CVE-2013-4852
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…
- 6.8MediumCVSS base score
- 3.4%Exploitation in 30 daysEPSS · top 11% of all CVEs
- NoKnown exploitednot in CISA's KEV catalog
- NonePublic exploitsnone known yet
Description
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.
Timeline
ID reserved
By mitre
- 34 days later
· 34 days later
Published
- 11 years later
· 11 years later
Record updated
Changes after publication (a new score, a public exploit, EPSS crossing 1, 10 or 50 %, leaving KEV) are kept since November 2026; earlier ones are not known.
Scores
| Scored by | CVSS | Score | Vector |
|---|---|---|---|
| NVDNVD · Modified | 2.0 | Medium6.8 | AV:N/AC:M/Au:N/C:P/I:P/A:P |
- EPSS (exploitation in 30 days)
- 3.4% · top 11% of all CVEs (10 Nov 2026)
The list uses the assigner's score when there is one, then CISA's, then NVD's: Medium 6.8.
Affected products
n/a
- affected n/a
References
11
- 54533 (opens in a new tab)third-party-advisoryx_refsource_SECUNIAx_transferred
- 54517 (opens in a new tab)third-party-advisoryx_refsource_SECUNIAx_transferred
- http://winscp.net/tracker/show_bug.cgi?id=1017 (opens in a new tab)x_refsource_MISCx_transferred
- http://bugs.debian.org/cgi-bin/bugreport.cgi?bug=718779 (opens in a new tab)x_refsource_CONFIRMx_transferred
- http://www.search-lab.hu/advisories/secadv-20130722 (opens in a new tab)x_refsource_MISCx_transferred
- DSA-2736 (opens in a new tab)vendor-advisoryx_refsource_DEBIANx_transferred
- http://svn.tartarus.org/sgt?view=revision&sortby=date&revision=9896 (opens in a new tab)x_refsource_MISCx_transferred
- openSUSE-SU-2013:1347 (opens in a new tab)vendor-advisoryx_refsource_SUSEx_transferred
- 54379 (opens in a new tab)third-party-advisoryx_refsource_SECUNIAx_transferred
- http://www.chiark.greenend.org.uk/~sgtatham/putty/wishlist/vuln-signature-stringlen.html (opens in a new tab)x_refsource_CONFIRMx_transferred
- openSUSE-SU-2013:1355 (opens in a new tab)vendor-advisoryx_refsource_SUSEx_transferred
Sources
The same CVE in the primary databases and aggregators, to check against.
- CVE.org record (opens in a new tab)
- CVE List JSON (GitHub) (opens in a new tab)
- NVD (opens in a new tab)
- FIRST EPSS (opens in a new tab)
- EUVD EUVD-2013-4697 (opens in a new tab)
- OSV.dev (opens in a new tab)
- GitHub Advisories (opens in a new tab)
- CIRCL Vulnerability-Lookup (opens in a new tab)
Badge for a README or a ticket
[](https://cveledger.app/cve/CVE-2013-4852)Record last updated .