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CVE-2015-2808

The RC4 algorithm, as used in the TLS protocol and SSL protocol, does not properly combine state data with key data during the…

Low3.7EPSS 73.9%
Published
Updated
Reserved
Assigned by
mitre

Description

The RC4 algorithm, as used in the TLS protocol and SSL protocol, does not properly combine state data with key data during the initialization phase, which makes it easier for remote attackers to conduct plaintext-recovery attacks against the initial bytes of a stream by sniffing network traffic that occasionally relies on keys affected by the Invariance Weakness, and then using a brute-force approach involving LSB values, aka the "Bar Mitzvah" issue.

Timeline

  1. ID reserved

    By mitre

  2. · 1 day later

    Published

  3. · 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

CVSS scores of CVE-2015-2808, by who scored it
Scored byCVSSScoreVector
CISA-ADPADP (enrichment)3.1Low3.7CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:L/I:N/A:N
NVDNVD · Modified3.1Low3.7CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:L/I:N/A:N
EPSS (exploitation in 30 days)
73.9% · top 0.5% of all CVEs (9 Nov 2026)
CISA SSVC
Exploitation: none · Automatable: no · Technical impact: partial
Loading the EPSS history…

The list uses the assigner's score when there is one, then CISA's, then NVD's: Low 3.7.

Weakness

Affected products

  • n/a

    • affected n/a

References (101)

Sources

The same CVE in the primary databases and aggregators, to check against.

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Record last updated .