A good internal brief on a security story fits on one page and answers four questions: what happened, does it apply to us, what have we done, and what happens next. Write it for a busy engineering lead or executive who has two minutes. Keep facts, judgments and unknowns visibly apart.
The template
Title and date. Name the story and the date you wrote the brief, since facts change.
What happened. Two or three sentences from primary sources. Say who reported it. If you are relying on a secondary source, say so.
Does it apply to us. One word first: yes, no, unknown. Then the reason in one line: "We run version 4.2, affected range is 4.0 to 4.1." Or: "We do not use the product."
What we did. Checks run, with dates. Mitigations applied. Credentials rotated. Nothing vague.
What we do not know. Open questions. This section builds trust because it shows you are not pretending.
What happens next. Owner, next action, next update time.
Keep facts and judgment apart
Mark each statement as confirmed, reported, or your judgment. A reader should know that "the vendor says no customer data was accessed" is a reported claim, while "our logs show no requests to the endpoint" is a confirmed fact about your system.
Use a decision vocabulary
The CISA SSVC guidance uses four outcomes: Track, Track star, Attend and Act. Track means no action now and keep monitoring. Attend means escalate to supervisory staff and act sooner than standard timelines. Act means escalate to leadership and remediate as soon as possible. A shared vocabulary like that stops arguments about whether something is urgent.
Length and tone
Stay under 300 words if you can. Skip adjectives like "massive" or "devastating". Use plain verbs. Do not guess at the attacker.
Update, do not rewrite
If the story changes, add a dated line at the top: "Update 20 October: vendor released fix 4.2.1." Keep the old text so people can see how the picture developed.
File it
Store briefs in one folder. Six months later, when a customer or auditor asks how you handled that story, the brief is your answer.
Quick check
Who should receive the brief?
Engineering leads, the person who owns customer communication, and whoever signs off on risk. Keep the list short.
Do we need a brief for stories that do not apply?
A two line note is enough: story, reason it does not apply, date.
Sources
Last reviewed: 19 October 2026.
