical	9.8	89%	-	Fix
CVE-2018-15379	Critical	9.8	86%	-	-
CVE-2018-1000207	High	7.2	64%	-	-
CVE-2023-32986	High	8.8	61%	-	-
CVE-2021-44521	Critical	9.1	55%	-	Fix
CVE-2018-13374	Medium	4.3	38%	KEV + Ransom	Fix

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This product uses NVD data but is not endorsed or certified by the NVD. EPSS scores courtesy of FIRST.org (https://www.first.org/epss). Source: CISA KEV Catalog. Data as of 2026-05-13.