CVE-2023-26966

Exploitation

Public exploit code exists. CISA's assessment records a public proof of concept. That is not a report of exploitation in the wild.

SSVC decision

• ExploitationpocPublic proof-of-concept exploit code exists. Not a report of exploitation in the wild.
• AutomatablenoAt least one step from reconnaissance to exploitation cannot be reliably automated.
• 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

0.42% probability of exploitation activity in the next 30 days.

EPSS percentile

Ranks above 34.5% of scored records. A rank, not a probability.

NVD base score

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

NVD CVSS vector

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

NVD analysis status

Modified. NVD last modified this record on 2026-06-17.

Red Hat severity

Moderate. 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

2023-06-29 00:00Z3 YR AGO

Last updated

2025-11-03 20:35Z10 MO AGO

Reserved

2023-02-27

Assigning CNA

mitre

Record state

PUBLISHED

Severity

Not rated by the issuing CNA

CNA CVSS vector

Not published by the issuing CNA

Weaknesses

• CWE-120Buffer Copy without Checking Size of Input ('Classic Buffer Overflow')Base

Data version

5.2

Document digest

177995bfd32e30a8aff4cef5827529f5ff1bac8b8bbc5be2f8342fbf23575da0

• gitlab.comhttps://gitlab.com/libtiff/libtiff/-/issues/530
• gitlab.comhttps://gitlab.com/libtiff/libtiff/-/merge_requests/473
• lists.debian.org[debian-lts-announce] 20230731 [SECURITY] [DLA 3513-1] tiff security updatehttps://lists.debian.org/debian-lts-announce/2023/07/msg00034.htmlmailing-list
• lists.debian.orghttps://lists.debian.org/debian-lts-announce/2025/01/msg00019.html