PatchTheCVECVE-2015-2987: Type74 ED before 4.0 misuses 128-bit ECB encryption for small files, which makes it easier for attackers to ob
CVE-2015-2987 is a low-severity flaw (CVSS 2.6) affecting ed. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.
Type74 ED before 4.0 misuses 128-bit ECB encryption for small files, which makes it easier for attackers to obtain plaintext data via differential cryptanalysis of a file with an original length smaller than 128 bits.
Why this priority
- No elevated risk signals yet
A fixed release or distro patch exists.
Risk facts
| CVSS score | 2.6 (Low) |
| EPSS exploit chance | 0.7% (top 47%) |
| CISA exploited list | No |
| Weakness | CWE-17 |
| Published | 2015-08-28 |
| Last modified | 2026-06-17 |
Last updated 2026-06-17 · Sources: CVE Program, NVD, CISA KEV, EPSS and vendor advisories · How we score
Am I affected?
Timeline
- Published CVE record published
- Updated Record last modified
Scores and fixes here are computed automatically from those and other public sources. Confirm with the vendor advisory before changing production systems.
Quick answers
How do I fix CVE-2015-2987?
ed: upgrade to newer than 3.4. Exact commands for each OS are on this page.
Is CVE-2015-2987 being exploited?
CVE-2015-2987 is not on the CISA Known Exploited Vulnerabilities list at the time of the last update. Check again, as this can change.
What does CVE-2015-2987 affect?
CVE-2015-2987 affects ed. Severity is low (CVSS 2.6). Type74 ED before 4.0 misuses 128-bit ECB encryption for small files, which makes it easier for attackers to obtain plaintext data via differential cryptanalysis of a file with an original length smaller than 128 bits.
How urgent is CVE-2015-2987?
Priority 22/100. No elevated risk signals yet.
Related CVEs
- CVE-2017-5357 HIGH 7.5 MITIGATE UPGRADE regex.c in GNU ed before 1.14.1 allows attackers to cause a denial of service (crash) via a malformed command,