CVE-2013-4852: n/a vulnerability

CVE-2013-4852: Integer overflow in PuTTY 0.62 and earlier, WinSCP before 5.1.6, and other products that use PuTTY allows r...

Integer overflow in PuTTY 0.62 and earlier, WinSCP before 5.1.6, and other products that use PuTTY allows remote SSH servers to cause a denial of service (crash) and possibly execute arbitrary code in certain applications that use PuTTY via a negative size value in an RSA key signature during the SSH handshake, which triggers a heap-based buffer overflow.

UnknownCVSS not scoredNot KEV-listedUpdatedAug 6, 2024, 16:59 UTC (UTC+00:00)

Security readout for executives and security teams

This flaw affects old PuTTY-based SSH clients. A malicious or compromised SSH server could crash the client during connection setup and, in some applications using PuTTY code, might run code on the connecting user’s machine. Risk is concentrated in legacy tools and embedded PuTTY integrations. Exposure is likely limited to systems still running PuTTY 0.62 or earlier, WinSCP before 5.1.6, or software bundling vulnerable PuTTY code. Administrative workstations, jump boxes, and automation hosts with legacy SSH clients deserve review. Treat this as a targeted legacy-client risk. Prioritize privileged admin endpoints and any software that embeds PuTTY. It is less urgent where modern supported SSH clients are already enforced. Mitigation focus: Upgrade PuTTY-based clients beyond the affected releases using vendor guidance.; Upgrade WinSCP to 5.1.6 or later where applicable.; Identify third-party products that embed PuTTY and request vendor status..

Prepared: Jun 14, 2026, 21:50 UTC (UTC+00:00)

Generated from the cited source records. This long-tail analysis has not been individually reviewed by a named human.

Potential ATT&CK relevance

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Vulnerability profileCVE Program record

Severity: Unknown
CVSS: Not scored
Known Exploited: No
Published: Aug 19, 2013, 23:00 UTC (UTC+00:00)

Official CVE source material

CNA and ADP enrichment extracted from CVE v5

These fields come from the CVE record and ADP containers, not from Glexia's Take. They preserve time-varying source decisions such as CISA SSVC, KEV status, CVSS metrics, and provider references.

0CVSS vectors

0Timeline events

0ADP providers

1Source links

CVSS and timeline data

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Source materials

CVE List V5 sourceCVE List V5

Affected products

Products and packages named in the record

VendorProductVersion / packageStatus

n/an/an/aListed

Weakness

CWE details

No CWE listed

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