CVE-2019-9895: fedoraproject fedora
Vulnerability summary
CVE-2019-9895 is a critical (CVSS 9.8) vulnerability in fedoraproject fedora. EPSS estimates a 2.50% chance of exploitation in the next 30 days, higher than 84.6% of scored vulnerabilities.
Severe, CVSS 9.8 (NVD); no exploitation reported by the 5 checked sources; EPSS 2% (FIRST, 03-11-2026)
Source freshness unavailable
How is this decided?Advisory lineage
Upstream 0 · Downstream 4 · Related 2Timeline
- 21-03-2019PublishedVulnerability first disclosed.
- 04-08-2024Last modifiedVulnerability information updated.
Description
In PuTTY versions before 0.71 on Unix, a remotely triggerable buffer overflow exists in any kind of server-to-client forwarding.
CVSS metrics
5 scores · 4 sources · 2 versions- OSV · AlpineEcosystem advisory · calculated9.8CriticalCVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
- OSV · UbuntuEcosystem advisory · calculated9.8CriticalCVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
- OSV · DebianEcosystem advisory · calculated9.8CriticalCVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
EPSS trend
Probability
2.50%
Chance of exploitation in the next 30 days
Percentile
85%
Versus all other CVEs
30-day change
Decrease -0.07 pp
From 2.57% on 04-10-2026
Known exploited
Compare KEV catalogs
CISA KEVNot in the CISA KEV catalog.
ENISA CNWNot in the ENISA CNW catalog.
CIRCLNot in the CIRCL catalog.
Public exploits
0 foundNo public exploits indexed.
Weaknesses
CWE · root causeAffected systems
Known conditions: network-reachable, no authentication, no user interaction (CVSS vector). Other conditions: not stated in public data.
Alpine1 product
- putty< 0.71-r0
Debian1 product
- putty< 0.70-6
Fedoraproject1 product
- fedoraEOL28 | 29
Putty1 product
- putty< 0.71
Ubuntu1 product
- putty< 0.67-3+deb9u1build0.16.04.1 | All versions (No fix recorded)
5 vendors · 5 products
References
12 links- security.netapp.com/advisory/ntap-20190404-0001/X Refsource CONFIRM
