CVE-2011-4607

CVE-2011-4607 is a low-severity vulnerability in Putty with a CVSS 2.0 base score of 2.1. It is not currently listed as actively exploited by CISA, and its EPSS exploit-prediction score is low. The underlying weakness is classified as CWE-119.

Key facts

Description

PuTTY 0.59 through 0.61 does not clear sensitive process memory when managing user replies that occur during keyboard-interactive authentication, which might allow local users to read login passwords by obtaining access to the process' memory.

Frequently asked questions

What is CVE-2011-4607?
PuTTY 0.59 through 0.61 does not clear sensitive process memory when managing user replies that occur during keyboard-interactive authentication, which might allow local users to read login passwords by obtaining access to the process' memory.
How severe is CVE-2011-4607?
CVE-2011-4607 has a CVSS 2.0 base score of 2.1, rated low severity.
Is CVE-2011-4607 being actively exploited?
It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (33rd percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2011-4607?
CVE-2011-4607 primarily affects Putty. In total, 3 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.
How do I fix CVE-2011-4607?
Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.
When was CVE-2011-4607 published?
CVE-2011-4607 was published on 2013-08-23 and last updated on 2026-06-16.

References

Affected products (3)

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