CVE-2026-28388

Exploitation

Assessed, none found. CISA's assessment recorded neither public exploit code nor evidence of exploitation when it was made.

SSVC decision

• ExploitationnoneCISA recorded no public exploit code and no evidence of exploitation.
• AutomatableyesAn attacker can reliably automate reconnaissance through exploitation, so this scales.
• Technical ImpactpartialSuccessful exploitation gives limited control of the vulnerable component.

CISA publishes the decision points, not a final SSVC decision. The decision also depends on mission and well-being impact, which is a property of your deployment rather than of the vulnerability.

EPSS probability

0.89% probability of exploitation activity in the next 30 days.

EPSS percentile

Ranks above 56.5% of scored records. A rank, not a probability.

NVD base score

7.5 (CVSS v3.x), scored by the NVD independently of the CNA.

NVD CVSS vector

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

NVD analysis status

Modified. NVD last modified this record on 2026-07-24.

Red Hat severity

Low. Red Hat's rating for its own products, not a CVSS rating.

Exploit-prediction scores from FIRST. Independent scoring and analysis status from the NVD. Vendor severity from Red Hat. Exploitation assessment and catalog membership from CISA.

Published

2026-04-07 22:00Z4 MO AGO

Last updated

2026-05-12 12:08Z3 MO AGO

Reserved

2026-02-27

Assigning CNA

openssl

Record state

PUBLISHED

Severity

High (CVSS 7.5)

CNA CVSS vector

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

Weaknesses

• CWE-476NULL Pointer DereferenceBase

Data version

5.2

Document digest

88a42b5279be6479cbb67f9ad153a3621682a73851e053b65b0d9ac3057351f5

• openssl-library.orgOpenSSL Advisoryhttps://openssl-library.org/news/secadv/20260407.txtvendor-advisory
• github.com3.6.2 git commithttps://github.com/openssl/openssl/commit/602542f2c0c2d5edb47128f93eac10b62aeeefb3patch
• github.com3.5.6 git commithttps://github.com/openssl/openssl/commit/d3a901e8d9f021f3e67d6cfbc12e768129862726patch
• github.com3.4.5 git commithttps://github.com/openssl/openssl/commit/a9d187dd1000130100fa7ab915f8513532cb3bb8patch
• github.com3.3.7 git commithttps://github.com/openssl/openssl/commit/5a0b4930779cd2408880979db765db919da55139patch
• github.com3.0.20 git commithttps://github.com/openssl/openssl/commit/59c3b3158553ab53275bbbccca5cb305d591cf2epatch
• cert-portal.siemens.comhttps://cert-portal.siemens.com/productcert/html/ssa-265688.html
• cert-portal.siemens.comhttps://cert-portal.siemens.com/productcert/html/ssa-032379.html