No exploitation reported

CVE-2016-2849

No exploitation reported by the sources we read.

Published2016-05-13
WeaknessCWE-200

Am I affected?

With a domain, we read the version its public headers and pages expose. A distribution build can carry the fix under an older number.

Description

Botan before 1.10.13 and 1.11.x before 1.11.29 do not use a constant-time algorithm to perform a modular inverse on the signature nonce k, which might allow remote attackers to obtain ECDSA secret keys via a timing side-channel attack.

Timeline

dates in UTC

2016-05-1314:59CVE publishedNVD

Observed activity

isMalicious corpus · updated 2026-10-23 18:48 UTC

Indicators tagged with this CVE, per day0 indicators over 7 days

Block these indicators

Firewall list (EDL, text): https://api.ismalicious.com/edl/cve/CVE-2016-2849?format=txt
CSV export: https://api.ismalicious.com/edl/cve/CVE-2016-2849?format=csv
TAXII collection of exploited CVEs
The EDL and CSV take an API key on the Pro plan.

Versions per branch

NVD

Botan project botan

Branch	Affected	Fixed in	Source
1.10	= 1.10.12	no fix published	NVD
1.11	= 1.11.0	no fix published	NVD
1.11	= 1.11.1	no fix published	NVD
1.11	= 1.11.2	no fix published	NVD
1.11	= 1.11.3	no fix published	NVD
1.11	= 1.11.4	no fix published	NVD
1.11	= 1.11.5	no fix published	NVD
1.11	= 1.11.6	no fix published	NVD
1.11	= 1.11.7	no fix published	NVD
1.11	= 1.11.8	no fix published	NVD
1.11	= 1.11.9	no fix published	NVD
1.11	= 1.11.10	no fix published	NVD

Debian debian linux

Branch	Affected	Fixed in	Source
8.0	= 8.0	no fix published	NVD

Fedoraproject fedora

Branch	Affected	Fixed in	Source
24.x	= 24	no fix published	NVD

as publishedRanges as NVD and OSV publish them; a distribution’s build can be fixed under an older number.

Fix

Advisories and patches

botan.randombit.netVendor Advisory
marc.infoVendor Advisory

Detection

Nuclei template: none so far
Exploit-DB: no entry
Proof-of-concept repositories: none listed

Sources

NVDCVSS 3.07.5read 2026-10-23
NVDCVSS 2.05read 2026-10-23
NVDweakness (CWE)CWE-200read 2026-10-23
FIRST EPSSEPSS score2.8 %2026-10-22

Technical details

CVSS v3 Vector: CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N
Published: 2016-05-13
Last Modified: 2026-06-17
NVD status: Modified

Frequently asked questions

What is CVE-2016-2849?

Is CVE-2016-2849 actively exploited?

Active exploitation of CVE-2016-2849 has not been confirmed. Its EPSS score was 2.8% on 2026-10-22, the estimated probability of exploitation in the next 30 days.

What is the CVSS score for CVE-2016-2849?

CVE-2016-2849 has a CVSS v3 base score of 7.5 (HIGH severity), with vector string CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N.

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